Angular

Setup a local development environment

The QuickStart live-coding example is an Angular playground. It's not where you'd develop a real application. You should develop locally on your own machine ... and that's also how we think you should learn Angular.

Setting up a new project on your machine is quick and easy with the QuickStart seed, maintained on github.

The QuickStart seed live-example is QuickStart plus the app.module.ts and main.ts application files (described below) that facilitate richer application examples.

Make sure you have node and npm installed. Then ...

Create a project folder (you can call it quickstart and rename it later).
Clone or download the QuickStart seed into your project folder.
Install npm packages.
Run npm start to launch the sample application.

Clone

Perform the clone-to-launch steps with these terminal commands.

git clone https://github.com/angular/quickstart.git quickstart cd quickstart npm install npm start

Download

Download the QuickStart seed and unzip it into your project folder. Then perform the remaining steps with these terminal commands.

cd quickstart npm install npm start

What's in the QuickStart seed?

The QuickStart seed contains the same application as the QuickStart playground. But it's true purpose is to provide a solid foundation for local development. Consequently, there are many more files in the project folder on your machine, most of which you can learn about later.

Focus on the following three TypeScript (.ts) files in the /app folder.

app

app.component.ts

app.module.ts

main.ts

import { Component } from '@angular/core'; @Component({ selector: 'my-app', template: `<h1>Hello {{name}}</h1>` }) export class AppComponent { name = 'Angular'; }

import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { AppComponent } from './app.component'; @NgModule({ imports: [ BrowserModule ], declarations: [ AppComponent ], bootstrap: [ AppComponent ] }) export class AppModule { }

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { AppModule } from './app.module'; platformBrowserDynamic().bootstrapModule(AppModule);

All guides and cookbooks have at least these core files. Each file has a distinct purpose and evolves independently as the application grows.

File	Purpose
app.component.ts	Defines the same `AppComponent` as the one in the QuickStart playground. It is the root component of what will become a tree of nested components as the application evolves.
`app.module.ts`	Defines `AppModule`, the root module that tells Angular how to assemble the application. Right now it declares only the `AppComponent`. Soon there will be more components to declare.
main.ts	Compiles the application with the JIT compiler and bootstraps the application to run in the browser. That's a reasonable choice for the development of most projects and it's the only viable choice for a sample running in a live-coding environment like Plunker. You'll learn about alternative compiling and deployment options later in the documentation.

Next Step

If you're new to Angular, we recommend staying on the learning path.

Appendix: node and npm

Node.js and npm are essential to modern web development with Angular and other platforms. Node powers client development and build tools. The npm package manager, itself a node application, installs JavaScript libraries.

Get them now if they're not already installed on your machine.

Verify that you are running node v4.x.x or higher and npm 3.x.x or higher by running the commands node -v and npm -v in a terminal/console window. Older versions produce errors.

We recommend nvm for managing multiple versions of node and npm. You may need nvm if you already have projects running on your machine that use other versions of node and npm.

Appendix: Why develop locally

Live coding in the browser is a great way to explore Angular.

Links on almost every documentation page open completed samples in the browser. You can play with the sample code, share your changes with friends, and download and run the code on your own machine.

The QuickStart shows just the AppComponent file. It creates the equivalent of app.module.ts and main.ts internally for the playground only. so the reader can discover Angular without distraction. The other samples are based on the QuickStart seed.

As much fun as this is ...

you can't ship your app in plunker
you aren't always online when writing code
transpiling TypeScript in the browser is slow
the type support, refactoring, and code completion only work in your local IDE

Use the live coding environment as a playground, a place to try the documentation samples and experiment on your own. It's the perfect place to reproduce a bug when you want to file a documentation issue or file an issue with Angular itself.

For real development, we strongly recommend developing locally.