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David East 2015-03-02 16:53:46 -08:00
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h2#section-transpile 2. Import Angular h2#section-transpile 2. Import Angular
p. p.
Create a file named <code>app.es6</code> at the root of the project. This quickstart will consist of two files, an <code>index.html</code> and a
<code>app.es6</code>. Both of these files will be at the root of the project.
The <code>.es6</code> extension signifies that the file uses ES6 syntax. The <code>.es6</code> extension signifies that the file uses ES6 syntax.
Using the ES6 module syntax you can import the required modules from Angular2. Using the ES6 module syntax you can import the required modules from Angular2.
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code import {Component, Template, bootstrap} from 'angular2/angular2'; code import {Component, Template, bootstrap} from 'angular2/angular2';
p The above import statement will import the three modules from Angular. These modules load at runtime. p The above import statement will import three modules from Angular. These modules load at runtime.
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p. p.
Components are custom HTML elements. Angular uses components to empower HTML. Components are custom HTML elements. Angular uses components to empower HTML.
Components structure and repre.prettyprint.linenumssent the UI. This quickstart Components structure and repre.prettyprint.linenumssent the UI. This quickstart
demonstrates the process of creating a component. This component will have the tag of app. demonstrates the process of creating a component. This component will have the tag of app,
<code>&lt;my-app&gt;&lt;/my-app&gt;</code>.
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code &lt;app&gt;&lt;/app&gt;
p A component consists of two parts; the annotation section and the component controller. p A component consists of two parts; the annotation section and the component controller.
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code. code.
// app.es6
import {Component, Template, bootstrap} from 'angular2/angular2'; import {Component, Template, bootstrap} from 'angular2/angular2';
// Annotation Section // Annotation Section
@Component({ @Component({
selector: 'app' selector: 'my-app'
}) })
@Template({ @Template({
inline: ` inline: `
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` `
}) })
// Component Controller // Component Controller
class AppComponent { class MyAppComponent {
constructor() { constructor() {
this.name = "Alice"; this.name = "Alice";
} }
} }
// Render the app to the page
bootstrap(MyAppComponent);
.l-sub-section .l-sub-section
h3 Component Annotations h3 Component Annotations
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A component annotation provides meta-data about the <code>component</code>. A component annotation provides meta-data about the <code>component</code>.
An annotation can always identified by its at-sign — <code>@</code>. An annotation can always identified by its at-sign — <code>@</code>.
p. p.
The <code>@Component</code> annotation defines the HTML tag for the component. The <code>@Component</code> annotation defines the HTML tag for the component. The <code>@Component</code>
annotation is imported in the first line of <code>app.es6</code>.
The selector property specifies the tag. The <code>selector</code> property is a CSS selector. The selector property specifies the tag. The <code>selector</code> property is a CSS selector.
p. p.
The <code>@Template</code> annotation defines the template to apply to the The <code>@Template</code> annotation defines the template to apply to the The <code>@Template</code>
annotation is imported in the first line of <code>app.es6</code>.
component. This component uses an inline template, but external templates are component. This component uses an inline template, but external templates are
available as well. To use an external template specify a <code>url</code> property available as well. To use an external template specify a <code>url</code> property
and give it the path to the html file. and give it the path to the html file.
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code. code.
@Component({ @Component({
selector: 'app' selector: 'app' // Defines the &lt;my-app&gt;&lt;/my-app&gt; tag
}) })
@Template({ @Template({
inline: ` inline: `&lt;h1&gt;Hello {{ name }}&lt;/h1&gt;` // Defines the inline template for the component
&lt;h1&gt;Hello {{ name }}&lt;/h1&gt;
`
}) })
p. p.
The component created above has a HTML tag of <code>&lt;app&gt;&lt;/app&gt;</code> The component created above has a HTML tag of <code>&lt;app&gt;&lt;/app&gt;</code>
and a template of <code>&lt;h1&gt;Hello {{ name }}&lt;/h1&gt;</code>. and a template of <code>&lt;h1&gt;Hello <code>{{</code> name }}&lt;/h1&gt;</code>.
.l-sub-section .l-sub-section
h3 Component Controller h3 Component Controller
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code code
class AppComponent { | class MyAppComponent {
constructor() { | constructor() {
this.name = "Alice"; | this.name = "Alice";
} | }
} | }
p. p.
Templates read from their component controllers. Templates have access to any properties Templates read from their component controllers. Templates have access to any properties
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component will render as well. component will render as well.
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code bootstrap(AppComponent); code bootstrap(MyAppComponent);
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code. code.
&lt;!-- index.html --&gt;
&lt;html&gt; &lt;html&gt;
&lt;head&gt; &lt;head&gt;
&lt;title&gt;Angular 2 Quickstart&lt;/title&gt; &lt;title&gt;Angular 2 Quickstart&lt;/title&gt;
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&lt;body&gt; &lt;body&gt;
<!-- --> <!-- -->
&lt;!-- The app component created in app.es6 --&gt; &lt;!-- The app component created in app.es6 --&gt;
&lt;app&gt;&lt;/app&gt; &lt;my-app&gt;&lt;/my-app&gt;
<!-- --> <!-- -->
&lt;/body&gt; &lt;/body&gt;
&lt;/html&gt; &lt;/html&gt;
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.l-sub-section .l-sub-section
h3 Load the component module h3 Load the component module
p. p.
The last step is to load the module for the app component. The last step is to load the module for the my-app component.
The es6-shim file comes packaged with the System library. The es6-shim file comes packaged with the System library.
Most browsers today do not support ES6 module loading. System Most browsers today do not support ES6 module loading. System
provides module loading functionality to these browsers. provides module loading functionality to these browsers.
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ol ol
li Angular - The Angular framework. li Angular - The Angular framework.
li Runtime assertions - Optional assertions for runtime type checking. li Runtime assertions - Optional assertions for runtime type checking.
li The app component created above - The component to display on the page. li The my-app component created above - The component to display on the page.
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code. code.
&lt;!-- index.html --&gt;
&lt;html&gt; &lt;html&gt;
&lt;head&gt; &lt;head&gt;
&lt;title&gt;Angular 2 Quickstart&lt;/title&gt; &lt;title&gt;Angular 2 Quickstart&lt;/title&gt;
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&lt;/head&gt; &lt;/head&gt;
&lt;body&gt; &lt;body&gt;
&lt;!-- The app component created in app.es6 --&gt; &lt;!-- The my-app component created in app.es6 --&gt;
&lt;app&gt;&lt;/app&gt; &lt;my-app&gt;&lt;/my-app&gt;
&lt;script&gt; &lt;script&gt;
// Rewrite the paths to load the files // Rewrite the paths to load the files
System.paths = { System.paths = {
'angular2/*':'/es6-shim/angular2/*.js', 'angular2/*':'/es6-shim/angular2/*.js', // Angular
'rtts_assert/*': '/es6-shim/rtts_assert/*.js', 'rtts_assert/*': '/es6-shim/rtts_assert/*.js', //Runtime assertions
'app': 'app.es6' 'app': 'app.es6' // The my-app component
}; };
// Kick off the application // Kick off the application