Index

MDN JavaScript pages

This page lists all MDN JavaScript pages along with their summary and tags.

Found 785 pages:

#	Page	Tags and summary
1	JavaScript	JavaScript, Landing, Learn
		JavaScript (JS) is a lightweight, interpreted, programming language with first-class functions. Most well-known as the scripting language for Web pages, many non-browser environments also use it, such as node.js and Apache CouchDB. JS is a prototype-based, multi-paradigm, dynamic scripting language, supporting object-oriented, imperative, and declarative (e.g. functional programming) styles. Read more about JavaScript.
2	A re-introduction to JavaScript (JS tutorial)	CodingScripting, Intermediate, Intro, JavaScript, Learn, Tutorial
		Why a re-introduction? Because JavaScript is notorious for being the world's most misunderstood programming language. It is often derided as being a toy, but beneath its layer of deceptive simplicity, powerful language features await. JavaScript is now used by an incredible number of high-profile applications, showing that deeper knowledge of this technology is an important skill for any web or mobile developer.
3	About JavaScript	Beginner, Introduction, JavaScript
		JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, and is best known as the scripting language for Web pages, but it's used in many non-browser environments as well. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.
4	Closures	Closure, Intermediate, JavaScript
		Closures are functions that refer to independent (free) variables (variables that are used locally, but defined in an enclosing scope). In other words, these functions 'remember' the environment in which they were created.
5	Concurrency model and Event Loop	Advanced, JavaScript
		JavaScript has a concurrency model based on an "event loop". This model is quite different than the model in other languages like C or Java.
6	Enumerability and ownership of properties	JavaScript
		Enumerable properties are those properties whose internal [[Enumerable]] flag is set to true, which is the default for properties created via simple assignment or via a property initializer (properties defined via Object.defineProperty and such default [[Enumerable]] to false). Enumerable properties show up in for...in loops unless the property's name is a Symbol. Ownership of properties is determined by whether the property belongs to the object directly and not to its prototype chain. Properties of an object can also be retrieved in total. There are a number of built-in means of detecting, iterating/enumerating, and retrieving object properties, with the chart showing which are available. Some sample code follows which demonstrates how to obtain the missing categories.
7	Equality comparisons and sameness	Comparison, Equality, Intermediate, JavaScript, SameValue, SameValueZero, Sameness
		Briefly, double equals will perform a type conversion when comparing two things; triple equals will do the same comparison without type conversion (by simply always returning false if the types differ); and Object.is will behave the same way as triple equals, but with special handling for NaN and -0 and +0 so that the last two are not said to be the same, while Object.is(NaN, NaN) will be true. (Comparing NaN with NaN ordinarily—i.e., using either double equals or triple equals—evaluates to false, because IEEE 754 says so.) Do note that the distinction between these all have to do with their handling of primitives; none of them compares whether the parameters are conceptually similar in structure. For any non-primitive objects x and y which have the same structure but are distinct objects themselves, all of the above forms will evaluate to false.
8	Index	Index, JavaScript, MDN Meta
		This page lists all MDN JavaScript pages along with their summary and tags.
9	Inheritance and the prototype chain	Inheritance, Intermediate, JavaScript, OOP
		JavaScript is a bit confusing for developers experienced in class-based languages (like Java or C++), as it is dynamic and does not provide a class implementation per se (the class keyword is introduced in ES6, but is syntactical sugar, JavaScript remaining prototype-based).
10	Introduction to Object-Oriented JavaScript	Constructor, Encapsulation, Inheritance, Intermediate, JavaScript, Members, Namespace, OOP, Object, Object-Oriented
		Object-oriented to the core, JavaScript features powerful, flexible OOP capabilities. This article starts with an introduction to object-oriented programming, then reviews the JavaScript object model, and finally demonstrates concepts of object-oriented programming in JavaScript. This article does not describe the newer syntax for object-oriented programming in ECMAScript 6.
11	JavaScript Guide	Guide, JavaScript, l10n:priority
		The JavaScript Guide shows you how to use JavaScript and gives an overview of the language. If you want to get started with JavaScript or programming in general, consult the articles in the learning area. If you need exhaustive information about a language feature, have a look at the JavaScript reference.
12	Control flow and error handling	Beginner, Guide, JavaScript, beginner, guide
		JavaScript supports a compact set of statements, specifically control flow statements, that you can use to incorporate a great deal of interactivity in your application. This chapter provides an overview of these statements.
13	Details of the object model	Guide, Intermediate, JavaScript, Javascript, Object, guide, javascript
		JavaScript is an object-based language based on prototypes, rather than being class-based. Because of this different basis, it can be less apparent how JavaScript allows you to create hierarchies of objects and to have inheritance of properties and their values. This chapter attempts to clarify the situation.
14	Expressions and operators	Beginner, Expressions, Guide, JavaScript, Operators, beginner
		This chapter describes JavaScript's expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ternary and more.
15	Functions	Beginner, Functions, Guide, JavaScript, beginner, guide
		Functions are one of the fundamental building blocks in JavaScript. A function is a JavaScript procedure—a set of statements that performs a task or calculates a value. To use a function, you must define it somewhere in the scope from which you wish to call it.
16	Grammar and types	Guide, JavaScript, guide
		This chapter discusses JavaScript's basic grammar, variable declarations, data types and literals.
17	Indexed collections	Guide, JavaScript, Method, guide
		This chapter introduces collections of data which are ordered by an index value. This includes arrays and array-like constructs such as Array objects and TypedArray objects.
18	Introduction	Guide, JavaScript
		This chapter introduces JavaScript and discusses some of its fundamental concepts.
19	Iterators and generators	Guide, Intermediate, JavaScript
		Processing each of the items in a collection is a very common operation. JavaScript provides a number of ways of iterating over a collection, from simple for loops to map() and filter(). Iterators and Generators bring the concept of iteration directly into the core language and provide a mechanism for customizing the behavior of for...of loops.
20	Keyed collections	Collections, Guide, JavaScript, Map, set
		This chapter introduces collections of data which are ordered by a key; Map and Set objects contain elements which are iterable in the order of insertion.
21	Loops and iteration	Guide, JavaScript, Loop, Syntax, loop
		Loops offer a quick and easy way to do something repeatedly. This chapter of the JavaScript Guide introduces the different iteration statements available to JavaScript.
22	Meta programming	Guide, JavaScript, Proxy, Reflect
		Starting with ECMAScript 6, JavaScript gains support for the Proxy and Reflect objects allowing you to intercept and define custom behavior for fundamental language operations (e.g. property lookup, assignment, enumeration, function invocation, etc). With the help of these two objects you are able to program at the meta level of JavaScript.
23	Numbers and dates	Guide, JavaScript
		This chapter introduces how to work with numbers and dates in JavaScript.
24	Regular Expressions	Guide, Intermediate, JavaScript, Reference, RegExp, Regular Expressions, regex
		Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects. These patterns are used with the exec and test methods of RegExp, and with the match, replace, search, and split methods of String. This chapter describes JavaScript regular expressions.
25	Text formatting	Guide, JavaScript
		This chapter introduces how to work with strings and text in JavaScript.
26	Working with objects	Beginner, Comparing object, Constructor, Document, Guide, JavaScript, Object, beginner
		JavaScript is designed on a simple object-based paradigm. An object is a collection of properties, and a property is an association between a name (or key) and a value. A property's value can be a function, in which case the property is known as a method. In addition to objects that are predefined in the browser, you can define your own objects. This chapter describes how to use objects, properties, functions, and methods, and how to create your own objects.
27	JavaScript data types and data structures	Beginner, JavaScript, Types, beginner
		Programming languages all have built-in data structures, but these often differ from one language to another. This article attempts to list the built-in data structures available in JavaScript and what properties they have; these can be used to build other data structures. When possible, comparisons with other languages are drawn.
28	JavaScript language resources	Advanced, JavaScript
		ECMAScript is the scripting language that forms the basis of JavaScript. ECMAScript is standardized by the ECMA International standards organization in the ECMA-262 and ECMA-402 specifications. The following ECMAScript standards have been approved or are being worked on:
29	JavaScript reference	JavaScript
		This part of the JavaScript section on MDN serves as a repository of facts about the JavaScript language. Read more about this reference.
30	About this reference	JavaScript
		The JavaScript reference serves as a repository of facts about the JavaScript language. The entire language is described here in detail. As you write JavaScript code, you'll refer to these pages often (thus the title "JavaScript reference"). If you're learning JavaScript, or need help understanding some of its capabilities or features, check out the JavaScript guide.
31	Classes	Classes, Constructors, ECMAScript6, Inheritance, Intermediate, JavaScript
		JavaScript classes are introduced in ECMAScript 6 and are syntactical sugar over JavaScript's existing prototype-based inheritance. The class syntax is not introducing a new object-oriented inheritance model to JavaScript. JavaScript classes provide a much simpler and clearer syntax to create objects and deal with inheritance.
32	constructor	Classes, ECMAScript6, JavaScript
		The constructor method is a special method for creating and initializing an object created with a class.
33	extends	Classes, ECMAScript6, JavaScript
		The extends keyword is used in a class declarations or class expressions to create a class with a child of another class.
34	static	Classes, ECMAScript6, JavaScript
		The static keyword defines a static method for a class.
35	Deprecated and obsolete features	Deprecated, JavaScript, Obsolete
		This page lists features of JavaScript that are deprecated (that is, still available but planned for removal) and obsolete (that is, no longer usable).
36	The legacy Iterator protocol	JavaScript, Javascript, Legacy Iterator, javascript
		Firefox, prior to version 26 implemented another iterator protocol that is similar to the standard ES2015 Iterator protocol.
37	Expressions and operators	JavaScript, Operators
		This chapter documents all the JavaScript language operators, expressions and keywords.
38	Arithmetic operators	JavaScript, Operator, operator
		Arithmetic operators take numerical values (either literals or variables) as their operands and return a single numerical value. The standard arithmetic operators are addition (+), subtraction (-), multiplication (*), and division (/).
39	Array comprehensions	JavaScript, Non-standard, Operator, Reference, operator
		The array comprehension syntax is a JavaScript expression which allows you to quickly assemble a new array based on an existing one. Comprehensions exist in many programming languages.
40	Assignment operators	JavaScript, Operator, operator
		An assignment operator assigns a value to its left operand based on the value of its right operand.
41	Bitwise operators	JavaScript, Operator, Reference, operator
		Bitwise operators treat their operands as a sequence of 32 bits (zeroes and ones), rather than as decimal, hexadecimal, or octal numbers. For example, the decimal number nine has a binary representation of 1001. Bitwise operators perform their operations on such binary representations, but they return standard JavaScript numerical values.
42	Comma operator	JavaScript, Operator, operator
		The comma operator evaluates each of its operands (from left to right) and returns the value of the last operand.
43	Comparison operators	JavaScript, Operator, Reference, operator
		JavaScript has both strict and type–converting comparisons. A strict comparison (e.g., ===) is only true if the operands are of the same type and the contents match. The more commonly-used abstract comparison (e.g. ==) converts the operands to the same type before making the comparison. For relational abstract comparisons (e.g., <=), the operands are first converted to primitives, then to the same type, before comparison.
44	Conditional (ternary) Operator	JavaScript, Operator, operator
		The conditional (ternary) operator is the only JavaScript operator that takes three operands. This operator is frequently used as a shortcut for the if statement.
45	Destructuring assignment	Destructuring, ECMAScript6, JavaScript, Operator, operator
		The destructuring assignment syntax is a JavaScript expression that makes it possible to extract data from arrays or objects into distinct variables.
46	Expression closures	Functions, JavaScript, Reference
		Expression closures are a shorthand function syntax for writing simple functions.
47	Generator comprehensions	Iterator, JavaScript, Non-standard, Reference
		The generator comprehension syntax is a JavaScript expression which allows you to quickly assemble a new generator function based on an existing iterable object. Comprehensions exist in many programming languages.
48	Grouping operator	JavaScript, Operator, Primary Expressions, operator
		The grouping operator ( ) controls the precedence of evaluation in expressions.
49	Legacy generator function expression	JavaScript, Legacy Iterator, Reference, Référence
		The function keyword can be used to define a legacy generator function inside an expression. To make the function a legacy generator, the function body should contain at least one yield expression.
50	Logical Operators	JavaScript, Operator, operator
		Logical operators are typically used with Boolean (logical) values. When they are, they return a Boolean value. However, the && and || operators actually return the value of one of the specified operands, so if these operators are used with non-Boolean values, they may return a non-Boolean value.
51	Object initializer	ECMAScript 2015, ECMAScript6, JSON, JavaScript, Literal, Methods, Object, Primary Expression, computed, mutation, properties
		Objects can be initialized using new Object(), Object.create(), or using the literal notation (initializer notation). An object initializer is a list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}).
52	Operator precedence	JavaScript, Operator, operator, precedence
		Operator precedence determines the order in which operators are evaluated. Operators with higher precedence are evaluated first.
53	Property accessors	JavaScript, Operator, operator
		Property accessors provide access to an object's properties by using the dot notation or the bracket notation.
54	Spread operator	ECMAScript6, Iterator, JavaScript, Operator, operator
		The spread operator allows an expression to be expanded in places where multiple arguments (for function calls) or multiple elements (for array literals) or multiple variables  (for destructuring assignment) are expected.
55	class expression	Classes, ECMAScript6, Expression, JavaScript, Operator, Reference, operator
		The class expression is one way to define a class in ECMAScript 2015 (ES6). Similar to function expressions, class expressions can be named or unnamed. If named, the name of the class is local the class body only. JavaScript classes are using prototype-based inheritance.
56	delete operator	JavaScript, Operator, Unary, operator
		The delete operator removes a property from an object.
57	function expression	Function, JavaScript, Operator, Primary Expressions, operator
		The function keyword can be used to define a function inside an expression.
58	function* expression	ECMAScript6, Function, Iterator, JavaScript, Operator, Primary Expression, operator
		The function* keyword can be used to define a generator function inside an expression.
59	in operator	JavaScript, Operator, Relational Operators, operator
		The in operator returns true if the specified property is in the specified object.
60	instanceof	JavaScript, Object, Operator, Prototype, Relational Operators, instanceof, operator, prototype
		The instanceof operator tests whether an object has in its prototype chain the prototype property of a constructor.
61	new operator	JavaScript, Left-hand-side expressions, Operator, operator
		The new operator creates an instance of a user-defined object type or of one of the built-in object types that has a constructor function.
62	new.target	Classes, ECMAScript6, JavaScript, Reference
		The new.target property lets you detect whether a function or constructor was called using the new operator. In constructors and functions instantiated with the new operator, new.target returns a reference to the constructor or function. In normal function calls, new.target is undefined.
63	super	Classes, ECMAScript6, JavaScript, Left-hand-side expressions, Operator, operator
		The super keyword is used to call functions on an object's parent.
64	this	JavaScript, Operator, Primary Expressions, Reference, operator
		A function's this keyword behaves a little differently in JavaScript compared to other languages. It also has some differences between strict mode and non-strict mode.
65	typeof	JavaScript, Operator, Unary, operator
		The typeof operator returns a string indicating the type of the unevaluated operand.
66	void operator	JavaScript, Operator, Unary, operator
		The void operator evaluates the given expression and then returns undefined.
67	yield	ECMAScript6, Generators, Iterator, JavaScript, Operator, operator
		The yield keyword is used to pause and resume a generator function (function* or legacy generator function).
68	yield*	ECMAScript6, Generators, Iterable, Iterator, JavaScript, Operator, Reference, operator
		The yield* expression is used to delegate to another generator or iterable object.
69	Functions	Function, Functions, JavaScript
		Generally speaking, a function is a "subprogram" that can be called by code external (or internal in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function, and the function will return a value.
70	Arguments object	Functions, JavaScript, Javascript, arguments, javascript
		The arguments object is an Array-like object corresponding to the arguments passed to a function.
71	arguments.callee	Deprecated, Functions, JavaScript, Property, arguments
		The arguments.callee property contains the currently executing function.
72	arguments.caller	Functions, JavaScript, Obsolete, Property, arguments
		The obsolete arguments.caller property used to provide the function that invoked the currently executing function. This property has been removed and no longer works.
73	arguments.length	Functions, JavaScript, Property, arguments
		The arguments.length property contains the number of arguments passed to the function.
74	arguments[@@iterator]()	Deprecated, Functions, JavaScript, Property, arguments
		The initial value of the @@iterator property is the same function object as the initial value of the Array.prototype.values property.
75	Arrow functions	ECMAScript6, Functions, Intermediate, JavaScript, Reference
		An arrow function expression has a shorter syntax compared to function expressions and lexically binds the this value (does not bind its own this, arguments, super, or new.target). Arrow functions are always anonymous.
76	Default parameters	ECMAScript6, Functions, JavaScript
		Default function parameters allow formal parameters to be initialized with default values if no value or undefined is passed.
77	Method definitions	ECMAScript6, Functions, JavaScript, Object, Syntax
		Starting with ECMAScript 2015 (ES6), a shorter syntax for method definitions on objects initializers is introduced. It is a shorthand for a function assigned to the method's name.
78	Rest parameters	Functions, JavaScript, Rest, Rest parameters
		The rest parameter syntax allows us to represent an indefinite number of arguments as an array.
79	getter	ECMAScript5, ECMAScript6, Functions, JavaScript
		The get syntax binds an object property to a function that will be called when that property is looked up.
80	setter	ECMAScript5, Functions, JavaScript
		The set syntax binds an object property to a function to be called when there is an attempt to set that property.
81	Iteration protocols	ECMAScript6, Intermediate, Iterable, Iterator, JavaScript
		One addition of ECMAScript 2015 (ES6) is not new syntax or a new built-in, but a protocol. This protocol can be implemented by any object respecting some conventions.
82	JavaScript error reference	JavaScript
		Errors, errors everywhere.
83	RangeError: argument is not a valid code point	Errors, JavaScript, RangeError
		RangeError
84	RangeError: invalid array length	Errors, JavaScript, RangeError
		RangeError
85	RangeError: precision is out of range	Errors, JavaScript, RangeError
		RangeError
86	RangeError: radix must be an integer	Errors, JavaScript, RangeError
		RangeError
87	RangeError: repeat count must be less than infinity	Errors, JavaScript, RangeError
		RangeError
88	RangeError: repeat count must be non-negative	Errors, JavaScript, RangeError
		RangeError
89	ReferenceError: "x" is not defined	Error, JavaScript, ReferenceError
		ReferenceError.
90	ReferenceError: assignment to undeclared variable "x"	Errors, JavaScript, ReferenceError, Strict Mode
		ReferenceError warning in strict mode only.
91	ReferenceError: deprecated caller or arguments usage	Errors, JavaScript, Strict Mode, Warning
		A strict-mode-only warning that a ReferenceError occurred. JavaScript execution won't be halted.
92	ReferenceError: reference to undefined property "x"	Errors, JavaScript, ReferenceError, Strict Mode
		ReferenceError warning in strict mode only.
93	SyntaxError: JSON.parse: bad parsing	Errors, JSON, JavaScript, SyntaxError
		SyntaxError
94	SyntaxError: Malformed formal parameter	Errors, JavaScript, SyntaxError
		SyntaxError
95	SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead	Errors, JavaScript, Source maps
		A warning that a SyntaxError occurred. JavaScript execution won't be halted.
96	SyntaxError: test for equality (==) mistyped as assignment (=)?	Errors, JavaScript, SyntaxError
		SyntaxError warning in strict mode only.
97	TypeError: "x" is (not) "y"	Errors, JavaScript, TypeError
		TypeError.
98	TypeError: "x" is not a function	Errors, JavaScript, TypeError
		TypeError.
99	TypeError: "x" is read-only	Errors, JavaScript, TypeError
		TypeError
100	TypeError: invalid Array.prototype.sort argument	Errors, JavaScript, TypeError
		TypeError
101	TypeError: property "x" is non-configurable and can't be deleted	Errors, JavaScript, Strict Mode, TypeError
		TypeError in strict mode only.
102	TypeError: variable "x" redeclares argument	Errors, JavaScript, Strict Mode, TypeError
		TypeError warning in strict mode only.
103	Warning: unreachable code after return statement	JavaScript, Warning
		Warning
104	JavaScript methods index	JavaScript
		This article entails a listing of all JavaScript methods documented on MDN sorted alphabetically.
105	JavaScript properties index	JavaScript
		This article entails a listing of all JavaScript properties documented on MDN sorted alphabetically.
106	Lexical grammar	JavaScript, Lexical Grammar
		This page describes JavaScript's lexical grammar. The source text of ECMAScript scripts gets scanned from left to right and is converted into a sequence of input elements which are tokens, control characters, line terminators, comments or white space. ECMAScript also defines certain keywords and literals and has rules for automatic insertion of semicolons to end statements.
107	Standard built-in objects	JavaScript, Reference, Référence
		This chapter documents all of JavaScript's standard, built-in objects, including their methods and properties.
108	Array	Array, Example, Global Objects, JavaScript, Reference
		The JavaScript Array object is a global object that is used in the construction of arrays; which are high-level, list-like objects.
109	Array.from()	Array, ECMAScript6, JavaScript, Method, polyfill
		The Array.from() method creates a new Array instance from an array-like or iterable object.
110	Array.isArray()	Array, ECMAScript5, JavaScript, Method, polyfill
		The Array.isArray() method returns a boolean value. True if an object is an array, false if it is not.
111	Array.observe()	Array, JavaScript, Method, Obsolete
		The Array.observe() method was used for asynchronously observing changes to Arrays, similar to Object.observe() for objects. It provided a stream of changes in order of occurrence. It's equivalent to Object.observe() invoked with the accept type list ["add", "update", "delete", "splice"]. However, this API has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
112	Array.of()	Array, ECMAScript6, JavaScript, Method, polyfill
		The Array.of() method creates a new Array instance with a variable number of arguments, regardless of number or type of the arguments.
113	Array.prototype	Array, JavaScript, Property
		The Array.prototype property represents the prototype for the Array constructor.
114	Array.prototype.concat()	Array, JavaScript, Method, Prototype, prototype
		The concat() method returns a new array comprised of the array on which it is called joined with the array(s) and/or value(s) provided as arguments.
115	Array.prototype.copyWithin()	Array, ECMAScript6, JavaScript, Method, Prototype, polyfill, prototype
		The copyWithin() method shallow copies part of an array to another location in the same array and returns it, without modifying its size.
116	Array.prototype.entries()	Array, ECMAScript6, Iterator, JavaScript, Method, Prototype, prototype
		The entries() method returns a new Array Iterator object that contains the key/value pairs for each index in the array.
117	Array.prototype.every()	Array, ECMAScript5, JavaScript, Method, Prototype, polyfill, prototype
		The every() method tests whether all elements in the array pass the test implemented by the provided function.
118	Array.prototype.fill()	Array, ECMAScript6, JavaScript, Method, Prototype, polyfill, prototype
		The fill() method fills all the elements of an array from a start index to an end index with a static value.
119	Array.prototype.filter()	Array, ECMAScript5, JavaScript, Method, Prototype, Reference, polyfill, prototype
		The filter() method creates a new array with all elements that pass the test implemented by the provided function.
120	Array.prototype.find()	Array, ECMAScript 2015, ECMAScript6, JavaScript, Method, Prototype, polyfill, prototype
		The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned.
121	Array.prototype.findIndex()	Array, ECMAScript6, JavaScript, Method, Prototype, polyfill, prototype
		The findIndex() method returns an index in the array, if an element in the array satisfies the provided testing function. Otherwise -1 is returned.
122	Array.prototype.forEach()	Array, ECMAScript5, JavaScript, Method, Prototype, Reference, prototype
		The forEach() method executes a provided function once per array element.
123	Array.prototype.includes()	Array, JavaScript, Method, Prototype, Reference, polyfill, prototype
		The includes() method determines whether an array includes a certain element, returning true or false as appropriate.
124	Array.prototype.indexOf()	Array, JavaScript, Method, Prototype, Reference, polyfill, prototype
		The indexOf() method returns the first index at which a given element can be found in the array, or -1 if it is not present.
125	Array.prototype.join()	Array, JavaScript, Method, Prototype, Reference, prototype
		The join() method joins all elements of an array into a string.
126	Array.prototype.keys()	Array, ECMAScript6, Iterator, JavaScript, Method, Prototype, prototype
		The keys() method returns a new Array Iterator that contains the keys for each index in the array.
127	Array.prototype.lastIndexOf()	Array, ECMAScript5, JavaScript, Method, Prototype, polyfill, prototype
		The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.
128	Array.prototype.length	Array, JavaScript, Property
		The length property represents an unsigned, 32-bit integer that is always numerically greater than the highest index in the array.
129	Array.prototype.map()	Array, ECMAScript5, JavaScript, Method, Prototype, polyfill, prototype
		The map() method creates a new array with the results of calling a provided function on every element in this array.
130	Array.prototype.pop()	Array, JavaScript, Method, Prototype, prototype
		The pop() method removes the last element from an array and returns that element.
131	Array.prototype.push()	Array, JavaScript, Method, Prototype, Reference, prototype
		The push() method adds one or more elements to the end of an array and returns the new length of the array.
132	Array.prototype.reduce()	Array, ECMAScript5, JavaScript, Method, Prototype, prototype
		The reduce() method applies a function against an accumulator and each value of the array (from left-to-right) to reduce it to a single value.
133	Array.prototype.reduceRight()	Array, ECMAScript5, JavaScript, Method, Prototype, polyfill, prototype
		The reduceRight() method applies a function against an accumulator and each value of the array (from right-to-left) has to reduce it to a single value.
134	Array.prototype.reverse()	Array, JavaScript, Method, Prototype, prototype
		The reverse() method reverses an array in place. The first array element becomes the last and the last becomes the first.
135	Array.prototype.shift()	Array, JavaScript, Method, Prototype, prototype
		The shift() method removes the first element from an array and returns that element. This method changes the length of the array.
136	Array.prototype.slice()	Array, JavaScript, Method, Prototype, prototype
		The slice() method returns a shallow copy of a portion of an array into a new array object.
137	Array.prototype.some()	Array, ECMAScript5, JavaScript, Method, Prototype, Reference, prototype
		The some() method tests whether some element in the array passes the test implemented by the provided function.
138	Array.prototype.sort()	Array, JavaScript, Javascript, Method, Prototype, javascript, prototype
		The sort() method sorts the elements of an array in place and returns the array. The sort is not necessarily stable. The default sort order is according to string Unicode code points.
139	Array.prototype.splice()	Array, JavaScript, Method, Prototype, Reference, prototype
		The splice() method changes the content of an array by removing existing elements and/or adding new elements.
140	Array.prototype.toLocaleString()	Array, Internationalization, JavaScript, Method, Prototype, prototype
		The toLocaleString() method returns a string representing the elements of the array. The elements are converted to Strings using their toLocaleString methods and these Strings are separated by a locale-specific String (such as a comma “,”).
141	Array.prototype.toSource()	Array, JavaScript, Method, Prototype
		The toSource() method returns a string representing the source code of the array.
142	Array.prototype.toString()	Array, JavaScript, Method, Prototype, prototype
		The toString() method returns a string representing the specified array and its elements.
143	Array.prototype.unshift()	Array, JavaScript, Method, Prototype, prototype
		The unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.
144	Array.prototype.values()	Array, ECMAScript6, Iterator, JavaScript, Method, Prototype, prototype
		The values() method returns a new Array Iterator object that contains the values for each index in the array.
145	Array.prototype[@@iterator]()	Array, ECMAScript6, Iterator, JavaScript, Method, Prototype, Reference, prototype
		The initial value of the @@iterator property is the same function object as the initial value of the values() property.
146	Array.prototype[@@unscopables]	Array, ECMAScript6, JavaScript, Property, Prototype, prototype
		The @@unscopable symbol property contains property names that were not included in the ECMAScript standard prior to the ES2015 (ES6) version. These properties are excluded from with statement bindings.
147	Array.unobserve()	Array, JavaScript, Method, Obsolete
		The Array.unobserve() method was used to remove observers set by Array.observe(), but has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
148	get Array[@@species]	Array, JavaScript, Method, Prototype, prototype
		The Array[@@species] accessor property returns the Array constructor.
149	ArrayBuffer	ArrayBuffer, Constructor, JavaScript, TypedArrays
		The ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. You can not directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object which represents the buffer in a specific format, and use that to read and write the contents of the buffer.
150	ArrayBuffer.isView()	ArrayBuffer, JavaScript, Method, TypedArrays
		The ArrayBuffer.isView() method returns true if arg is one of the ArrayBuffer views, such as typed array objects or a DataView; false otherwise.
151	ArrayBuffer.prototype	ArrayBuffer, JavaScript, Property
		The ArrayBuffer.prototype property represents the prototype for the ArrayBuffer object.
152	ArrayBuffer.prototype.byteLength	ArrayBuffer, JavaScript, Property, Prototype, prototype
		The byteLength accessor property represents the length of an ArrayBuffer in bytes.
153	ArrayBuffer.prototype.slice()	ArrayBuffer, JavaScript, Method, Prototype, prototype
		The slice() method returns a new ArrayBuffer whose contents are a copy of this ArrayBuffer's bytes from begin, inclusive, up to end, exclusive.
154	ArrayBuffer.transfer()	ArrayBuffer, Experimental, JavaScript, Method, Reference, TypedArrays
		The static ArrayBuffer.transfer() method returns a new ArrayBuffer whose contents are taken from the oldBuffer's data and then is either truncated or zero-extended by newByteLength. If newByteLength is undefined, the byteLength of the oldBuffer is used. This operation leaves oldBuffer in a detached state.
155	get ArrayBuffer[@@species]	ArrayBuffer, JavaScript, Method, TypedArrays
		The ArrayBuffer[@@species] accessor property returns the ArrayBuffer constructor.
156	Atomics	Atomics, Experimental, JavaScript, Shared Memory
		The Atomics object provides atomic operations as static methods. They are used with SharedArrayBuffer objects.
157	Atomics.add()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.add() method adds a given value at a given position in the array and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
158	Atomics.and()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.and() method computes a bitwise AND with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
159	Atomics.compareExchange()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.compareExchange() method exchanges a given replacement value at a given position in the array, and returns the old value at that position, if a given expected value equals the old value. This atomic operation guarantees that no other write happens until the modified value is written back.
160	Atomics.exchange()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.exchange() method exchanges a given value at a given position in the array and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
161	Atomics.isLockFree()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.isLockFree() method is used to determine whether to use locks or atomic operations. It returns true, if the given size is one of the BYTES_PER_ELEMENT property of integer TypedArray types.
162	Atomics.load()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.load() method returns a value at a given position in the array. This atomic operation guarantees that no other read happens until the modified value is read back.
163	Atomics.or()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.or() method computes a bitwise OR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
164	Atomics.store()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.store() method stores a given value at the given position in the array and returns that value. This atomic operation guarantees that no other write happens until the modified value is written back.
165	Atomics.sub()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.sub() method substracts a given value at a given position in the array and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
166	Atomics.wait()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.wait() method verifies that a given position in an Int32Array still contains a given value and sleeps awaiting or times out. It returns a string which is either "ok", "not-equal", or "timed-out".
167	Atomics.wake()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.wake() method wakes up some agents that are sleeping in the wait queue.
168	Atomics.xor()	Atomics, Experimental, JavaScript, Method, Shared Memory
		The static Atomics.xor() method computes a bitwise XOR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.
169	Boolean	Boolean, Constructor, JavaScript
		The Boolean object is an object wrapper for a boolean value.
170	Boolean.prototype	Boolean, JavaScript, Property, Prototype, prototype
		The Boolean.prototype property represents the prototype for the Boolean constructor.
171	Boolean.prototype.toSource()	Boolean, JavaScript, Method, Prototype
		The toSource() method returns a string representing the source code of the object.
172	Boolean.prototype.toString()	Boolean, JavaScript, Method, Prototype, prototype
		The toString() method returns a string representing the specified Boolean object.
173	Boolean.prototype.valueOf()	Boolean, JavaScript, Method, Prototype, prototype
		The valueOf() method returns the primitive value of a Boolean object.
174	DataView	Constructor, DataView, JavaScript, TypedArrays
		The DataView view provides a low-level interface for reading and writing multiple number types in an ArrayBuffer irrespective of the platform's endianness.
175	DataView.prototype	DataView, JavaScript, Property
		The DataView.prototype property represents the prototype for the DataView object.
176	DataView.prototype.buffer	DataView, JavaScript, Property, Prototype, TypedArrays, prototype
		The buffer accessor property represents the ArrayBuffer referenced by the DataView at construction time.
177	DataView.prototype.byteLength	DataView, JavaScript, Property, Prototype, TypedArrays, prototype
		The byteLength accessor property represents the length (in bytes) of this view from the start of its ArrayBuffer.
178	DataView.prototype.byteOffset	DataView, JavaScript, Property, Prototype, TypedArrays, prototype
		The byteOffset accessor property represents the offset (in bytes) of this view from the start of its ArrayBuffer.
179	DataView.prototype.getFloat32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getFloat32() method gets a signed 32-bit float (float) at the specified byte offset from the start of the DataView.
180	DataView.prototype.getFloat64()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getFloat64() method gets a signed 64-bit float (double) at the specified byte offset from the start of the DataView.
181	DataView.prototype.getInt16()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getInt16() method gets a signed 16-bit integer (short) at the specified byte offset from the start of the DataView.
182	DataView.prototype.getInt32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getInt32() method gets a signed 32-bit integer (long) at the specified byte offset from the start of the DataView.
183	DataView.prototype.getInt8()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getInt8() method gets a signed 8-bit integer (byte) at the specified byte offset from the start of the DataView.
184	DataView.prototype.getUint16()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getUint16() method gets an unsigned 16-bit integer (unsigned short) at the specified byte offset from the start of the DataView.
185	DataView.prototype.getUint32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getUint32() method gets an unsigned 32-bit integer (unsigned long) at the specified byte offset from the start of the DataView.
186	DataView.prototype.getUint8()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The getUint8() method gets an unsigned 8-bit integer (unsigned byte) at the specified byte offset from the start of the DataView.
187	DataView.prototype.setFloat32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setFloat32() method stores a signed 32-bit float (float) value at the specified byte offset from the start of the DataView.
188	DataView.prototype.setFloat64()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setFloat64() method stores a signed 64-bit float (double) value at the specified byte offset from the start of the DataView.
189	DataView.prototype.setInt16()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setInt16() method stores a signed 16-bit integer (short) value at the specified byte offset from the start of the DataView.
190	DataView.prototype.setInt32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setInt32() method stores a signed 32-bit integer (long) value at the specified byte offset from the start of the DataView.
191	DataView.prototype.setInt8()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setInt8() method stores a signed 8-bit integer (byte) value at the specified byte offset from the start of the DataView.
192	DataView.prototype.setUint16()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setUint16() method stores an unsigned 16-bit integer (unsigned short) value at the specified byte offset from the start of the DataView.
193	DataView.prototype.setUint32()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setUint32() method stores an unsigned 32-bit integer (unsigned long) value at the specified byte offset from the start of the DataView.
194	DataView.prototype.setUint8()	DataView, JavaScript, Method, Prototype, TypedArrays, prototype
		The setUint8() method stores an unsigned 8-bit integer (byte) value at the specified byte offset from the start of the DataView.
195	Date	Date, JavaScript
		Creates a JavaScript Date instance that represents a single moment in time. Date objects are based on a time value that is the number of milliseconds since 1 January, 1970 UTC.
196	Date.UTC()	Date, JavaScript, Method, Reference
		The Date.UTC() method accepts the same parameters as the longest form of the constructor, and returns the number of milliseconds in a Date object since January 1, 1970, 00:00:00, universal time.
197	Date.now()	Date, JavaScript, Method, Reference, polyfill
		The Date.now() method returns the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.
198	Date.parse()	Date, JavaScript, Method, Reference
		The Date.parse() method parses a string representation of a date, and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC or NaN if the string is unrecognised or, in some cases, contains illegal date values (e.g. 2015-02-31).
199	Date.prototype	Date, JavaScript, Property, Prototype, Reference, prototype
		The Date.prototype property represents the prototype for the Date constructor.
200	Date.prototype.getDate()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getDate() method returns the day of the month for the specified date according to local time.
201	Date.prototype.getDay()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getDay() method returns the day of the week for the specified date according to local time, where 0 represents Sunday.
202	Date.prototype.getFullYear()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getFullYear() method returns the year of the specified date according to local time.
203	Date.prototype.getHours()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getHours() method returns the hour for the specified date, according to local time.
204	Date.prototype.getMilliseconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getMilliseconds() method returns the milliseconds in the specified date according to local time.
205	Date.prototype.getMinutes()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getMinutes() method returns the minutes in the specified date according to local time.
206	Date.prototype.getMonth()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getMonth() method returns the month in the specified date according to local time, as a zero-based value (where zero indicates the first month of the year).
207	Date.prototype.getSeconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getSeconds() method returns the seconds in the specified date according to local time.
208	Date.prototype.getTime()	Date, JavaScript, Method, Prototype, Reference, Référence, prototype
		The getTime() method returns the numeric value corresponding to the time for the specified date according to universal time.
209	Date.prototype.getTimezoneOffset()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getTimezoneOffset() method returns the time-zone offset from UTC, in minutes, for the current locale.
210	Date.prototype.getUTCDate()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCDate() method returns the day (date) of the month in the specified date according to universal time.
211	Date.prototype.getUTCDay()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCDay() method returns the day of the week in the specified date according to universal time, where 0 represents Sunday.
212	Date.prototype.getUTCFullYear()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCFullYear() method returns the year in the specified date according to universal time.
213	Date.prototype.getUTCHours()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCHours() method returns the hours in the specified date according to universal time.
214	Date.prototype.getUTCMilliseconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCMilliseconds() method returns the milliseconds in the specified date according to universal time.
215	Date.prototype.getUTCMinutes()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCMinutes() method returns the minutes in the specified date according to universal time.
216	Date.prototype.getUTCMonth()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCMonth() returns the month of the specified date according to universal time, as a zero-based value (where zero indicates the first month of the year).
217	Date.prototype.getUTCSeconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The getUTCSeconds() method returns the seconds in the specified date according to universal time.
218	Date.prototype.getYear()	Date, Deprecated, JavaScript, Method, Prototype, Reference, prototype
		The getYear() method returns the year in the specified date according to local time. Because getYear() does not return full years ("year 2000 problem"), it is no longer used and has been replaced by the getFullYear() method.
219	Date.prototype.setDate()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setDate() method sets the day of the Date object relative to the beginning of the currently set month.
220	Date.prototype.setFullYear()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setFullYear() method sets the full year for a specified date according to local time. Returns new timestamp.
221	Date.prototype.setHours()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setHours() method sets the hours for a specified date according to local time, and returns the number of milliseconds since 1 January 1970 00:00:00 UTC until the time represented by the updated Date instance.
222	Date.prototype.setMilliseconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setMilliseconds() method sets the milliseconds for a specified date according to local time.
223	Date.prototype.setMinutes()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setMinutes() method sets the minutes for a specified date according to local time.
224	Date.prototype.setMonth()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setMonth() method sets the month for a specified date according to the currently set year.
225	Date.prototype.setSeconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setSeconds() method sets the seconds for a specified date according to local time.
226	Date.prototype.setTime()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setTime() method sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC.
227	Date.prototype.setUTCDate()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCDate() method sets the day of the month for a specified date according to universal time.
228	Date.prototype.setUTCFullYear()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCFullYear() method sets the full year for a specified date according to universal time.
229	Date.prototype.setUTCHours()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCHours() method sets the hour for a specified date according to universal time, and returns the number of milliseconds since 1 January 1970 00:00:00 UTC until the time represented by the updated Date instance.
230	Date.prototype.setUTCMilliseconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCMilliseconds() method sets the milliseconds for a specified date according to universal time.
231	Date.prototype.setUTCMinutes()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCMinutes() method sets the minutes for a specified date according to universal time.
232	Date.prototype.setUTCMonth()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCMonth() method sets the month for a specified date according to universal time.
233	Date.prototype.setUTCSeconds()	Date, JavaScript, Method, Prototype, Reference, prototype
		The setUTCSeconds() method sets the seconds for a specified date according to universal time.
234	Date.prototype.setYear()	Date, Deprecated, JavaScript, Method, Prototype, Reference, prototype
		The setYear() method sets the year for a specified date according to local time. Because setYear() does not set full years ("year 2000 problem"), it is no longer used and has been replaced by the setFullYear() method.
235	Date.prototype.toDateString()	Date, JavaScript, Method, Prototype, Reference, prototype
		The toDateString() method returns the date portion of a Date object in human readable form in American English.
236	Date.prototype.toGMTString()	Date, Deprecated, JavaScript, Method, Prototype, Reference, prototype
		The toGMTString() method converts a date to a string, using Internet Greenwich Mean Time (GMT) conventions. The exact format of the value returned by toGMTString() varies according to the platform and browser, in general it should represent a human readable date string.
237	Date.prototype.toISOString()	Date, JavaScript, Method, Prototype, Reference, polyfill, prototype
		The toISOString() method returns a string in simplified extended ISO format (ISO 8601), which is always 24 characters long: YYYY-MM-DDTHH:mm:ss.sssZ. The timezone is always zero UTC offset, as denoted by the suffix "Z".
238	Date.prototype.toJSON()	Date, JavaScript, Method, Prototype, Reference, prototype
		The toJSON() method returns a string representation of the Date object.
239	Date.prototype.toLocaleDateString()	Date, Internationalization, JavaScript, Method, Prototype, Reference, prototype
		The toLocaleDateString() method returns a string with a language sensitive representation of the date portion of this date. The new locales and options arguments let applications specify the language whose formatting conventions should be used and allow to customize the behavior of the function. In older implementations, which ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation dependent.
240	Date.prototype.toLocaleFormat()	Date, JavaScript, Method, Prototype, Reference
		The non-standard toLocaleFormat() method converts a date to a string using the specified formatting. Intl.DateTimeFormat is an alternative to format dates in a standards-compliant way. See also the newer version of Date.prototype.toLocaleDateString().
241	Date.prototype.toLocaleString()	Date, Internationalization, JavaScript, Method, Prototype, Reference, prototype
		The toLocaleString() method returns a string with a language sensitive representation of this date. The new locales and options arguments let applications specify the language whose formatting conventions should be used and customize the behavior of the function. In older implementations, which ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation dependent.
242	Date.prototype.toLocaleTimeString()	Date, Internationalization, JavaScript, Method, Prototype, Reference, prototype
		The toLocaleTimeString() method returns a string with a language sensitive representation of the time portion of this date. The new locales and options arguments let applications specify the language whose formatting conventions should be used and customize the behavior of the function. In older implementations, which ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation dependent.
243	Date.prototype.toSource()	Date, JavaScript, Method, Prototype, Reference
		The toSource() method returns a string representing the source code of the object.
244	Date.prototype.toString()	Date, JavaScript, Method, Prototype, Reference, prototype
		The toString() method returns a string representing the specified Date object.
245	Date.prototype.toTimeString()	Date, JavaScript, Method, Prototype, Reference, prototype
		The toTimeString() method returns the time portion of a Date object in human readable form in American English.
246	Date.prototype.toUTCString()	Date, JavaScript, Method, Prototype, Reference, prototype
		The toUTCString() method converts a date to a string, using the UTC time zone.
247	Date.prototype.valueOf()	Date, JavaScript, Method, Prototype, Reference, prototype
		The valueOf() method returns the primitive value of a Date object.
248	Date.prototype[@@toPrimitive]	Date, JavaScript, Method, Prototype, Reference, prototype
		The [@@toPrimitive]() method converts a Date object to a primitive value.
249	Error	Error, JavaScript, Reference
		The Error constructor creates an error object. Instances of Error objects are thrown when runtime errors occur. The Error object can also be used as a base object for user-defined exceptions. See below for standard built-in error types.
250	Error.prototype	Error, JavaScript, Property
		The Error.prototype property represents the prototype for the Error constructor.
251	Error.prototype.columnNumber	Error, JavaScript, Property, Prototype
		The columnNumber property contains the column number in the line of the file that raised this error.
252	Error.prototype.fileName	Error, JavaScript, Property, Prototype
		The fileName property contains the path to the file that raised this error.
253	Error.prototype.lineNumber	Error, JavaScript, Property, Prototype, Reference, prototype
		The lineNumber property contains the line number in the file that raised this error.
254	Error.prototype.message	Error, JavaScript, Property, Prototype, prototype
		The message property is a human-readable description of the error.
255	Error.prototype.name	Error, JavaScript, Property, Prototype, prototype
		The name property represents a name for the type of error. The initial value is "Error".
256	Error.prototype.stack	Error, JavaScript, Property, Prototype, Reference, prototype
		The non-standard stack property of Error objects offer a trace of which functions were called, in what order, from which line and file, and with what arguments. The stack string proceeds from the most recent calls to earlier ones, leading back to the original global scope call.
257	Error.prototype.toSource()	Error, JavaScript, Method, Prototype
		The toSource() method returns code that could eval to the same error.
258	Error.prototype.toString()	Error, JavaScript, Method, Prototype, prototype
		The toString() method returns a string representing the specified Error object.
259	EvalError	Error, EvalError, JavaScript, Reference
		The EvalError object indicates an error regarding the global eval() function. This exception is not thrown by JavaScript anymore, however the EvalError object remains for compatibility.
260	EvalError.prototype	Error, EvalError, JavaScript, Property
		The EvalError.prototype property represents the prototype of the EvalError constructor.
261	Float32Array	Constructor, JavaScript, TypedArray, TypedArrays
		The Float32Array typed array represents an array of 32-bit floating point numbers (corresponding to the C float data type) in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
262	Float64Array	Constructor, JavaScript, TypedArray, TypedArrays
		The Float64Array typed array represents an array of 64-bit floating point numbers (corresponding to the C double data type) in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
263	Function	Constructor, Function, JavaScript
		The Function constructor creates a new Function object. In JavaScript every function is actually a Function object.
264	Function.arguments	Deprecated, Function, JavaScript, Property, arguments
		The function.arguments property refers to an an array-like object corresponding to the arguments passed to a function. Use the simple variable arguments instead.
265	Function.arity	Function, JavaScript, Obsolete, Property, Unimplemented
		The arity property used to return the number of arguments expected by the function, however, it no longer exists and has been replaced by the Function.prototype.length property.
266	Function.caller	Function, JavaScript, Property
		The function.caller property returns the function that invoked the specified function.
267	Function.displayName	Function, JavaScript, Property
		The function.displayName property returns the display name of the function.
268	Function.length	Function, JavaScript, Property
		The length property specifies the number of arguments expected by the function.
269	Function.name	ECMAScript6, Function, JavaScript, Property
		The function.name property returns the name of the function.
270	Function.prototype	Function, JavaScript, Property, Prototype, prototype
		The Function.prototype property represents the Function prototype object.
271	Function.prototype.apply()	Function, JavaScript, Method
		The apply() method calls a function with a given this value and arguments provided as an array (or an array-like object).
272	Function.prototype.bind()	ECMAScript5, Function, JavaScript, Method, polyfill
		The bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called.
273	Function.prototype.call()	Function, JavaScript, Method
		The call() method calls a function with a given this value and arguments provided individually.
274	Function.prototype.isGenerator()	Function, JavaScript, Method
		The isGenerator() method determines whether or not a function is a generator.
275	Function.prototype.toSource()	Function, JavaScript, Method
		The toSource() method returns a string representing the source code of the object.
276	Function.prototype.toString()	Function, JavaScript, Method, Prototype, prototype
		The toString() method returns a string representing the source code of the function.
277	Generator	ECMAScript6, Generator, JavaScript, Legacy Generator, Legacy Iterator, Reference
		The Generator object is returned by a generator function and it conforms to both the iterable protocol and the iterator protocol.
278	Generator.prototype.next()	ECMAScript6, Generator, JavaScript, Method, Prototype, Reference, prototype
		The next() method returns an object with two properties done and value. You can also provide a parameter to the next method to send a value to the generator.
279	Generator.prototype.return()	ECMAScript6, Generator, JavaScript, Method, Prototype, Reference, prototype
		The return() method returns the given value and finishes the generator.
280	Generator.prototype.throw()	ECMAScript6, Generator, JavaScript, Method, Prototype, Reference, prototype
		The throw() method resumes the execution of a generator by throwing an error into it and returns an object with two properties done and value.
281	GeneratorFunction	Constructor, ECMAScript6, GeneratorFunction, Iterator, JavaScript, Reference
		The GeneratorFunction constructor creates a new generator function object. In JavaScript every generator function is actually a GeneratorFunction object.
282	GeneratorFunction.prototype	ECMAScript6, GeneratorFunction, Iterator, JavaScript, Property, Prototype, Reference, prototype
		The GeneratorFunction.prototype property represents the GeneratorFunction prototype object.
283	Infinity	JavaScript
		The global Infinity property is a numeric value representing infinity.
284	Int16Array	Constructor, JavaScript, TypedArray, TypedArrays
		The Int16Array typed array represents an array of twos-complement 16-bit signed integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
285	Int32Array	Constructor, JavaScript, TypedArray, TypedArrays
		The Int32Array typed array represents an array of twos-complement 32-bit signed integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
286	Int8Array	Constructor, Int8Array, JavaScript, TypedArray, TypedArrays
		The Int8Array typed array represents an array of twos-complement 8-bit signed integers. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
287	InternalError	Error, InternalError, JavaScript
		The InternalError object indicates an error that occurred internally in the JavaScript engine. For example: "InternalError: too much recursion".
288	InternalError.prototype	Error, InternalError, JavaScript, Property
		The InternalError.prototype property represents the prototype of the InternalError constructor.
289	Intl	Internationalization, JavaScript, Javascript, javascript
		The Intl object is the namespace for the ECMAScript Internationalization API, which provides language sensitive string comparison, number formatting, and date and time formatting. The constructors for Collator, NumberFormat, and DateTimeFormat objects are properties of the Intl object. This page documents these properties as well as functionality common to the internationalization constructors and other language sensitive functions.
290	Intl.getCanonicalLocales()	Internationalization, Intl, JavaScript, Method
		The Intl.getCanonicalLocales() method returns an array containing the canonical locale names. Duplicates will be omitted and elements will be validated as structurally valid language tags.
291	Intl.Collator	Collator, Internationalization, JavaScript
		The Intl.Collator object is a constructor for collators, objects that enable language sensitive string comparison.
292	Intl.Collator.prototype	Collator, Internationalization, JavaScript, Property, Prototype, prototype
		The Intl.Collator.prototype property represents the prototype object for the Intl.Collator constructor.
293	Intl.Collator.prototype.compare	Collator, Internationalization, JavaScript, Property, Prototype, prototype
		The Intl.Collator.prototype.compare property returns a getter function that compares two strings according to the sort order of this Collator object.
294	Intl.Collator.prototype.resolvedOptions()	Collator, Internationalization, JavaScript, Method, Prototype, prototype
		The Intl.Collator.prototype.resolvedOptions() method returns a new object with properties reflecting the locale and collation options computed during initialization of this Collator object.
295	Intl.Collator.supportedLocalesOf()	Collator, Internationalization, JavaScript, Method
		The Intl.Collator.supportedLocalesOf() method returns an array containing those of the provided locales that are supported in collation without having to fall back to the runtime's default locale.
296	Intl.DateTimeFormat	DateTimeFormat, Internationalization, JavaScript
		The Intl.DateTimeFormat object is a constructor for objects that enable language sensitive date and time formatting.
297	Intl.DateTimeFormat.prototype	DateTimeFormat, Internationalization, JavaScript, Property, Prototype, prototype
		The Intl.DateTimeFormat.prototype property represents the prototype object for the Intl.DateTimeFormat constructor.
298	Intl.DateTimeFormat.prototype.format	DateTimeFormat, Internationalization, JavaScript, Property, Prototype, prototype
		The Intl.DateTimeFormat.prototype.format property returns a getter function that formats a date according to the locale and formatting options of this Intl.DateTimeFormat object.
299	Intl.DateTimeFormat.prototype.formatToParts()	DateTimeFormat, Internationalization, Intl, JavaScript, Method, Prototype, prototype
		The Intl.DateTimeFormat.prototype.formatToParts() method allows locale-aware formatting of strings produced by DateTimeFormat formatters.
300	Intl.DateTimeFormat.prototype.resolvedOptions()	DateTimeFormat, Internationalization, JavaScript, Method, Prototype, prototype
		The Intl.DateTimeFormat.prototype.resolvedOptions() method returns a new object with properties reflecting the locale and date and time formatting options computed during initialization of this DateTimeFormat object.
301	Intl.DateTimeFormat.supportedLocalesOf()	DateTimeFormat, Internationalization, JavaScript, Method, Prototype, prototype
		The Intl.DateTimeFormat.supportedLocalesOf() method returns an array containing those of the provided locales that are supported in date and time formatting without having to fall back to the runtime's default locale.
302	Intl.NumberFormat	Internationalization, JavaScript, NumberFormat
		The Intl.NumberFormat object is a constructor for objects that enable language sensitive number formatting.
303	Intl.NumberFormat.prototype	Internationalization, JavaScript, NumberFormat, Property, Prototype, prototype
		The Intl.NumberFormat.prototype property represents the prototype object for the Intl.NumberFormat constructor.
304	Intl.NumberFormat.prototype.format	Internationalization, JavaScript, NumberFormat, Property, Prototype, prototype
		The Intl.NumberFormat.prototype.format property returns a getter function that formats a number according to the locale and formatting options of this NumberFormat object.
305	Intl.NumberFormat.prototype.resolvedOptions()	Internationalization, JavaScript, Method, NumberFormat, Prototype, prototype
		The Intl.NumberFormat.prototype.resolvedOptions() method returns a new object with properties reflecting the locale and number formatting options computed during initialization of this NumberFormat object.
306	Intl.NumberFormat.supportedLocalesOf()	Internationalization, JavaScript, Method, NumberFormat
		The Intl.NumberFormat.supportedLocalesOf() method returns an array containing those of the provided locales that are supported in number formatting without having to fall back to the runtime's default locale.
307	Iterator	Deprecated, JavaScript, Legacy Iterator, Reference
		The Iterator function returns an object which implements legacy iterator protocol and iterates over enumerable properties of an object.
308	JSON	JSON, JavaScript, Object, Reference, Référence, polyfill
		The JSON object contains methods for parsing JavaScript Object Notation (JSON) and converting values to JSON. It can't be called or constructed, and aside from its two method properties it has no interesting functionality of its own.
309	JSON.parse()	ECMAScript5, JSON, JavaScript, Method, Reference
		The JSON.parse() method parses a string as JSON, optionally transforming the value produced by parsing.
310	JSON.stringify()	JSON, JavaScript, Method, Reference, stringify
		The JSON.stringify() method converts a JavaScript value to a JSON string, optionally replacing values if a replacer function is specified, or optionally including only the specified properties if a replacer array is specified.
311	Map	ECMAScript6, JavaScript, Map
		The Map object is a simple key/value map. Any value (both objects and primitive values) may be used as either a key or a value.
312	Map.prototype	ECMAScript6, JavaScript, Map, Property
		Technical review completed.
313	Map.prototype.clear()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The clear() method removes all elements from a Map object.
314	Map.prototype.delete()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The delete() method removes the specified element from a Map object.
315	Map.prototype.entries()	ECMAScript6, Iterator, JavaScript, Map, Method, Prototype, prototype
		The entries() method returns a new Iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.
316	Map.prototype.forEach()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The forEach() method executes a provided function once per each key/value pair in the Map object, in insertion order.
317	Map.prototype.get()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The get() method returns a specified element from a Map object.
318	Map.prototype.has()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The has() method returns a boolean indicating whether an element with the specified key exists or not.
319	Map.prototype.keys()	ECMAScript6, Iterator, JavaScript, Map, Method, Prototype, prototype
		The keys() method returns a new Iterator object that contains the keys for each element in the Map object in insertion order.
320	Map.prototype.set()	ECMAScript6, JavaScript, Map, Method, Prototype, prototype
		The set() method adds a new element with a specified key and value to a Map object.
321	Map.prototype.size	ECMAScript6, JavaScript, Map, Property
		The size accessor property returns the number of elements in a Map object.
322	Map.prototype.values()	ECMAScript6, Iterator, JavaScript, Map, Method, Prototype, prototype
		The values() method returns a new Iterator object that contains the values for each element in the Map object in insertion order.
323	Map.prototype[@@iterator]()	ECMAScript6, Iterator, JavaScript, Map, Method, Prototype, Reference, prototype
		The initial value of the @@iterator property is the same function object as the initial value of the entries property.
324	Map.prototype[@@toStringTag]	ECMAScript6, JavaScript, Map, Property, Prototype, Reference, prototype
		The Map[@@toStringTag] property has an initial value of "Map".
325	get Map[@@species]	ECMAScript6, JavaScript, Map, Property
		The Map[@@species] accessor property returns the Map constructor.
326	Math	JavaScript, Math, Reference
		Math is a built-in object that has properties and methods for mathematical constants and functions. Not a function object.
327	Math.E	JavaScript, Math, Property, Reference
		The Math.E property represents the base of natural logarithms, e, approximately 2.718.
328	Math.LN10	JavaScript, Math, Property, Reference
		The Math.LN10 property represents the natural logarithm of 10, approximately 2.302:
329	Math.LN2	JavaScript, Math, Property, Reference
		The Math.LN2 property represents the natural logarithm of 2, approximately 0.693:
330	Math.LOG10E	JavaScript, Math, Property, Reference
		The Math.LOG10E property represents the base 10 logarithm of e, approximately 0.434:
331	Math.LOG2E	JavaScript, Math, Property, Reference
		The Math.LOG2E property represents the base 2 logarithm of e, approximately 1.442:
332	Math.PI	JavaScript, Math, Property, Reference
		The Math.PI property represents the ratio of the circumference of a circle to its diameter, approximately 3.14159:
333	Math.SQRT1_2	JavaScript, Math, Property, Reference
		The Math.SQRT1_2 property represents the square root of 1/2 which is approximately 0.707:
334	Math.SQRT2	JavaScript, Math, Property, Reference
		The Math.SQRT2 property represents the square root of 2, approximately 1.414:
335	Math.abs()	JavaScript, Math, Method, Reference
		The Math.abs() function returns the absolute value of a number, that is
336	Math.acos()	JavaScript, Math, Method, Reference
		The Math.acos() function returns the arccosine (in radians) of a number, that is
337	Math.acosh()	JavaScript, Math, Method, Reference
		The Math.acosh() function returns the hyperbolic arc-cosine of a number, that is
338	Math.asin()	JavaScript, Math, Method, Reference
		The Math.asin() function returns the arcsine (in radians) of a number, that is
339	Math.asinh()	JavaScript, Math, Method, Reference
		The Math.asinh() function returns the hyperbolic arcsine of a number, that is
340	Math.atan()	JavaScript, Math, Method, Reference
		The Math.atan() function returns the arctangent (in radians) of a number, that is
341	Math.atan2()	JavaScript, Math, Method, Reference
		The Math.atan2() function returns the arctangent of the quotient of its arguments.
342	Math.atanh()	JavaScript, Math, Method, Reference
		The Math.atanh() function returns the hyperbolic arctangent of a number, that is
343	Math.cbrt()	JavaScript, Math, Method, Reference
		The Math.cbrt() function returns the cube root of a number, that is
344	Math.ceil()	JavaScript, Math, Method, Reference
		The Math.ceil() function returns the smallest integer greater than or equal to a given number.
345	Math.clz32()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.clz32() function returns the number of leading zero bits in the 32-bit binary representation of a number.
346	Math.cos()	JavaScript, Math, Method, Reference
		The Math.cos() function returns the cosine of a number.
347	Math.cosh()	JavaScript, Math, Method, Reference
		The Math.cosh() function returns the hyperbolic cosine of a number, that can be expressed using the constant e:
348	Math.exp()	JavaScript, Math, Method, Reference
		The Math.exp() function returns ex, where x is the argument, and e is Euler's number (also known as Napier's constant), the base of the natural logarithms.
349	Math.expm1()	JavaScript, Math, Method, Reference
		The Math.expm1() function returns ex - 1, where x is the argument, and e the base of the natural logarithms.
350	Math.floor()	JavaScript, Math, Method, Reference
		The Math.floor() function returns the largest integer less than or equal to a given number.
351	Math.fround()	JavaScript, Math, Method, Reference
		The Math.fround() function returns the nearest single precision float representation of a number.
352	Math.hypot()	JavaScript, Math, Method, Reference
		The Math.hypot() function returns the square root of the sum of squares of its arguments, that is
353	Math.imul()	JavaScript, Math, Method, Reference
		The Math.imul() function returns the result of the C-like 32-bit multiplication of the two parameters.
354	Math.log()	JavaScript, Math, Method, Reference
		The Math.log() function returns the natural logarithm (base e) of a number, that is
355	Math.log10()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.log10() function returns the base 10 logarithm of a number, that is
356	Math.log1p()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.log1p() function returns the natural logarithm (base e) of 1 + a number, that is
357	Math.log2()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.log2() function returns the base 2 logarithm of a number, that is
358	Math.max()	JavaScript, Math, Method, Reference
		The Math.max() function returns the largest of zero or more numbers.
359	Math.min()	JavaScript, Math, Method, Reference
		The Math.min() function returns the smallest of zero or more numbers.
360	Math.pow()	JavaScript, Math, Method, Reference
		The Math.pow() function returns the base to the exponent power, that is, baseexponent.
361	Math.random()	JavaScript, Math, Method, Reference
		The Math.random() function returns a floating-point, pseudo-random number in the range [0, 1) that is, from 0 (inclusive) up to but not including 1 (exclusive), which you can then scale to your desired range. The implementation selects the initial seed to the random number generation algorithm; it cannot be chosen or reset by the user.
362	Math.round()	JavaScript, Math, Method, Reference
		The Math.round() function returns the value of a number rounded to the nearest integer.
363	Math.sign()	JavaScript, Math, Method, Reference
		The Math.sign() function returns the sign of a number, indicating whether the number is positive, negative or zero.
364	Math.sin()	JavaScript, Math, Method, Reference
		The Math.sin() function returns the sine of a number.
365	Math.sinh()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.sinh() function returns the hyperbolic sine of a number, that can be expressed using the constant e:
366	Math.sqrt()	JavaScript, Math, Method, Reference
		The Math.sqrt() function returns the square root of a number, that is
367	Math.tan()	JavaScript, Math, Method, Reference
		The Math.tan() function returns the tangent of a number.
368	Math.tanh()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.tanh() function returns the hyperbolic tangent of a number, that is
369	Math.trunc()	ECMAScript6, JavaScript, Math, Method, Reference
		The Math.trunc() function returns the integral part of a number by removing any fractional digits.
370	NaN	JavaScript
		The global NaN property is a value representing Not-A-Number.
371	Number	JavaScript, Number, Reference
		The Number JavaScript object is a wrapper object allowing you to work with numerical values. A Number object is created using the Number() constructor.
372	Number.EPSILON	ECMAScript6, JavaScript, Number, Property
		The Number.EPSILON property represents the difference between one and the smallest value greater than one that can be represented as a Number.
373	Number.MAX_SAFE_INTEGER	ECMAScript6, JavaScript, Number, Property
		The Number.MAX_SAFE_INTEGER constant represents the maximum safe integer in JavaScript (253 - 1).
374	Number.MAX_VALUE	JavaScript, Number, Property
		The Number.MAX_VALUE property represents the maximum numeric value representable in JavaScript.
375	Number.MIN_SAFE_INTEGER	ECMAScript6, JavaScript, Number, Property
		The Number.MIN_SAFE_INTEGER constant represents the minimum safe integer in JavaScript (-(253 - 1)).
376	Number.MIN_VALUE	JavaScript, Number, Property
		The Number.MIN_VALUE property represents the smallest positive numeric value representable in JavaScript.
377	Number.NEGATIVE_INFINITY	JavaScript, Number, Property
		The Number.NEGATIVE_INFINITY property represents the negative Infinity value.
378	Number.NaN	JavaScript, Number, Property
		The Number.NaN property represents Not-A-Number. Equivalent of NaN.
379	Number.POSITIVE_INFINITY	JavaScript, Number, Property
		The Number.POSITIVE_INFINITY property represents the positive Infinity value.
380	Number.isFinite()	JavaScript, Javascript, Method, Number, Reference, javascript
		The Number.isFinite() method determines whether the passed value is a finite number.
381	Number.isInteger()	JavaScript, Method, Number, Reference
		The Number.isInteger() method determines whether the passed value is an integer.
382	Number.isNaN()	ECMAScript6, JavaScript, Method, Number
		The Number.isNaN() method determines whether the passed value is NaN. More robust version of the original global isNaN().
383	Number.isSafeInteger()	ECMAScript6, JavaScript, Method, Number
		The Number.isSafeInteger() method determines whether the provided value is a number that is a safe integer. A safe integer is an integer that
384	Number.parseFloat()	ECMAScript6, JavaScript, Method, Number
		The Number.parseFloat() method parses a string argument and returns a floating point number. This method behaves identically to the global function parseFloat() and is part of ECMAScript 6 (its purpose is modularization of globals).
385	Number.parseInt()	ECMAScript6, JavaScript, Method, Number
		The Number.parseInt() method parses a string argument and returns an integer of the specified radix or base.
386	Number.prototype	JavaScript, Number, Property, Prototype, prototype
		The Number.prototype property represents the prototype for the Number constructor.
387	Number.prototype.toExponential()	JavaScript, Method, Number, Prototype, prototype
		The toExponential() method returns a string representing the Number object in exponential notation.
388	Number.prototype.toFixed()	JavaScript, Method, Number, Prototype, prototype
		The toFixed() method formats a number using fixed-point notation.
389	Number.prototype.toLocaleString()	Internationalization, JavaScript, Method, Number, Prototype, prototype
		The toLocaleString() method returns a string with a language sensitive representation of this number.
390	Number.prototype.toPrecision()	JavaScript, Method, Number, Prototype, prototype
		The toPrecision() method returns a string representing the Number object to the specified precision.
391	Number.prototype.toSource()	JavaScript, Method, Number, Prototype
		The toSource() method returns a string representing the source code of the object.
392	Number.prototype.toString()	JavaScript, Method, Number, Prototype, prototype
		The toString() method returns a string representing the specified Number object.
393	Number.prototype.valueOf()	JavaScript, Method, Number, Prototype, prototype
		The valueOf() method returns the wrapped primitive value of a Number object.
394	Number.toInteger()	JavaScript, Method, Number, Obsolete
		The Number.toInteger() method used to evaluate the passed value and convert it to an integer, but its implementation has been removed.
395	Object	Constructor, JavaScript, Object
		The Object constructor creates an object wrapper.
396	Object.assign()	ECMAScript6, JavaScript, Method, Object, Reference, polyfill
		The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.
397	Object.create()	ECMAScript5, JavaScript, Method, Object, Reference, polyfill
		The Object.create() method creates a new object with the specified prototype object and properties.
398	Object.defineProperties()	ECMAScript5, JavaScript, Method, Object
		The Object.defineProperties() method defines new or modifies existing properties directly on an object, returning the object.
399	Object.defineProperty()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.defineProperty() method defines a new property directly on an object, or modifies an existing property on an object, and returns the object.
400	Additional examples for Object.defineProperty	Examples, JavaScript, Object
		This page provides additional examples for Object.defineProperty().
401	Object.entries()	Experimental, JavaScript, Method, Object
		The Object.entries() method returns an array of a given object's own enumerable property [key, value] pairs, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
402	Object.freeze()	ECMAScript5, JavaScript, Method, Object
		The Object.freeze() method freezes an object: that is, prevents new properties from being added to it; prevents existing properties from being removed; and prevents existing properties, or their enumerability, configurability, or writability, from being changed. In essence the object is made effectively immutable. The method returns the object being frozen.
403	Object.getNotifier()	JavaScript, Method, Object, Obsolete
		The Object.getNotifer() method was used to create an object that allows to synthetically trigger a change, but has been deprecated and removed in browsers.
404	Object.getOwnPropertyDescriptor()	ECMAScript5, JavaScript, Method, Object
		The Object.getOwnPropertyDescriptor() method returns a property descriptor for an own property (that is, one directly present on an object, not present by dint of being along an object's prototype chain) of a given object.
405	Object.getOwnPropertyNames()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object, Reference
		The Object.getOwnPropertyNames() method returns an array of all properties (enumerable or not) found directly upon a given object.
406	Object.getOwnPropertySymbols()	ECMAScript6, JavaScript, Method, Object
		The Object.getOwnPropertySymbols() method returns an array of all symbol properties found directly upon a given object.
407	Object.getPrototypeOf()	ECMAScript5, JavaScript, Method, Object
		The Object.getPrototypeOf() method returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.
408	Object.is()	Comparison, Condition, Conditional, ECMAScript6, Equality, JavaScript, Method, Object
		The Object.is() method determines whether two values are the same value.
409	Object.isExtensible()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.isExtensible() method determines if an object is extensible (whether it can have new properties added to it).
410	Object.isFrozen()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.isFrozen() determines if an object is frozen.
411	Object.isSealed()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.isSealed() method determines if an object is sealed.
412	Object.keys()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.keys() method returns an array of a given object's own enumerable properties, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
413	Object.observe()	JavaScript, Method, Object, Obsolete
		The Object.observe() method was used for asynchronously observing the changes to an object. It provided a stream of changes in the order in which they occur. However, this API has been deprecated and removed from browsers. You can use the more general Proxy object instead.
414	Object.preventExtensions()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.preventExtensions() method prevents new properties from ever being added to an object (i.e. prevents future extensions to the object).
415	Object.prototype	JavaScript, Object, Property
		The Object.prototype property represents the Object prototype object.
416	Object.prototype.__count__	JavaScript, Object, Obsolete, Property, Prototype
		The __count__ property used to store the count of enumerable properties on the object, but it has been removed.
417	Object.prototype.__defineGetter__()	Deprecated, JavaScript, Method, Object, Prototype, prototype
		The __defineGetter__ method binds an object's property to a function to be called when that property is looked up.
418	Object.prototype.__defineSetter__()	Deprecated, JavaScript, Method, Object, Prototype, prototype
		The __defineSetter__ method binds an object's property to a function to be called when an attempt is made to set that property.
419	Object.prototype.__lookupGetter__()	Deprecated, JavaScript, Method, Object, Prototype, prototype
		The __lookupGetter__ method returns the function bound as a getter to the specified property.
420	Object.prototype.__lookupSetter__()	Deprecated, JavaScript, Method, Object, Prototype, prototype
		The __lookupSetter__ method returns the function bound as a setter to the specified property.
421	Object.prototype.__noSuchMethod__	JavaScript, Object, Obsolete, Property, Prototype, prototype
		The __noSuchMethod__ property used to reference a function to be executed when a non-existent method is called on an object, but this function is no longer available.
422	Object.prototype.__parent__	JavaScript, Object, Obsolete, Property, Prototype
		The __parent__ property used to point to an object's context, but it has been removed.
423	Object.prototype.__proto__	Deprecated, JavaScript, Object, Property, Prototype, Reference, prototype
		The __proto__ property of Object.prototype is an accessor property (a getter function and a setter function) that exposes the internal [[Prototype]] (either an object or null) of the object through which it is accessed.
424	Object.prototype.constructor	JavaScript, Object, Property, Prototype, prototype
		Returns a reference to the Object function that created the instance's prototype. Note that the value of this property is a reference to the function itself, not a string containing the function's name. The value is only read-only for primitive values such as 1, true and "test".
425	Object.prototype.eval()	JavaScript, Method, Object, Obsolete
		The Object.eval() method used to evaluate a string of JavaScript code in the context of an object, however, this method has been removed.
426	Object.prototype.hasOwnProperty()	JavaScript, Method, Object, Prototype, prototype
		The hasOwnProperty() method returns a boolean indicating whether the object has the specified property.
427	Object.prototype.isPrototypeOf()	JavaScript, Method, Object, Prototype, prototype
		The isPrototypeOf() method tests for an object in another object's prototype chain.
428	Object.prototype.propertyIsEnumerable()	JavaScript, Method, Object, Prototype, prototype
		The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.
429	Object.prototype.toLocaleString()	JavaScript, Method, Object, Prototype, prototype
		The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.
430	Object.prototype.toSource()	JavaScript, Method, Object, Prototype
		The toSource() method returns a string representing the source code of the object.
431	Object.prototype.toString()	JavaScript, Method, Object, Prototype, prototype
		The toString() method returns a string representing object.
432	Object.prototype.unwatch()	JavaScript, Method, Object, Prototype, Reference
		The unwatch() method removes a watchpoint set with the watch() method.
433	Object.prototype.valueOf()	JavaScript, Method, Object, Prototype, prototype
		Technical review completed.
434	Object.prototype.watch()	JavaScript, Method, Object, Prototype, prototype
		The watch() method watches for a property to be assigned a value and runs a function when that occurs.
435	Object.seal()	ECMAScript5, JavaScript, JavaScript 1.8.5, Method, Object
		The Object.seal() method seals an object, preventing new properties from being added to it and marking all existing properties as non-configurable. Values of present properties can still be changed as long as they are writable.
436	Object.setPrototypeOf()	ECMAScript6, JavaScript, Method, Object
		The Object.setPrototypeOf() method sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or null.
437	Object.unobserve()	JavaScript, Method, Object, Obsolete
		The Object.unobserve() method was used to remove observers set by Object.observe(), but has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
438	Object.values()	Experimental, JavaScript, Method, Object
		The Object.values() method returns an array of a given object's own enumerable property values, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
439	ParallelArray	JavaScript, Obsolete, ParallelArray
		The goal of ParallelArray was to enable data-parallelism in web applications. The higher-order functions available on ParallelArray attempted to execute in parallel, though they may fall back to sequential execution if necessary. To ensure that your code executes in parallel, it is suggested that the functions should be limited to the parallelizable subset of JS that Firefox supports.
440	Promise	ECMAScript6, JavaScript, Promise
		The Promise object is used for deferred and asynchronous computations. A Promise represents an operation that hasn't completed yet, but is expected in the future.
441	Promise.all()	ECMAScript6, JavaScript, Method, Promise
		The Promise.all(iterable) method returns a promise that resolves when all of the promises in the iterable argument have resolved, or rejects with the reason of the first passed promise that rejects.
442	Promise.prototype	JavaScript, Promise, Property
		The Promise.prototype property represents the prototype for the Promise constructor.
443	Promise.prototype.catch()	ECMAScript6, JavaScript, Method, Promise, Prototype, prototype
		The catch() method returns a Promise and deals with rejected cases only. It behaves the same as calling Promise.prototype.then(undefined, onRejected).
444	Promise.prototype.then()	ECMAScript6, JavaScript, Method, Promise, Prototype, prototype
		The then() method returns a Promise. It takes two arguments: callback functions for the success and failure cases of the Promise.
445	Promise.race()	ECMAScript6, JavaScript, Method, Promise
		The Promise.race(iterable) method returns a promise that resolves or rejects as soon as one of the promises in the iterable resolves or rejects, with the value or reason from that promise.
446	Promise.reject()	ECMAScript6, JavaScript, Method, Promise
		The Promise.reject(reason) method returns a Promise object that is rejected with the given reason.
447	Promise.resolve()	ECMAScript6, JavaScript, Method, Promise
		The Promise.resolve(value) method returns a Promise.then object that is resolved with the given value. If the value is a thenable (i.e. has a "then" method), the returned promise will "follow" that thenable, adopting its eventual state; otherwise the returned promise will be fulfilled with the value.
448	Proxy	ECMAScript6, JavaScript, Proxy
		The Proxy object is used to define custom behavior for fundamental operations (e.g. property lookup, assignment, enumeration, function invocation, etc).
449	Proxy handler	ECMAScript6, JavaScript, Proxy
		The proxy's handler object is a placeholder object which contains traps for proxies.
450	handler.apply()	ECMAScript6, JavaScript, Method, Proxy
		The handler.apply() method is a trap for a function call.
451	handler.construct()	ECMAScript6, JavaScript, Method, Proxy
		The handler.construct() method is a trap for the new operator.
452	handler.defineProperty()	ECMAScript6, JavaScript, Method, Proxy
		The handler.defineProperty() method is a trap for Object.defineProperty().
453	handler.deleteProperty()	ECMAScript6, JavaScript, Method, Proxy
		The handler.deleteProperty() method is a trap for the delete operator.
454	handler.enumerate()	ECMAScript6, JavaScript, Method, Obsolete, Proxy
		The handler.enumerate() method used to be a trap for for...in statements, but has been removed from the ECMAScript standard in edition 7 and is deprecated in browsers.
455	handler.get()	ECMAScript6, JavaScript, Method, Proxy
		The handler.get() method is a trap for getting a property value.
456	handler.getOwnPropertyDescriptor()	ECMAScript6, JavaScript, Method, Proxy
		The handler.getOwnPropertyDescriptor() method is a trap for Object.getOwnPropertyDescriptor().
457	handler.getPrototypeOf()	ECMAScript6, JavaScript, Javascript, Method, Proxy, javascript
		The handler.getPrototypeOf() method is a trap for the [[GetPrototypeOf]] internal method.
458	handler.has()	ECMAScript6, JavaScript, Method, Proxy
		The handler.has() method is a trap for the in operator.
459	handler.isExtensible()	ECMAScript6, JavaScript, Method, Proxy
		The handler.isExtensible() method is a trap for Object.isExtensible().
460	handler.ownKeys()	ECMAScript6, JavaScript, Method, Proxy
		The handler.ownKeys() method is a trap for Object.getOwnPropertyNames().
461	handler.preventExtensions()	ECMAScript6, JavaScript, Method, Proxy
		The handler.preventExtensions() method is a trap for Object.preventExtensions().
462	handler.set()	ECMAScript6, JavaScript, Method, Proxy
		The handler.set() method is a trap for setting a property value.
463	handler.setPrototypeOf()	ECMAScript6, JavaScript, Method, Prototype, Proxy, prototype
		The handler.setPrototypeOf() method is a trap for Object.setPrototypeOf().
464	Proxy.revocable()	ECMAScript6, JavaScript, Method, Proxy
		The Proxy.revocable() method is used to create a revocable Proxy object.
465	RangeError	Error, JavaScript, Object, RangeError
		The RangeError object indicates an error when a value is not in the set or range of allowed values.
466	RangeError.prototype	Error, JavaScript, Property, Prototype, RangeError, prototype
		The RangeError.prototype property represents the prototype the RangeError constructor.
467	ReferenceError	Error, JavaScript, Object, Reference, ReferenceError
		The ReferenceError object represents an error when a non-existent variable is referenced.
468	ReferenceError.prototype	Error, JavaScript, Property, Prototype, ReferenceError, prototype
		The ReferenceError.prototype property represents the prototype for the ReferenceError constructor.
469	Reflect	ECMAScript6, JavaScript, Overview, Reflect
		Reflect is a built-in object that provides methods for interceptable JavaScript operations. The methods are the same as those of proxy handlers. Reflect is not a function object, so it's not constructible.
470	Reflect.apply()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.apply() method calls a target function with arguments as specified.
471	Reflect.construct()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.construct() method acts like the new operator as a function. It is equivalent to calling new target(...args).
472	Reflect.defineProperty()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.defineProperty() method is like Object.defineProperty() but returns a Boolean.
473	Reflect.deleteProperty()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.deleteProperty() method allows to delete properties. It is like the delete operator as a function.
474	Reflect.enumerate()	ECMAScript6, JavaScript, Method, Obsolete, Reflect
		The static Reflect.enumerate() method used to return an iterator with the enumerable own and inherited properties of the target object, but has been removed from the ECMAScript standard in edition 7 and is deprecated in browsers.
475	Reflect.get()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.get() method works like getting a property from an object (target[propertyKey]) as a function.
476	Reflect.getOwnPropertyDescriptor()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.getOwnPropertyDescriptor() method is similar to Object.getOwnPropertyDescriptor(). It returns a property descriptor of the given property if it exists on the object, undefined otherwise.
477	Reflect.getPrototypeOf()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.getPrototypeOf() method is the same method as Object.getPrototypeOf(). It returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.
478	Reflect.has()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.has() method works like the in operator as a function.
479	Reflect.isExtensible()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.isExtensible() method determines if an object is extensible (whether it can have new properties added to it). It is similar to Object.isExtensible(), but with some differences.
480	Reflect.ownKeys()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.ownKeys() method returns an array of the target object's own property keys.
481	Reflect.preventExtensions()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.preventExtensions() method prevents new properties from ever being added to an object (i.e. prevents future extensions to the object). It is similar to Object.preventExtensions(), but with some differences.
482	Reflect.set()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.set() method works like setting a property on an object.
483	Reflect.setPrototypeOf()	ECMAScript6, JavaScript, Method, Reflect
		The static Reflect.setPrototypeOf() method is the same method as Object.setPrototypeOf(). It sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or to null.
484	RegExp	Constructor, JavaScript, Reference, RegExp, Regular Expressions
		The RegExp constructor creates a regular expression object for matching text with a pattern.
485	RegExp.$1-$9	JavaScript, Property, Read-only, Reference, RegExp, Regular Expressions
		The non-standard $1, $2, $3, $4, $5, $6, $7, $8, $9 properties are static and read-only properties of regular expressions that contain parenthesized substring matches.
486	RegExp.input ($_)	JavaScript, Property, Reference, RegExp, Regular Expressions
		The non-standard input property is a static property of regular expressions that contains the string against which a regular expression is matched. RegExp.$_ is an alias for this property.
487	RegExp.lastIndex	JavaScript, Property, Reference, RegExp, Regular Expressions
		The lastIndex is a read/write integer property of regular expressions that specifies the index at which to start the next match.
488	RegExp.lastMatch ($&)	JavaScript, Property, Read-only, Reference, RegExp, Regular Expressions
		The non-standard lastMatch property is a static and read-only property of regular expressions that contains the last matched characters. RegExp.$& is an alias for this property.
489	RegExp.lastParen ($+)	JavaScript, Property, Read-only, Reference, RegExp, Regular Expressions
		The non-standard lastParen property is a static and read-only property of regular expressions that contains the last parenthesized substring match, if any. RegExp.$+ is an alias for this property.
490	RegExp.leftContext ($`)	JavaScript, Property, Read-only, Reference, RegExp, Regular Expressions
		The non-standard leftContext property is a static and read-only property of regular expressions that contains the substring preceding the most recent match. RegExp.$` is an alias for this property.
491	RegExp.prototype	JavaScript, Property, Prototype, Reference, RegExp, prototype
		The RegExp.prototype property represents the prototype object for the RegExp constructor.
492	RegExp.prototype.compile()	Deprecated, JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions, prototype
		The deprecated compile() method is used to (re-)compile a regular expression during execution of a script. It is basically the same as the RegExp constructor.
493	RegExp.prototype.exec()	JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions, prototype
		The exec() method executes a search for a match in a specified string. Returns a result array, or null.
494	RegExp.prototype.flags	ECMAScript6, JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The flags property returns a string consisting of the flags of the current regular expression object.
495	RegExp.prototype.global	JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The global property indicates whether or not the "g" flag is used with the regular expression. global is a read-only property of an individual regular expression instance.
496	RegExp.prototype.ignoreCase	JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The ignoreCase property indicates whether or not the "i" flag is used with the regular expression. ignoreCase is a read-only property of an individual regular expression instance.
497	RegExp.prototype.multiline	JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The multiline property indicates whether or not the "m" flag is used with the regular expression. multiline is a read-only property of an individual regular expression instance.
498	RegExp.prototype.source	JavaScript, Javascript, Property, Prototype, Reference, RegExp, Regular Expressions, javascript, prototype
		The source property returns a String containing the source text of the regexp object, and it doesn't contain the two forward slashes on both sides and any flags.
499	RegExp.prototype.sticky	ECMAScript6, JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The sticky property reflects whether or not the search is sticky (searches in strings only from the index indicated by the lastIndex property of this regular expression). sticky is a read-only property of an individual regular expression object.
500	RegExp.prototype.test()	JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions, prototype
		The test() method executes a search for a match between a regular expression and a specified string. Returns true or false.
501	RegExp.prototype.toSource()	JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions
		The toSource() method returns a string representing the source code of the object.
502	RegExp.prototype.toString()	JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions, prototype
		The toString() method returns a string representing the regular expression.
503	RegExp.prototype.unicode	ECMAScript6, JavaScript, Property, Prototype, Reference, RegExp, Regular Expressions, prototype
		The unicode property indicates whether or not the "u" flag is used with a regular expression. unicode is a read-only property of an individual regular expression instance.
504	RegExp.prototype[@@match]()	JavaScript, Javascript, Method, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Prototype, Reference, RegExp, Regular Expressions, javascript, prototype
		The [@@match]() method retrieves the matches when matching a string against a regular expression.
505	RegExp.prototype[@@replace]()	JavaScript, Javascript, Method, Prototype, Reference, RegExp, Regular Expressions, javascript, prototype
		The [@@replace]() method replaces some or all matches of a this pattern in a string by a replacement, and returns the result of the replacement as a new string. The replacement can be a string or a function to be called for each match.
506	RegExp.prototype[@@search]()	JavaScript, Javascript, Method, Prototype, Reference, RegExp, Regular Expressions, javascript, prototype
		The [@@search]() method executes a search for a match between a this regular expression and a string.
507	RegExp.prototype[@@split]()	JavaScript, Method, Prototype, Reference, RegExp, Regular Expressions, prototype
		The [@@split]() method splits a String object into an array of strings by separating the string into substrings.
508	RegExp.rightContext ($')	JavaScript, Property, Read-only, Reference, RegExp, Regular Expressions
		The non-standard rightContext property is a static and read-only property of regular expressions that contains the substring following the most recent match. RegExp.$' is an alias for this property.
509	get RegExp[@@species]	JavaScript, Javascript, Method, Prototype, Reference, RegExp, Regular Expressions, javascript, prototype
		The RegExp[@@species] accessor property returns the RegExp constructor.
510	SIMD	Experimental, JavaScript, SIMD
		SIMD (pronounced "sim-dee") is short for Single Instruction/Multiple Data which is one classification of computer architectures. SIMD operations perform the same computation on multiple data points resulting in data level parallelism and thus performance gains, for example for 3D graphics and video processing, physics simulations or cryptography, and other domains.
511	SIMD.%type%.abs()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.abs() method returns a new SIMD data type with absolute values. This operation exists only on floating point SIMD types.
512	SIMD.%type%.add()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.add() method returns a new instance with the lane values added (a + b).
513	SIMD.%type%.addSaturate()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.addSaturate() method returns a new instance with the lane values added (a + b) and saturating behavior on overflow.
514	SIMD.%type%.allTrue()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%BooleanType%.allTrue() method returns a Boolean indicating whether or not all lanes hold a true value.
515	SIMD.%type%.and()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.and() method returns a new instance with the logical AND of the lane values (a & b). This operation exists only on integer and boolean SIMD types.
516	SIMD.%type%.anyTrue()	Experimental, JavaScript, SIMD
		The static SIMD.%BooleanType%.anyTrue() method returns a Boolean indicating whether or not any of the lanes hold a true value.
517	SIMD.%type%.check()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.check() method returns a SIMD data type if the parameter is a valid SIMD data type and the same as %type%. Otherwise, a TypeError is thrown.
518	SIMD.%type%.div()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.div() method returns a new instance with the lane values divided (a / b). This function is defined only on floating point SIMD types.
519	SIMD.%type%.equal()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.equal() method returns a selection mask with values depending on a strict equality comparison (a === b) in each lane.
520	SIMD.%type%.extractLane()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.extractLane() method returns the value of a given lane.
521	SIMD.%type%.fromFloat32x4()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromFloat32x4() method creates a new SIMD data type with a float conversion from a Float32x4.
522	SIMD.%type%.fromFloat32x4Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromFloat32x4Bits() method creates a new SIMD data type with a bit-wise copy from a Float32x4.
523	SIMD.%type%.fromFloat64x2Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromFloat64x2Bits() method creates a new SIMD data type with a bit-wise copy from a Float64x2.
524	SIMD.%type%.fromInt16x8Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromInt16x8Bits() method creates a new SIMD data type with a bit-wise copy from an int16x8.
525	SIMD.%type%.fromInt32x4()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromInt32x4() method creates a new SIMD data type with a float conversion from an Int32x4.
526	SIMD.%type%.fromInt32x4Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromInt32x4Bits() method creates a new SIMD data type with a bit-wise copy from an Int32x4.
527	SIMD.%type%.fromInt8x16Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromInt8x16Bits() method creates a new SIMD data type with a bit-wise copy from an Int8x16.
528	SIMD.%type%.fromUint16x8Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromUint16x8Bits() method creates a new SIMD data type with a bit-wise copy from a Uint16x8.
529	SIMD.%type%.fromUint32x4()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromUint32x4() method creates a new SIMD data type with a conversion from a Uint32x4.
530	SIMD.%type%.fromUint32x4Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromUint32x4Bits() method creates a new SIMD data type with a bit-wise copy from a Uint32x4.
531	SIMD.%type%.fromUint8x16Bits()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.fromUint8x16Bits() method creates a new SIMD data type with a bit-wise copy from a Uint8x16.
532	SIMD.%type%.greaterThan()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.greaterThan() method returns a selection mask with values depending on a greater-than comparison (a > b) in each lane.
533	SIMD.%type%.greaterThanOrEqual()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.greaterThanOrEqual() method returns a selection mask with values depending on a greater-than-or-equal comparison (a >= b) in each lane.
534	SIMD.%type%.lessThan()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.lessThan() method returns a selection mask with values depending on a less-than comparison (a < b) in each lane.
535	SIMD.%type%.lessThanOrEqual()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.lessThanOrEqual() method returns a selection mask with values depending on a less-than-or-equal comparison (a <= b) in each lane.
536	SIMD.%type%.load()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.load() methods create a new SIMD data type with the lane values loaded from a typed array.
537	SIMD.%type%.max()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.max() method returns a new instance with the maximum lane values of two SIMD types (Math.max(a, b)).
538	SIMD.%type%.maxNum()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.maxNum() method returns a new instance with the maximum lane values of two SIMD types (Math.max(a, b)) preferring numbers over NaN.
539	SIMD.%type%.min()	Experimental, Expérimental, JavaScript, Method, SIMD
		The static SIMD.%type%.min() method returns a new instance with the minimum lane values of two SIMD types (Math.min(a, b)).
540	SIMD.%type%.minNum()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.minNum() method returns a new instance with the minimum lane values of two SIMD types (Math.min(a, b)) preferring numbers over NaN.
541	SIMD.%type%.mul()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.mul() method returns a new instance with the lane values multiplied (a * b).
542	SIMD.%type%.neg()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.mul() method returns a new instance with the lane values negated.
543	SIMD.%type%.not()	Experimental, JavaScript, Method, Reference, SIMD
		The static SIMD.%type%.not() method returns a new instance with the bitwise logical NOT of the lane values (~a). This operation exists only on integer and boolean SIMD types.
544	SIMD.%type%.notEqual()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.notEqual() method returns a selection mask with values depending on an inequality comparison (a != b) in each lane.
545	SIMD.%type%.or()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.or() method returns a new instance with the logical OR of the lane values (a | b). This operation exists only on integer and boolean SIMD types.
546	SIMD.%type%.prototype.toSource()	JavaScript, Method, Non-standard, Prototype, SIMD, prototype
		The non-standard SIMD.%type%.toSource() method returns a string representing the source code of the object.
547	SIMD.%type%.prototype.toString()	Experimental, JavaScript, Method, SIMD
		The SIMD.%type%.toString() method returns a String representing a SIMD object.
548	SIMD.%type%.prototype.valueOf()	Experimental, JavaScript, Method, SIMD
		The SIMD.%type%.valueOf() method performs a type check returns the this value.
549	SIMD.%type%.reciprocalApproximation()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.reciprocalApproximation() method returns a new instance with an approximation of the reciprocal lane values (1 / x).
550	SIMD.%type%.reciprocalSqrtApproximation()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.reciprocalSqrtApproximation() method returns a new instance with an approximation of the reciprocal value (1 / x) of the square root (Math.sqrt()) of the lane values.
551	SIMD.%type%.replaceLane()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.replaceLane() method returns a new SIMD data type with the given lane value replaced.
552	SIMD.%type%.select()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.select() method creates a new integer SIMD data type with the lane values being a selection match from a selector mask.
553	SIMD.%type%.shiftLeftByScalar()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.shiftLeftByScalar() method returns a new instance with the lane values shifted left by a given bit count (a << bits).
554	SIMD.%type%.shiftRightByScalar()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.shiftRightByScalar() method returns a new instance with the lane values shifted right. Depending on the type, these operations are used:
555	SIMD.%type%.shuffle()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.shuffle() method creates a new SIMD data type instance with the lane values shuffled.
556	SIMD.%type%.splat()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.splat() method creates a new SIMD data type with all lanes set to a given value.
557	SIMD.%type%.sqrt()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.sqrt() method returns a new instance with the square root of the lane values (see also Math.sqrt() for the same scalar function).
558	SIMD.%type%.store()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.store() methods store a SIMD data type into a typed array.
559	SIMD.%type%.sub()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.sub() method returns a new instance with the lane values subtracted (a - b).
560	SIMD.%type%.subSaturate()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.subSaturate() method returns a new instance with the lane values subtracted (a - b) and saturating behavior on overflow.
561	SIMD.%type%.swizzle()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.swizzle() method creates a new SIMD data type instance with the lane values swizzled (re-ordered).
562	SIMD.%type%.xor()	Experimental, JavaScript, Method, SIMD
		The static SIMD.%type%.xor() method returns a new instance with the logical XOR of the lane values (a ^ b).
563	SIMD.Bool16x8	Experimental, JavaScript, SIMD
		The SIMD.Bool16x8 data type is a 128-bit vector divided into 8 lanes storing boolean values.
564	SIMD.Bool32x4	Experimental, JavaScript, SIMD
		The SIMD.Bool32x4 data type is a 128-bit vector divided into 4 lanes storing boolean values.
565	SIMD.Bool64x2	Experimental, JavaScript, SIMD
		The SIMD.Bool64x2 data type is a 128-bit vector divided into 2 lanes storing boolean values.
566	SIMD.Bool8x16	Experimental, JavaScript, SIMD
		The SIMD.Bool8x16 data type is a 128-bit vector divided into 16 lanes storing boolean values.
567	SIMD.Float32x4	Experimental, JavaScript, SIMD
		The SIMD.Float32x4 data type is a 128-bit vector divided into 4 lanes storing single precision floating point values.
568	SIMD.Float64x2	Experimental, JavaScript, SIMD
		The SIMD.Float64x2 data type is a 128-bit vector divided into 2 lanes storing double precision floating point values.
569	SIMD.Int16x8	Experimental, JavaScript, SIMD
		The SIMD.Int16x8 data type is a 128-bit vector divided into 8 lanes storing 16-bit signed integer values.
570	SIMD.Int32x4	Experimental, JavaScript, SIMD
		The SIMD.Int32x4 data type is a 128-bit vector divided into 4 lanes storing 32-bit signed integer values.
571	SIMD.Int8x16	Experimental, JavaScript, SIMD
		The SIMD.Int8x16 data type is a 128-bit vector divided into 16 lanes storing 8-bit signed integer values.
572	SIMD.Uint16x8	Experimental, JavaScript, SIMD
		The SIMD.Uint16x8 data type is a 128-bit vector divided into 8 lanes storing 16-bit unsigned integer values.
573	SIMD.Uint32x4	Experimental, JavaScript, SIMD
		The SIMD.Uint32x4 data type is a 128-bit vector divided into 4 lanes storing 32-bit unsigned integer values.
574	SIMD.Uint8x16	Experimental, JavaScript, SIMD
		The SIMD.Uint8x16 data type is a 128-bit vector divided into 16 lanes storing 8-bit unsigned integer values.
575	Set	ECMAScript6, JavaScript, set
		The Set object lets you store unique values of any type, whether primitive values or object references.
576	Set.prototype	ECMAScript6, JavaScript, Property, set
		The Set.prototype property represents the prototype for the Set constructor.
577	Set.prototype.add()	ECMAScript6, JavaScript, Method, Prototype, prototype, set
		The add() method appends a new element with a specified value to the end of a Set object.
578	Set.prototype.clear()	ECMAScript6, JavaScript, Method, Prototype, prototype, set
		The clear() method removes all elements from a Set object.
579	Set.prototype.delete()	ECMAScript6, JavaScript, Method, Prototype, prototype, set
		The delete() method removes the specified element from a Set object.
580	Set.prototype.entries()	ECMAScript6, Iterator, JavaScript, Method, Prototype, prototype, set
		The entries() method returns a new Iterator object that contains an array of [value, value] for each element in the Set object, in insertion order. For Set objects there is no key like in Map objects. However, to keep the API similar to the Map object, each entry has the same value for its key and value here, so that an array [value, value] is returned.
581	Set.prototype.forEach()	ECMAScript6, JavaScript, Method, Prototype, prototype, set
		The forEach() method executes a provided function once per each value in the Set object, in insertion order.
582	Set.prototype.has()	ECMAScript6, JavaScript, Method, Prototype, prototype, set
		The has() method returns a boolean indicating whether an element with the specified value exists in a Set object or not.
583	Set.prototype.size	ECMAScript6, JavaScript, Property, Prototype, prototype, set
		The size accessor property returns the number of elements in a Set object.
584	Set.prototype.values()	ECMAScript6, Iterator, JavaScript, Method, Prototype, prototype, set
		The values() method returns a new Iterator object that contains the values for each element in the Set object in insertion order.
585	Set.prototype[@@iterator]()	ECMAScript6, Iterator, JavaScript, Method, Prototype, Reference, prototype, set
		The initial value of the @@iterator property is the same function object as the initial value of the values property.
586	get Set[@@species]	ECMAScript6, JavaScript, Property, set
		The Set[@@species] accessor property returns the Set constructor.
587	SharedArrayBuffer	Constructor, Experimental, JavaScript, Shared Memory, SharedArrayBuffer, TypedArrays
		The SharedArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer, similar to the ArrayBuffer object, but in a way that they can be used to create views on shared memory. Unlike an ArrayBuffer, a SharedArrayBuffer cannot become detached.
588	SharedArrayBuffer.prototype	Experimental, JavaScript, Property, Shared Memory, SharedArrayBuffer, TypedArrays
		The SharedArrayBuffer.prototype property represents the prototype for the SharedArrayBuffer object.
589	SharedArrayBuffer.prototype.byteLength	Experimental, JavaScript, Property, Shared Memory, SharedArrayBuffer, TypedArrays
		The byteLength accessor property represents the length of an SharedArrayBuffer in bytes.
590	StopIteration	Deprecated, JavaScript, Legacy Iterator, Reference, StopIteration
		The StopIteration object is used to tell the end of the iteration in the legacy iterator protocol.
591	String	ECMAScript6, JavaScript, Reference, String
		The String global object is a constructor for strings, or a sequence of characters.
592	String.fromCharCode()	JavaScript, Method, Reference, String, Unicode
		The static String.fromCharCode() method returns a string created by using the specified sequence of Unicode values.
593	String.fromCodePoint()	ECMAScript6, JavaScript, Method, Reference, String
		The static String.fromCodePoint() method returns a string created by using the specified sequence of code points.
594	String.length	JavaScript, Property, Prototype, Reference, String, prototype
		The length property represents the length of a string.
595	String.prototype	JavaScript, Property, Prototype, Reference, String, prototype
		The String.prototype property represents the String prototype object.
596	String.prototype.anchor()	HTML wrapper methods, JavaScript, Method, Prototype, Reference, String
		The anchor() method creates an <a> HTML anchor element that is used as a hypertext target.
597	String.prototype.big()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The big() method creates a <big> HTML element that causes a string to be displayed in a big font.
598	String.prototype.blink()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The blink() method creates a <blink> HTML element that causes a string to blink.
599	String.prototype.bold()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The bold() method creates a <b> HTML element that causes a string to be displayed as bold.
600	String.prototype.charAt()	JavaScript, Method, Prototype, Reference, String, prototype
		Technical review completed.
601	String.prototype.charCodeAt()	JavaScript, Method, Reference, String, Unicode
		The charCodeAt() method returns an integer between 0 and 65535 representing the UTF-16 code unit at the given index (the UTF-16 code unit matches the Unicode code point for code points representable in a single UTF-16 code unit, but might also be the first code unit of a surrogate pair for code points not representable in a single UTF-16 code unit, e.g. Unicode code points > 0x10000). If you want the entire code point value, use codePointAt().
602	String.prototype.codePointAt()	ECMAScript6, JavaScript, Method, Prototype, Reference, String, prototype
		The codePointAt() method returns a non-negative integer that is the Unicode code point value.
603	String.prototype.concat()	JavaScript, Method, Prototype, Reference, String, prototype
		The concat() method combines the text of two or more strings and returns a new string.
604	String.prototype.endsWith()	JavaScript, Method, Prototype, Reference, String, prototype
		The endsWith() method determines whether a string ends with the characters of another string, returning true or false as appropriate.
605	String.prototype.fixed()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The fixed() method creates a <tt> HTML element that causes a string to be displayed in fixed-pitch font.
606	String.prototype.fontcolor()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The fontcolor() method creates a <font> HTML element that causes a string to be displayed in the specified font color.
607	String.prototype.fontsize()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The fontsize() method creates a <font> HTML element that causes a string to be displayed in the specified font size.
608	String.prototype.includes()	JavaScript, Method, Prototype, Reference, String, prototype
		The includes() method determines whether one string may be found within another string, returning true or false as appropriate.
609	String.prototype.indexOf()	JavaScript, Method, Prototype, Reference, String, prototype
		The indexOf() method returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex. Returns -1 if the value is not found.
610	String.prototype.italics()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, String, prototype
		The italics() method creates an <i> HTML element that causes a string to be italic.
611	String.prototype.lastIndexOf()	JavaScript, Method, Prototype, Reference, String, prototype
		The lastIndexOf() method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from fromIndex. Returns -1 if the value is not found.
612	String.prototype.link()	HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The link() method creates a string representing the code for an <a> HTML element to be used as a hypertext link to another URL.
613	String.prototype.localeCompare()	Internationalization, JavaScript, Method, Prototype, Reference, String, prototype
		The localeCompare() method returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order.
614	String.prototype.match()	JavaScript, Javascript, Method, Prototype, Reference, Regular Expressions, String, javascript, prototype
		The match() method retrieves the matches when matching a string against a regular expression.
615	String.prototype.normalize()	ECMAScript6, JavaScript, Method, Prototype, Reference, String, Unicode, prototype
		The normalize() method returns the Unicode Normalization Form of a given string (if the value isn't a string, it will be converted to one first).
616	String.prototype.padEnd()	Experimental, JavaScript, Method, Reference, String
		The padEnd() method pads the current string with a given string (eventually repeated) so that the resulting string reaches a given length. The pad is applied from the end (right) of the current string.
617	String.prototype.padStart()	Experimental, JavaScript, Method, Reference, String
		The padStart() method pads the current string with a given string (eventually repeated) so that the resulting string reaches a given length. The pad is applied from the start (left) of the current string.
618	String.prototype.quote()	JavaScript, Method, Obsolete, Prototype, Reference, String
		The non-standard quote() method returns a copy of the string, replacing various special characters in the string with their escape sequences and wrapping the result in double-quotes (").
619	String.prototype.repeat()	ECMAScript6, JavaScript, Method, Prototype, Reference, String, prototype
		The repeat() method constructs and returns a new string which contains the specified number of copies of the string on which it was called, concatenated together.
620	String.prototype.replace()	Expressions, JavaScript, Method, Prototype, Reference, Regular, String, prototype
		The replace() method returns a new string with some or all matches of a pattern replaced by a replacement. The pattern can be a string or a RegExp, and the replacement can be a string or a function to be called for each match.
621	String.prototype.search()	JavaScript, Javascript, Method, Prototype, Reference, Regular Expressions, String, javascript, prototype
		The search() method executes a search for a match between a regular expression and this String object.
622	String.prototype.slice()	JavaScript, Method, Prototype, Reference, String, prototype
		The slice() method extracts a section of a string and returns a new string.
623	String.prototype.small()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The small() method creates a <small> HTML element that causes a string to be displayed in a small font.
624	String.prototype.split()	JavaScript, Method, Prototype, Reference, Regular Expressions, String, prototype
		Technical review completed.
625	String.prototype.startsWith()	ECMAScript6, JavaScript, Method, Prototype, Reference, String, prototype
		The startsWith() method determines whether a string begins with the characters of another string, returning true or false as appropriate.
626	String.prototype.strike()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, String, prototype
		The strike() method creates a <strike> HTML element that causes a string to be displayed as struck-out text.
627	String.prototype.sub()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, String, prototype
		The sub() method creates a <sub> HTML element that causes a string to be displayed as subscript.
628	String.prototype.substr()	JavaScript, Method, Prototype, Reference, String, prototype
		The substr() method returns the characters in a string beginning at the specified location through the specified number of characters.
629	String.prototype.substring()	JavaScript, Method, Prototype, Reference, String, prototype
		The substring() method returns a subset of a string between one index and another, or through the end of the string.
630	String.prototype.sup()	Deprecated, HTML wrapper methods, JavaScript, Method, Prototype, Reference, String, prototype
		The sup() method creates a <sup> HTML element that causes a string to be displayed as superscript.
631	String.prototype.toLocaleLowerCase()	Internationalization, JavaScript, Method, Prototype, Reference, String, prototype
		The toLocaleLowerCase() method returns the calling string value converted to lower case, according to any locale-specific case mappings.
632	String.prototype.toLocaleUpperCase()	Internationalization, JavaScript, Method, Prototype, Reference, String, prototype
		The toLocaleUpperCase() method returns the calling string value converted to upper case, according to any locale-specific case mappings.
633	String.prototype.toLowerCase()	JavaScript, Method, Prototype, Reference, String, prototype
		The toLowerCase() method returns the calling string value converted to lowercase.
634	String.prototype.toSource()	JavaScript, Method, Non-standard, Prototype, Reference, String, prototype
		The toSource() method returns a string representing the source code of the object.
635	String.prototype.toString()	JavaScript, Method, Prototype, Reference, String, prototype
		The toString() method returns a string representing the specified object.
636	String.prototype.toUpperCase()	JavaScript, Method, Prototype, Reference, String, prototype
		The toUpperCase() method returns the calling string value converted to uppercase.
637	String.prototype.trim()	ECMAScript5, JavaScript, Method, Prototype, Reference, String, prototype
		The trim() method removes whitespace from both ends of a string. Whitespace in this context is all the whitespace characters (space, tab, no-break space, etc.) and all the line terminator characters (LF, CR, etc.).
638	String.prototype.trimLeft()	JavaScript, Method, Prototype, Reference, String
		The trimLeft() method removes whitespace from the left end of a string.
639	String.prototype.trimRight()	JavaScript, Method, Prototype, Reference, String
		The trimRight() method removes whitespace from the right end of a string.
640	String.prototype.valueOf()	JavaScript, Method, Prototype, Reference, String, prototype
		The valueOf() method returns the primitive value of a String object.
641	String.prototype[@@iterator]()	ECMAScript6, Iterator, JavaScript, Method, Prototype, Reference, String, prototype
		The [@@iterator]() method returns a new Iterator object that iterates over the code points of a String value, returning each code point as a String value.
642	String.raw()	ECMAScript6, JavaScript, Method, Reference, String
		The static String.raw() method is a tag function of template literals, similar to the r prefix in Python or the @ prefix in C# for string literals (yet there is a difference: see explanations in this issue). It's used to get the raw string form of template strings (that is, the original, uninterpreted text).
643	Symbol	ECMAScript6, JavaScript, Javascript, Symbol, javascript
		A symbol is a unique and immutable data type and may be used as an identifier for object properties. The symbol object is an implicit object wrapper for the symbol primitive data type.
644	Symbol.for()	ECMAScript6, JavaScript, Method, Symbol
		The Symbol.for(key) method searches for existing symbols in a runtime-wide symbol registry with the given key and returns it if found. Otherwise a new symbol gets created in the global symbol registry with this key.
645	Symbol.isConcatSpreadable	ECMAScript6, JavaScript, Javascript, Property, Symbol, javascript
		The Symbol.isConcatSpreadable well-known symbol is used to configure if an object should be flattened to its array elements when using the Array.prototype.concat() method.
646	Symbol.iterator	ECMAScript6, JavaScript, Property, Symbol
		The Symbol.iterator well-known symbol specifies the default iterator for an object. Used by for...of.
647	Symbol.keyFor()	ECMAScript6, JavaScript, Method, Symbol
		The Symbol.keyFor(sym) method retrieves a shared symbol key from the global symbol registry for the given symbol.
648	Symbol.match	ECMAScript6, JavaScript, Property, Symbol
		The Symbol.match well-known symbol specifies the matching of a regular expression against a string. This function is called by the String.prototype.match() method.
649	Symbol.prototype	JavaScript, Property, Symbol
		The Symbol.prototype property represents the prototype for the Symbol constructor.
650	Symbol.prototype.toSource()	JavaScript, Method, Prototype, Symbol
		The toSource() method returns a string representing the source code of the object.
651	Symbol.prototype.toString()	ECMAScript6, JavaScript, Method, Prototype, Symbol, prototype
		The toString() method returns a string representing the specified Symbol object.
652	Symbol.prototype.valueOf()	ECMAScript6, JavaScript, Method, Prototype, Symbol, prototype
		The valueOf() method returns the primitive value of a Symbol object.
653	Symbol.prototype[@@toPrimitive]	ECMAScript6, JavaScript, Method, Prototype, Symbol, prototype
		The [@@toPrimitive]() method converts a Symbol object to a primitive value.
654	Symbol.replace	ECMAScript6, JavaScript, Javascript, Property, Symbol, javascript
		The Symbol.replace well-known symbol specifies the method that replaces matched substrings of a string. This function is called by the String.prototype.replace() method.
655	Symbol.search	ECMAScript6, JavaScript, Javascript, Property, Symbol, javascript
		The Symbol.search well-known symbol specifies the method that returns the index within a string that matches the regular expression. This function is called by the String.prototype.search() method.
656	Symbol.species	ECMAScript6, JavaScript, Property, Symbol
		The Symbol.species well-known symbol specifies a function valued property that is the constructor function that is used to create derived objects.
657	Symbol.split	ECMAScript6, JavaScript, Javascript, Property, Symbol, javascript
		The Symbol.split well-known symbol specifies the method that splits a string at the indices that match a regular expression. This function is called by the String.prototype.split() method.
658	Symbol.toPrimitive	ECMAScript6, JavaScript, Property, Symbol
		The Symbol.toPrimitive is a symbol that specifies a function valued property that is called to convert an object to a corresponding primitive value.
659	Symbol.unscopables	ECMAScript6, JavaScript, Property, Symbol
		The Symbol.unscopables well-known symbol is used to specify an object value of whose own and inherited property names are excluded from the with environment bindings of the associated object.
660	SyntaxError	Error, JavaScript, Object, Reference, SyntaxError
		The SyntaxError object represents an error when trying to interpret syntactically invalid code.
661	SyntaxError.prototype	Error, JavaScript, Property, Prototype, SyntaxError, prototype
		The SyntaxError.prototype property represents the prototype for the SyntaxError constructor.
662	TypeError	Error, JavaScript, Object, Reference, TypeError
		The TypeError object represents an error when a value is not of the expected type.
663	TypeError.prototype	Error, JavaScript, Property, Prototype, TypeError, prototype
		The TypeError.prototype property represents the prototype for the TypeError constructor.
664	TypedArray	JavaScript, TypedArray, TypedArrays
		A TypedArray object describes an array-like view of an underlying binary data buffer. There is no global property named TypedArray, nor is there a directly visible TypedArray constructor.  Instead, there are a number of different global properties, whose values are typed array constructors for specific element types, listed below. On the following pages you will find common properties and methods that can be used with any typed array containing elements of any type.
665	TypedArray.BYTES_PER_ELEMENT	JavaScript, Property, TypedArray, TypedArrays
		The TypedArray.BYTES_PER_ELEMENT property represents the size in bytes of each element in an typed array.
666	TypedArray.from()	ECMAScript6, JavaScript, Method, TypedArray, TypedArrays
		The TypedArray.from() method creates a new typed array from an array-like or iterable object. This method is nearly the same as Array.from().
667	TypedArray.name	JavaScript, Property, TypedArray, TypedArrays
		The TypedArray.name property represents a string value of the typed array constructor name.
668	TypedArray.of()	ECMAScript6, JavaScript, Method, TypedArray, TypedArrays
		The TypedArray.of() method creates a new typed array with a variable number of arguments. This method is nearly the same as Array.of().
669	TypedArray.prototype	JavaScript, Property, TypedArray, TypedArrays
		The TypedArray.prototype property represents the prototype for TypedArray constructors.
670	TypedArray.prototype.buffer	JavaScript, Property, Prototype, TypedArray, TypedArrays, prototype
		The buffer accessor property represents the ArrayBuffer referenced by a TypedArray at construction time.
671	TypedArray.prototype.byteLength	JavaScript, Property, Prototype, TypedArray, TypedArrays, prototype
		The byteLength accessor property represents the length (in bytes) of a typed array.
672	TypedArray.prototype.byteOffset	JavaScript, Property, Prototype, TypedArray, TypedArrays, prototype
		The byteOffset accessor property represents the offset (in bytes) of a typed array from the start of its ArrayBuffer.
673	TypedArray.prototype.copyWithin()	JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The copyWithin() method copies the sequence of array elements within the array to the position starting at target. The copy is taken from the index positions of the second and third arguments start and end. The end argument is optional and defaults to the length of the array. This method has the same algorithm as Array.prototype.copyWithin. TypedArray is one of the typed array types here.
674	TypedArray.prototype.entries()	ECMAScript6, Iterator, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The entries() method returns a new Array Iterator object that contains the key/value pairs for each index in the array.
675	TypedArray.prototype.every()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The every() method tests whether all elements in the typed array pass the test implemented by the provided function. This method has the same algorithm as Array.prototype.every(). TypedArray is one of the typed array types here.
676	TypedArray.prototype.fill()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The fill() method fills all the elements of a typed array from a start index to an end index with a static value. This method has the same algorithm as Array.prototype.fill(). TypedArray is one of the typed array types here.
677	TypedArray.prototype.filter()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The filter() method creates a new typed array with all elements that pass the test implemented by the provided function. This method has the same algorithm as Array.prototype.filter(). TypedArray is one of the typed array types here.
678	TypedArray.prototype.find()	ECMAScript6, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The find() method returns a value in the typed array, if an element satisfies the provided testing function. Otherwise undefined is returned. TypedArray is one of the typed array types here.
679	TypedArray.prototype.findIndex()	ECMAScript6, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The findIndex() method returns an index in the typed array, if an element in the typed array satisfies the provided testing function. Otherwise -1 is returned.
680	TypedArray.prototype.forEach()	ECMAScript6, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The forEach() method executes a provided function once per array element. This method has the same algorithm as Array.prototype.forEach(). TypedArray is one of the typed array types here.
681	TypedArray.prototype.includes()	ECMAScript7, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The includes() method determines whether a typed array includes a certain element, returning true or false as appropriate. This method has the same algorithm as Array.prototype.includes(). TypedArray is one of the typed array types here.
682	TypedArray.prototype.indexOf()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The indexOf() method returns the first index at which a given element can be found in the typed array, or -1 if it is not present. This method has the same algorithm as Array.prototype.indexOf(). TypedArray is one of the typed array types here.
683	TypedArray.prototype.join()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The join() method joins all elements of an array into a string. This method has the same algorithm as Array.prototype.join(). TypedArray is one of the typed array types here.
684	TypedArray.prototype.keys()	ECMAScript6, Iterator, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The keys() method returns a new Array Iterator object that contains the keys for each index in the array.
685	TypedArray.prototype.lastIndexOf()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The lastIndexOf() method returns the last index at which a given element can be found in the typed array, or -1 if it is not present. The typed array is searched backwards, starting at fromIndex. This method has the same algorithm as Array.prototype.lastIndexOf(). TypedArray is one of the typed array types here.
686	TypedArray.prototype.length	JavaScript, Property, Prototype, TypedArray, TypedArrays, prototype
		The length accessor property represents the length (in elements) of a typed array.
687	TypedArray.prototype.map()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The map() method creates a new typed array with the results of calling a provided function on every element in this typed array. This method has the same algorithm as Array.prototype.map(). TypedArray is one of the typed array types here.
688	TypedArray.prototype.move()	JavaScript, Method, Obsolete, Prototype, TypedArray
		The move() method used to copy the sequence of array elements within the array to the position starting at target. However, this non-standard method has been replaced with the standard TypedArray.prototype.copyWithin() method. TypedArray is one of the typed array types here.
689	TypedArray.prototype.reduce()	JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The reduce() method applies a function against an accumulator and each value of the typed array (from left-to-right) has to reduce it to a single value. This method has the same algorithm as Array.prototype.reduce(). TypedArray is one of the typed array types here.
690	TypedArray.prototype.reduceRight()	JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The reduceRight() method applies a function against an accumulator and each value of the typed array (from right-to-left) has to reduce it to a single value. This method has the same algorithm as Array.prototype.reduceRight(). TypedArray is one of the typed array types here.
691	TypedArray.prototype.reverse()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The reverse() method reverses a typed array in place. The first typed array element becomes the last and the last becomes the first. This method has the same algorithm as Array.prototype.reverse(). TypedArray is one of the typed array types here.
692	TypedArray.prototype.set()	JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The set() method stores multiple values in the typed array, reading input values from a specified array.
693	TypedArray.prototype.slice()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The slice() method returns a shallow copy of a portion of a typed array into a new typed array object. This method has the same algorithm as Array.prototype.slice(). TypedArray is one of the typed array types here.
694	TypedArray.prototype.some()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The some() method tests whether some element in the typed array passes the test implemented by the provided function. This method has the same algorithm as Array.prototype.some(). TypedArray is one of the typed array types here.
695	TypedArray.prototype.sort()	ECMAScript6, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The sort() method sorts the elements of a typed array in place and returns the typed array. This method has the same algorithm as Array.prototype.sort(). TypedArray is one of the typed array types here.
696	TypedArray.prototype.subarray()	JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The subarray() method returns a new TypedArray on the same ArrayBuffer store and with the same element types as for this TypedArray object. The begin offset is inclusive and the end offset is exclusive. TypedArray is one of the typed array types.
697	TypedArray.prototype.values()	ECMAScript6, Iterator, JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		The values() method returns a new Array Iterator object that contains the values for each index in the array.
698	TypedArray.prototype[@@iterator]()	Iterator, JavaScript, Method, Prototype, Reference, TypedArray, TypedArrays, prototype
		The initial value of the @@iterator property is the same function object as the initial value of the values property.
699	get TypedArray[@@species]	JavaScript, Method, Prototype, TypedArray, TypedArrays, prototype
		Technical review completed.
700	URIError	Error, JavaScript, Object, Reference, URIError
		The URIError object represents an error when a global URI handling function was used in a wrong way.
701	URIError.prototype	Error, JavaScript, Property, Prototype, URIError, prototype
		The URIError.prototype property represents the prototype for the URIError constructor.
702	Uint16Array	Constructor, JavaScript, TypedArray, TypedArrays, Uint16Array
		The Uint16Array typed array represents an array of 16-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
703	Uint32Array	Constructor, JavaScript, TypedArray, TypedArrays
		The Uint32Array typed array represents an array of 32-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
704	Uint8Array	Constructor, JavaScript, TypedArray, TypedArrays, Uint8Array
		The Uint8Array typed array represents an array of 8-bit unsigned integers. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
705	Uint8ClampedArray	Constructor, JavaScript, TypedArray, TypedArrays, Uint8ClampedArray
		The Uint8ClampedArray typed array represents an array of 8-bit unsigned integers clamped to 0-255; if you specified a value that is out of the range of [0,255], 0 or 255 will be set instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
706	WeakMap	ECMAScript6, JavaScript, WeakMap
		The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced.  The keys must be objects and the values can be arbitrary values.
707	WeakMap.prototype	ECMAScript6, JavaScript, Property, WeakMap
		The WeakMap.prototype property represents the prototype for the WeakMap constructor.
708	WeakMap.prototype.clear()	JavaScript, Method, Obsolete, Prototype, WeakMap, prototype
		The clear() method used to remove all elements from a WeakMap object, but is no longer part of ECMAScript and its implementations.
709	WeakMap.prototype.delete()	ECMAScript6, JavaScript, Method, Prototype, WeakMap, prototype
		The delete() method removes the specified element from a WeakMap object.
710	WeakMap.prototype.get()	ECMAScript6, JavaScript, Method, Prototype, WeakMap, prototype
		The get() method returns a specified element from a WeakMap object.
711	WeakMap.prototype.has()	ECMAScript6, JavaScript, Method, Prototype, WeakMap, prototype
		The has() method returns a boolean indicating whether an element with the specified key exists in the WeakMap object or not.
712	WeakMap.prototype.set()	ECMAScript6, JavaScript, Method, Prototype, WeakMap, prototype
		The set() method adds a new element with a specified key and value to a WeakMap object.
713	WeakSet	ECMAScript6, JavaScript, WeakSet
		The WeakSet object lets you store weakly held objects in a collection.
714	WeakSet.prototype	ECMAScript6, JavaScript, Property, WeakSet
		The WeakSet.prototype property represents the prototype for the WeakSet constructor.
715	WeakSet.prototype.add()	ECMAScript6, JavaScript, Method, Prototype, WeakSet, prototype
		The add() method appends a new object to the end of a WeakSet object.
716	WeakSet.prototype.clear()	JavaScript, Method, Obsolete, Prototype, WeakSet, prototype
		The clear() method used to remove all elements from a WeakSet object, but is no longer part of ECMAScript and its implementations.
717	WeakSet.prototype.delete()	ECMAScript6, JavaScript, Method, Prototype, WeakSet, prototype
		The delete() method removes the specified element from a WeakSet object.
718	WeakSet.prototype.has()	ECMAScript6, JavaScript, Method, Prototype, WeakSet, prototype
		The has() method returns a boolean indicating whether an object exists in a WeakSet or not.
719	decodeURI()	JavaScript
		The decodeURI() function decodes a Uniform Resource Identifier (URI) previously created by encodeURI or by a similar routine.
720	decodeURIComponent()	JavaScript
		The decodeURIComponent() function decodes a Uniform Resource Identifier (URI) component previously created by encodeURIComponent or by a similar routine.
721	encodeURI()	JavaScript, URI
		The encodeURI() function encodes a Uniform Resource Identifier (URI) by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two "surrogate" characters).
722	encodeURIComponent()	JavaScript, URI
		The encodeURIComponent() function encodes a Uniform Resource Identifier (URI) component by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two "surrogate" characters).
723	escape()	Deprecated, JavaScript
		The deprecated escape() function computes a new string in which certain characters have been replaced by a hexadecimal escape sequence. Use encodeURI or encodeURIComponent instead.
724	eval()	JavaScript
		The eval() function evaluates JavaScript code represented as a string.
725	isFinite()	JavaScript
		The global isFinite() function determines whether the passed value is a finite number. If needed, the parameter is first converted to a number.
726	isNaN()	JavaScript
		The isNaN() function determines whether a value is NaN or not. Note: coercion inside the isNaN function has interesting rules; you may alternatively want to use Number.isNaN(), as defined in ECMAScript 6, or you can use typeof to determine if the value is Not-A-Number.
727	null	JavaScript, Literal, Primitive
		The value null represents the intentional absence of any object value. It is one of JavaScript's primitive values.
728	parseFloat()	JavaScript
		The parseFloat() function parses a string argument and returns a floating point number.
729	parseInt()	JavaScript
		The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).
730	undefined	JavaScript
		The global undefined property represents the primitive value undefined. It is one of JavaScript's primitive types.
731	unescape()	Deprecated, JavaScript
		The deprecated unescape() function computes a new string in which hexadecimal escape sequences are replaced with the character that it represents. The escape sequences might be introduced by a function like escape. Because unescape is deprecated, use decodeURI or decodeURIComponent instead.
732	uneval()	JavaScript
		The uneval() function creates a string representation of the source code of an Object.
733	Statements and declarations	JavaScript, Reference, statements
		JavaScript applications consist of statements with an appropriate syntax. A single statement may span multiple lines. Multiple statements may occur on a single line if each statement is separated by a semicolon. This isn't a keyword, but a group of keywords.
734	Legacy generator function	JavaScript, Legacy Iterator, Reference
		The legacy generator function statement declares legacy generator functions with the specified parameters.
735	block	JavaScript, Reference, Statement
		A block statement (or compound statement in other languages) is used to group zero or more statements. The block is delimited by a pair of curly brackets.
736	break	JavaScript, Statement
		The break statement terminates the current loop, switch, or label statement and transfers program control to the statement following the terminated statement.
737	class	Classes, Declaration, ECMAScript6, JavaScript, Ref, Statement
		The class declaration creates a new class with a given name using prototype-based inheritance.
738	const	ECMAScript6, JavaScript, Reference, Statement, constants
		The const declaration creates a read-only reference to a value. It does not mean the value it holds is immutable, just that the variable identifier cannot be reassigned.
739	continue	JavaScript, Statement
		The continue statement terminates execution of the statements in the current iteration of the current or labeled loop, and continues execution of the loop with the next iteration.
740	debugger	JavaScript, Statement
		The debugger statement invokes any available debugging functionality, such as setting a breakpoint. If no debugging functionality is available, this statement has no effect.
741	default	JavaScript, Keyword
		Technical review completed.
742	do...while	JavaScript, Statement
		The do...while statement creates a loop that executes a specified statement until the test condition evaluates to false. The condition is evaluated after executing the statement, resulting in the specified statement executing at least once.
743	empty	JavaScript, Statement
		An empty statement is used to provide no statement, although the JavaScript syntax would expect one.
744	export	ECMAScript6, JavaScript, Statement
		The export statement is used to export functions, objects or primitives from a given file (or module).
745	for	JavaScript, Loop, Statement, for
		The for statement creates a loop that consists of three optional expressions, enclosed in parentheses and separated by semicolons, followed by a statement or a set of statements executed in the loop.
746	for each...in	Deprecated, E4X, JavaScript, Statement
		The for each...in statement iterates a specified variable over all values of object's properties. For each distinct property, a specified statement is executed.
747	for...in	JavaScript, Statement
		The for...in statement iterates over the enumerable properties of an object, in arbitrary order. For each distinct property, statements can be executed.
748	for...of	ECMAScript6, JavaScript, Statement
		The for...of statement creates a loop iterating over iterable objects (including Array, Map, Set, String, TypedArray, arguments object and so on), invoking a custom iteration hook with statements to be executed for the value of each distinct property.
749	function	JavaScript, Statement
		The function declaration defines a function with the specified parameters.
750	function*	ECMAScript6, Function, Iterator, JavaScript, Statement
		The function* declaration (function keyword followed by an asterisk) defines a generator function, which returns a Generator object.
751	if...else	JavaScript, Statement
		The if statement executes a statement if a specified condition is true. If the condition is false, another statement can be executed.
752	import	ECMAScript6, JavaScript, Modules, Statement
		The import statement is used to import functions, objects or primitives that have been exported from an external module, another script, etc.
753	label	JavaScript, Statement
		The labeled statement can be used with break or continue statements. It is prefixing a statement with an identifier which you can refer to.
754	let	ECMAScript 2015, ECMAScript6, JavaScript, Statement, Variable declaration, Variables, let
		The let statement declares a block scope local variable, optionally initializing it to a value.
755	return	JavaScript, Statement
		The return statement ends function execution and specifies a value to be returned to the function caller.
756	switch	JavaScript, Reference, Statement, Web
		The switch statement evaluates an expression, matching the expression's value to a case clause, and executes statements associated with that case.
757	throw	JavaScript, Statement
		The throw statement throws a user-defined exception. Execution of the current function will stop (the statements after throw won't be executed), and control will be passed to the first catch block in the call stack. If no catch block exists among caller functions, the program will terminate.
758	try...catch	JavaScript, Statement
		The try...catch statement marks a block of statements to try, and specifies a response, should an exception be thrown.
759	var	JavaScript, Statement
		The variable statement declares a variable, optionally initializing it to a value.
760	while	JavaScript, Statement
		The while statement creates a loop that executes a specified statement as long as the test condition evaluates to true. The condition is evaluated before executing the statement.
761	with	Deprecated, JavaScript, Statement
		The with statement extends the scope chain for a statement.
762	Strict mode	ECMAScript5, JavaScript, Strict Mode
		ECMAScript 5's strict mode is a way to opt in to a restricted variant of JavaScript. Strict mode isn't just a subset: it intentionally has different semantics from normal code. Browsers not supporting strict mode will run strict mode code with different behavior from browsers that do, so don't rely on strict mode without feature-testing for support for the relevant aspects of strict mode. Strict mode code and non-strict mode code can coexist, so scripts can opt into strict mode incrementally.
763	Transitioning to strict mode	Advanced, JavaScript
		ECMAScript 5 introduced strict mode which is now implemented in all major browsers (including IE10). While making web browsers interpret code as strict is easy (just add "use strict"; at the top of your source code), transitioning an existing code base to strict mode requires a bit more work.
764	Template literals	ECMAScript6, JavaScript, Template Strings, Template literals
		Template literals are string literals allowing embedded expressions. You can use multi-line strings and string interpolation features with them. They were called "template strings" in prior editions of the ES2015 / ES6 specification.
765	JavaScript shells	Extensions, JavaScript, Tools
		A JavaScript shell allows you to quickly test snippets of JavaScript code without having to reload a web page. They are extremely useful for developing and debugging code.
766	JavaScript technologies overview	Beginner, DOM, JavaScript
		Whereas HTML defines a webpage's structure and content and CSS sets the formatting and appearance, JavaScript adds interactivity to a webpage and creates rich web applications.
767	JavaScript typed arrays	Guide, JavaScript
		JavaScript typed arrays are array-like objects and provide a mechanism for accessing raw binary data. As you may already know, Array objects grow and shrink dynamically and can have any JavaScript value. JavaScript engines perform optimizations so that these arrays are fast. However, as web applications become more and more powerful, adding features such as audio and video manipulation, access to raw data using WebSockets, and so forth, it has become clear that there are times when it would be helpful for JavaScript code to be able to quickly and easily manipulate raw binary data in typed arrays.
768	Memory Management	JavaScript, Performance, memory, performance
		Low-level languages, like C, have low-level memory management primitives like malloc() and free(). On the other hand, JavaScript values are allocated when things (objects, strings, etc.) are created and "automatically" freed when they are not used anymore. The latter process is called garbage collection. This "automatically" is a source of confusion and gives JavaScript (and high-level languages) developers the impression they can decide not to care about memory management. This is a mistake.
769	New in JavaScript	JavaScript, Versions
		This chapter contains information about JavaScript's version history and implementation status for Mozilla/SpiderMonkey-based JavaScript applications, such as Firefox.
770	ECMAScript 5 support in Mozilla	ECMAScript5, JavaScript, Versions
		ECMAScript 5.1, an older version of the standard upon which JavaScript is based, was approved in June 2011.
771	ECMAScript 6 support in Mozilla	ECMAScript2015, ECMAScript6, Firefox, JavaScript
		ECMAScript 2015 (6th Edition) is the current version of the ECMAScript Language Specification standard. Commonly referred to as "ES6", it defines the standard for the JavaScript implementation in SpiderMonkey, the engine used in Firefox and other Mozilla applications.
772	ECMAScript Next support in Mozilla	Firefox, JavaScript
		ECMAScript Next refers to new features of the ECMA-262 standard (commonly referred to as JavaScript) introduced after ECMAScript 6 (ES2015). New versions of ECMAScript specifications are released yearly. This year, the ES2016 specification will be released and the ES2017 is the current ECMAScript draft specification.
773	Firefox JavaScript changelog	JavaScript, Versions
		The following is a changelog for JavaScript features in Firefox releases.
774	New in JavaScript 1.1	JavaScript, Versions
		The following is a changelog for JavaScript from Netscape Navigator 2.0 to 3.0. The old Netscape documentation references this as "Features added after version 1". Netscape Navigator 3.0 was released on August 19, 1996. Netscape Navigator 3.0 was the second major version of the browser with JavaScript support.
775	New in JavaScript 1.2	JavaScript, Versions
		The following is a changelog for JavaScript from Netscape Navigator 3.0 to 4.0. The old Netscape documentation can be found on archive.org. Netscape Navigator 4.0 was released on June 11, 1997. Netscape Navigator 4.0 was the third major version of the browser with JavaScript support.
776	New in JavaScript 1.3	JavaScript, Versions
		The following is a changelog for JavaScript from Netscape Navigator 4.0 to 4.5. The old Netscape documentation can be found on archive.org. Netscape Navigator 4.5 was released on October 19, 1998.
777	New in JavaScript 1.4	JavaScript, Versions
		The following is a changelog for JavaScript 1.4, which was only used for Netscape's server side JavaScript released in 1999. The old Netscape documentation can be found on archive.org.
778	New in JavaScript 1.5	JavaScript, Versions
		The following is a changelog for JavaScript 1.5. This version was included in Netscape Navigator 6.0 was released on November 14, 2000 and was also used in later versions of Netscape Navigator and Firefox 1.0. You can compare JavaScript 1.5 to JScript version 5.5 and Internet Explorer 5.5, which was released in July 2000. The corresponding ECMA standard is ECMA-262 Edition 3 (from December 1999).
779	New in JavaScript 1.6	JavaScript, Versions
		The following is a changelog for JavaScript 1.6. This version was included in Firefox 1.5 (Gecko 1.8), which was released in November 2005. The corresponding ECMA standard is ECMA-262 Edition 3 and ECMAScript for XML (E4X) with some additional features. Several new features were introduced: E4X, several new Array methods, and Array and String generics.
780	New in JavaScript 1.7	JavaScript, Versions
		The following is a changelog for JavaScript 1.7. This version was included in Firefox 2 (October 2006).
781	New in JavaScript 1.8	JavaScript, Versions
		The following is a changelog for JavaScript 1.8. This version was included in Firefox 3 and is part of Gecko 1.9. See bug 380236 for a tracking development bug for JavaScript 1.8.
782	New in JavaScript 1.8.1	Firefox 3.5, JavaScript, Versions
		The following is a changelog for JavaScript 1.8.1. This version was included in Firefox 3.5.
783	New in JavaScript 1.8.5	ECMAScript5, Firefox 4, JavaScript, JavaScript 1.8.5, Versions
		The following is a changelog for JavaScript 1.8.5. This version was included in Firefox 4.
784	SIMD types	JavaScript, SIMD
		The experimental JavaScript SIMD API introduces vector objects that utilize SIMD/SSE instructions on supporting CPUs; SIMD is short for Single Instruction/Multiple Data. SIMD operations are methods that process multiple data with a single instruction. In contrary, scalar operations (SISD) process only one individual data with a single instruction.
785	The performance hazards of [[Prototype]] mutation	JavaScript, Performance, performance