JavaScript Guide

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.

Chapters

This Guide is divided into several chapters:

• Introduction

  About this guide
  About JavaScript
  JavaScript and Java
  ECMAScript
  Tools
  Hello World

• Grammar and types

  Basic syntax & comments
  Declarations
  Variable scope
  Variable hoisting
  Data structures and types
  Literals

• Control flow and error handling

  if...else
switch
try/catch/throw
  Error objects
  Promises

• Loops and iteration

  for
while
do...while
break/continue
for..in
for..of

• Functions

  Defining functions
  Calling functions
  Function scope
  Closures
  Arguments & parameters
  Arrow functions

• Expressions and operators

  Assignment & Comparisons
  Arithmetic operators
  Bitwise & logical operators
  Conditional (ternary) operator

• Numbers and dates Number literals

  Number object
  Math object
  Date object

• Text formatting

  String literals
  String object
  Template literals
  Internationalization
  Regular Expressions

• Indexed collections

  Arrays
  Typed arrays

• Keyed collections

  Map
WeakMap
Set
WeakSet

• Working with objects

  Objects and properties
  Creating objects
  Defining methods
  Getter and setter

• Details of the object model

  Prototype-based OOP
  Creating object hierarchies
  Inheritance

• Iterators and generators

  Iterators
  Iterables
  Generators

• Meta programming

  Proxy
  Handlers and traps
  Revocable Proxy
  Reflect