angular-docs-cn/public/docs/js/latest/guide/setup.jade

.l-main-section
  p.
    <strong>Mission:</strong> By the end of this chapter, you should be able to get an Angular 2 component to appear on
    the page.

  .l-sub-section
    h3#section-examples Examples:
      ul
        li
          a(href='http://plnkr.co/edit/MRz2i7sjupzxERPAa3SF?p=preview') TypeScript
        li
          a(href='http://plnkr.co/edit/wzzKo4etk24t0oAnL6ep?p=preview') ES5

.l-main-section
  h2#section-install-or-plunker Install Angular or Use Plunker
  p There are four steps to create any Angular app:
  ol
    li Create an entry point HTML file where users will start
    li Load the Angular library at the top of the file
    li Make a root component for your application
    li Bootstrap Angular

  p.
    You can edit and test out your apps either though serving local files through a web server or through a service like
    Plunker.

  p.
    For Plunker, just use the <a href="http://plnkr.co/edit/?p=preview">starter template</a> to get going.  If you're
    serving local files, edit and save them and start a web server that serves files in that directory.  If you have
    Python installed, you can run a basic HTTP server from the root of your code directory with:

  pre.prettyprint.lang-bash
    code python -m SimpleHTTPServer 8000

.l-main-section
  h2#section-create-an-entry-point Create an entry point
  p.
    Create an <code>index.html</code> file and add the Angular library tags and a <code>main.js</code> file where
    you'll build your first component.

  p.
    In the <code>&lt;body&gt;</code>, add an element called <code>&lt;my-app&gt;</code> that will be the root of your
    application.

  pre.prettyprint.lang-html
    code.
      //ES5
      &lt;!DOCTYPE html&gt;
      &lt;html&gt;
        &lt;head&gt;
          &lt;script src=&quot;https://code.angularjs.org/2.0.0-alpha.19/angular2.sfx.dev.js&quot;&gt;&lt;/script&gt;
          &lt;script src=&quot;main.js&quot;&gt;&lt;/script&gt;
        &lt;/head&gt;
        &lt;body&gt;
        &lt;/body&gt;
      &lt;/html&gt;

  pre.prettyprint.lang-html
    code.
      //TypeScript
      &lt;!DOCTYPE html&gt;
      &lt;html&gt;
        &lt;head&gt;
          &lt;link rel=&quot;stylesheet&quot; href=&quot;style.css&quot;&gt;
          &lt;script src=&quot;https://jspm.io/system@0.16.js&quot;&gt;&lt;/script&gt;
          &lt;script src=&quot;https://code.angularjs.org/2.0.0-alpha.19/angular2.dev.js&quot;&gt;&lt;/script&gt;
        &lt;/head&gt;
        &lt;body&gt;
          &lt;my-app&gt;&lt;/my-app&gt;
          &lt;script&gt;
            System.config({
              paths: {
                &#39;*&#39;: &#39;*.js&#39;,
                &#39;angular2/*&#39;: &#39;angular2/*&#39;,
              }
            });
            System.import(&#39;main&#39;);
          &lt;/script&gt;
        &lt;/body&gt;
      &lt;/html&gt;

.callout.is-helpful
  header Don't use code.angularjs.org in a live app
  p.
    This example serves the Angular library from <a href="http://code.angularjs.org">code.angularjs.org</a>. This is
    fine for examples, but you'd want to serve it yourself or use a CDN for real deployment.

.l-main-section
  h2#section-set-up-the-starting-component Set up the starting component

  p.
    In <code>main.js</code>, create a class called <code>AppComponent</code>, configure it to bind to the
    <code>&lt;my-app&gt;</code> element in <code>index.html</code>, and call Angular's <code>bootstrap()</code> to kick
    it all off like this:

  pre.prettyprint.lang-javascript
    code.
      //ES5
      function AppComponent() {}

      AppComponent.annotations = [
        new angular.Component({
          selector: 'my-app'
        }),
        new angular.View({
          template: '&lt;h1&gt;My first Angular 2 App&lt;/h1&gt;'
        })
      ];

      document.addEventListener('DOMContentLoaded', function() {
        angular.bootstrap(AppComponent);
      });

  pre.prettyprint.lang-typescript
    code.
      //TypeScript
      import {Component, View, bootstrap} from 'angular2/angular2';

      @Component({
        selector: 'my-app'
      })
      @View({
        template: '&lt;h1&gt;My first Angular 2 App&lt;/h1&gt;'
      })
      class AppComponent {
      }

      bootstrap(AppComponent);

.l-main-section
  h2#section-run-it Run it!

  p.
    Open <code>index.html</code> through your web server or hit the <strong>Run</strong> button if using Plunker and
    you should see:
  div(align='center')
    img(src='setup-example1.png')

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  h2#section-explanations Explanations

  p This basic Angular app contains the structure for any app you'll build.

  p.
    You can think of Angular apps as a tree of components.  This root component we've been talking about acts as the top
    level container for the rest of your application.  You've named this one <code>AppComponent</code>, but there's
    nothing special about the name and you can use whatever makes sense to you.

  p.
    The root component's job is to give a location in the <code>index.html</code> file where your application will
    render through it's element, in this case <code>&lt;my-app&gt;</code>.  There is also nothing special about this
    element name and you can pick it as you like.

  p.
    The root component loads the initial template for the application that will load other components to perform
    whatever functions your application needs - menu bars, views, forms, etc.  We'll walk through examples of all of
    these in the following pages.

  p Exciting!  Not excited yet?  Let's move on to <a href="displaying-data.html">Displaying Data</a>.