docs(guide/template-syntax): Dart version of the sample

closes #377
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Tom Ingebretsen 2015-11-15 23:38:50 -07:00 committed by Kathy Walrath
parent f54ae8b306
commit 14de4228fc
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// #docregion
library template_syntax.app_component;
import 'dart:html';
import 'dart:convert';
import 'package:angular2/angular2.dart';
import 'package:template_syntax/hero.dart';
import 'package:template_syntax/hero_detail_component.dart';
import 'package:template_syntax/my_click_directive.dart';
enum _Color { Red, Green, Blue }
@Component(
selector: 'my-app',
templateUrl: 'app_component.html',
directives: const [
HeroDetailComponent,
BigHeroDetailComponent,
MyClickDirective,
MyClickDirective2
])
class AppComponent {
String heroName;
String help;
String actionName = 'Go for it';
String title = 'Template Syntax';
String heroImageUrl = 'assets/images/hero.png';
String villainImageUrl = 'assets/images/villain.png';
String iconUrl = 'assets/images/ng-logo.png';
String chosenToe;
int val = 2;
bool canSave = true;
bool isActive = false;
bool isSpecial = true;
bool isUnchanged = true;
bool isSelected = false;
_Color color = _Color.Red;
List<Hero> heroes = Hero.MockHeroes;
Hero selectedHero = Hero.MockHeroes[0];
Hero currentHero = Hero.MockHeroes[0];
Hero nullHero = null;
Map product = {'name': 'frimfram', 'price': 42};
Event clickity;
FormElement form;
Map classes = {
'saveable': false, // true
'modified': false, // false
'special': false // true
};
Map styles = {
'font-style': 'normal',
'font-weight': 'normal',
'font-size': 'smaller'
};
Map styles2 = {
'fontStyle': 'normal',
'fontWeight': 'normal',
'fontSize': 'smaller'
};
void alerter(String msg) => window.alert(msg);
void callFax(String value) => alerter('Faxing $value ...');
void callPhone(String value) => alerter('Calling $value ...');
void colorToggle() {
color = color == _Color.Red ? _Color.Blue : _Color.Red;
}
int get getVal => val;
void onCancel(MouseEvent event) {
DivElement el = event.target;
var evtMsg = event != null ? 'Event target is ${el.innerHtml}' : '';
alerter('Canceled. $evtMsg');
}
void onClickMe(MouseEvent event) {
DivElement el = event.target;
var evtMsg = event != null ? 'Event target class is ${el.className}' : '';
alerter('Click me. $evtMsg');
}
bool onSave([MouseEvent event = null]) {
var evtMsg =
event != null ? ' Event target is ${event.target.innerHtml}' : '';
alerter('Saved.$evtMsg');
return false;
}
void onHeroDeleted(Hero hero) => alerter('Deleted hero: ${hero.firstName}');
void onSubmit(NgForm form) {
var evtMsg = form.valid
? ' Form value is ${JSON.encode(form.value)}'
: ' Form is invalid';
alerter('Form submitted. $evtMsg');
}
void setUpperCaseFirstName(String firstName) {
currentHero.firstName = firstName.toUpperCase();
}
String getStyles(Element el) {
var showStyles = setStyles();
return JSON.encode(showStyles);
}
// #docregion setStyles
Map setStyles() {
styles['font-style'] = canSave ? 'italic' : 'normal';
styles['font-weight'] = !isUnchanged ? 'bold' : 'normal';
styles['font-size'] = isSpecial ? 'x-large' : 'smaller';
return styles;
}
// #enddocregion setStyles
// #docregion setStyles2
Map setStyles2() {
// camelCase style properties work too [PENDING: no, they don't]
styles2['fontStyle'] = canSave ? 'italic' : 'normal';
styles2['fontWeight'] = !isUnchanged ? 'bold' : 'normal';
styles2['fontSize'] = isSpecial ? 'x-large' : 'smaller';
return styles2;
}
// #enddocregion setStyles2
Map setClasses() {
classes['saveable'] = canSave;
classes['modified'] = !isUnchanged;
classes['special'] = isSpecial;
return classes;
}
String toeChooser(Element picker) {
List<Element> choices = picker.children;
for (var i = 0; i < choices.length; i++) {
var choice = choices[i];
if (choice.checked) {
chosenToe = choice.value;
return chosenToe;
}
}
}
}

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<!-- #docregion my-first-app -->
<h3>My First Angular Application</h3>
<!-- #enddocregion my-first-app -->
<!-- Interpolation and expressions -->
<hr><h2>Interpolation</h2>
<!-- #docregion first-interpolation -->
<p>My current hero is {{currentHero.firstName}}</p>
<!-- #enddocregion first-interpolation -->
<!-- #docregion title+image -->
<h3>
{{title}}
<img src="{{heroImageUrl}}" style="height:30px">
</h3>
<!-- #enddocregion title+image -->
<!-- #docregion sum-1 -->
<!-- "The sum of 1 + 1 is 2" -->
<p>The sum of 1 + 1 is {{1 + 1}}</p>
<!-- #enddocregion sum-1 -->
<!-- #docregion sum-2 -->
<!-- "The sum of 1 + 1 is not 4" -->
<p>The sum of 1 + 1 is not {{1 + 1 + getVal}}</p>
<!-- #enddocregion sum-2 -->
<!-- New Mental Model -->
<hr><h2>New Mental Model</h2>
<!--<img src="http://www.wpclipart.com/cartoon/people/hero/hero_silhoutte_T.png">-->
<!-- Public Domain terms of use: http://www.wpclipart.com/terms.html -->
<!-- #docregion img+button -->
<div class="special">Mental Model</div>
<div><b>{{currentHero.fullName}}</b></div>
<img src="assets/images/hero.png">
<button disabled>Save</button>
<!-- #enddocregion img+button -->
<br><br>
<div>
<!-- #docregion hero-detail-1 -->
<div class="special">Mental Model</div>
<hero-detail></hero-detail>
<!-- #enddocregion hero-detail-1 -->
</div>
<br><br>
<div>
<!-- #docregion disabled-button-1 -->
<!-- Bind button disabled state to `isUnchanged` property -->
<button [disabled]="isUnchanged">Save</button>
<!-- #enddocregion disabled-button-1 -->
</div>
<br><br>
<div>
<!-- #docregion property-binding-syntax-1 -->
<img [src] = "heroImageUrl">
<hero-detail [hero]="currentHero"></hero-detail>
<div [ngClass] = "{selected: isSelected}"></div>
<!-- #enddocregion property-binding-syntax-1 -->
</div>
<br><br>
<!-- See https://github.com/angular/angular/issues/5707 about "myClick (myClick)" -->
<!-- #docregion event-binding-syntax-1 -->
<button (click) = "onSave()">Save</button>
<hero-detail (deleted)="onHeroDeleted()"></hero-detail>
<div myClick (myClick)="clicked=$event">click me</div>
<!-- #enddocregion event-binding-syntax-1 -->
<!-- {{clicked}} --> <!-- causes exception in Dart version -->
<br><br>
<div>
<!-- #docregion 2-way-binding-syntax-1 -->
<input [(ngModel)]="heroName">
<!-- #enddocregion 2-way-binding-syntax-1 -->
Hero Name: {{heroName}}
</div>
<br><br>
<!-- #docregion attribute-binding-syntax-1 -->
<button [attr.aria-label]="help">help</button>
<!-- #enddocregion attribute-binding-syntax-1 -->
<br><br>
<!-- #docregion class-binding-syntax-1 -->
<div [class.special]="isSpecial">Special</div>
<!-- #enddocregion class-binding-syntax-1 -->
<br><br>
<!-- #docregion style-binding-syntax-1 -->
<button [style.color] = "isSpecial ? 'red' : 'green'">
<!-- #enddocregion style-binding-syntax-1 -->
button</button>
<!-- property vs. attribute -->
<hr><h2>Property vs. Attribute (img examples)</h2>
<!-- examine the following <img> tag in the browser tools -->
<img src="assets/images/ng-logo.png"
[src]="heroImageUrl">
<br><br>
<img [src]="iconUrl"/>
<img bind-src="heroImageUrl"/>
<img [attr.src]="villainImageUrl"/>
<!-- buttons -->
<hr><h2>Buttons</h2>
<button>Enabled (but does nothing)</button>
<button disabled>Disabled</button>
<button disabled=false>Still disabled</button>
<br><br>
<button disabled>disabled by attribute</button>
<button [disabled]="isUnchanged">disabled by property binding</button>
<br><br>
<button bind-disabled="isUnchanged" on-click="onSave($event)">Disabled Cancel</button>
<button [disabled]="!canSave" (click)="onSave($event)">Enabled Save</button>
<!-- property binding -->
<hr><h2>Property Binding</h2>
<!-- #docregion property-binding-1 -->
<img [src]="heroImageUrl">
<!-- #enddocregion property-binding-1 -->
<!-- #docregion property-binding-2 -->
<button [disabled]="isUnchanged">Cancel</button>
<!-- #enddocregion property-binding-2 -->
<!-- #docregion property-binding-3 -->
<div [ngClass]="'special'">NgClass is special</div>
<!-- #enddocregion property-binding-3 -->
<!-- #docregion property-binding-4 -->
<hero-detail [hero]="selectedHero"></hero-detail>
<!-- #enddocregion property-binding-4 -->
<!-- #docregion property-binding-5 -->
<img bind-src="heroImageUrl">
<!-- #enddocregion property-binding-5 -->
<!-- #docregion property-binding-6 -->
<!-- Doesn't work! HeroDetailComponent expects a Hero, not a string -->
<!--<hero-detail hero="…what do we do here??? …"></hero-detail>--> <!--THROWS ERROR IN DART-->
<!-- #enddocregion property-binding-6 -->
<!-- #docregion property-binding-vs-interpolation -->
<img src="{{heroImageUrl}}">
<img [src]="'' + heroImageUrl">
<div>The title is {{title}}</div>
<div [textContent]="'The title is '+title"></div>
<!-- #enddocregion property-binding-vs-interpolation -->
<!-- attribute binding -->
<hr><h2>Attribute Binding</h2>
<!-- create and set a colspan attribute -->
<!-- #docregion attrib-binding-colspan -->
<table border=1>
<!-- expression calculates colspan=2 -->
<tr><td [attr.colspan]="1 + 1">One-Two</td></tr>
<!-- ERROR: There is no `colspan` property to set!
<tr><td colspan="{{1 + 1}}">Three-Four</td></tr>
-->
<tr><td>Five</td><td>Six</td></tr>
</table>
<!-- #enddocregion attrib-binding-colspan -->
<br>
<!-- #docregion attrib-binding-aria -->
<!-- create and set an aria attribute for assistive technology -->
<button [attr.aria-label]="actionName">{{actionName}} with Aria</button>
<!-- #enddocregion attrib-binding-aria -->
<br><br>
<!-- The following effects are not discussed in the chapter -->
<div>
<!-- any use of [attr.disabled] creates the disabled attribute -->
<button [attr.disabled]="isUnchanged">Disabled</button>
<button [attr.disabled]="!isUnchanged">Disabled as well</button>
<!-- can't remove it with [attr.disabled] either -->
<button disabled [attr.disabled]>Still disabled</button>
<!-- we'd have to remove it with property binding -->
<button disabled [disabled]="false">Enabled (but inert)</button>
</div>
<!-- class binding -->
<hr><h2>Class Binding</h2>
<!-- #docregion class-binding-1 -->
<!-- standard class attribute setting -->
<div class="bad curly special">Bad curly special</div>
<!-- #enddocregion class-binding-1 -->
<!-- #docregion class-binding-2 -->
<!-- reset all class names with a string binding -->
<div class="bad curly special"
[class]="'bad curly'">Bad curly</div>
<!-- #enddocregion class-binding-2 -->
<!-- #docregion class-binding-3 -->
<!-- #docregion class-binding-3a -->
<!-- toggle the "special" class on/off with a property -->
<div [class.special]="isSpecial">The class binding is special</div>
<!-- #enddocregion class-binding-3a -->
<!-- binding to `class.special` trumps the class attribute -->
<div class="special"
[class.special]="!isSpecial">This one is not so special</div>
<!-- #enddocregion class-binding-3 -->
<div bind-class.special="isSpecial">This class binding is special too</div>
<!--style binding -->
<hr><h2>Style Binding</h2>
<!-- #docregion style-binding-1 -->
<button [style.color] = "isSpecial ? 'red': 'green'">Red</button>
<button [style.background-color]="canSave ? 'cyan': 'grey'" >Save</button>
<!-- #enddocregion style-binding-1 -->
<!-- #docregion style-binding-2 -->
<button [style.font-size.em]="isSpecial ? 3 : 1" >Big</button>
<button [style.font-size.%]="!isSpecial ? 150 : 50" >Small</button>
<!-- #enddocregion style-binding-2 -->
<!-- event binding -->
<hr><h2>Event Binding</h2>
<!-- #docregion event-binding-1 -->
<button (click)="onSave()">Save</button>
<!-- #enddocregion event-binding-1 -->
<!-- #docregion event-binding-2 -->
<button on-click="onSave()">On Save</button>
<!-- #enddocregion event-binding-2 -->
<div>
<!-- #docregion event-binding-3 -->
<!-- `myClick` is an event on the custom `MyClickDirective` -->
<!-- #docregion my-click -->
<div myClick (myClick)="clickity=$event">click with myClick</div>
<!-- #enddocregion my-click -->
<!-- #enddocregion event-binding-3 -->
{{clickity}}
</div>
<!-- binding to a nested component -->
<!-- #docregion event-binding-to-component -->
<hero-detail (deleted)="onHeroDeleted($event)" [hero]="currentHero">
</hero-detail>
<!-- #enddocregion event-binding-to-component -->
<br>
<big-hero-detail
(deleted)="onHeroDeleted($event)"
[hero]="currentHero">
</big-hero-detail>
<!-- #docregion event-binding-bubbling -->
<div class="parent-div" (click)="onClickMe($event)">Click me
<div class="child-div">Click me too!</div>
</div>
<!-- #enddocregion event-binding-bubbling -->
<br><br>
<!-- #docregion event-binding-no-propagation -->
<!-- Will save only once -->
<div (click)="onSave()">
<button (click)="onSave()">Save, no propagation</button>
</div>
<!-- #enddocregion event-binding-no-propagation -->
<br><br>
<!-- #docregion event-binding-propagation -->
<!-- Will save twice -->
<div (click)="onSave()">
<button (click)="onSave() || true">Save w/ propagation</button>
</div>
<!-- #enddocregion event-binding-propagation -->
<br><br>
<!-- Two way data binding unwound;
passing the changed display value to the event handler via `$event` -->
<hr><h2>NgModel Binding</h2>
<h3>Result: {{currentHero.firstName}}</h3>
<!-- #docregion without-NgModel -->
<input [value]="currentHero.firstName"
(input)="currentHero.firstName=$event.target.value" >
<!-- #enddocregion without-NgModel -->
without NgModel
<br>
<!-- #docregion NgModel-1 -->
<input [(ngModel)]="currentHero.firstName">
<!-- #enddocregion NgModel-1 -->
[(ngModel)]
<br>
<!-- #docregion NgModel-2 -->
<input bindon-ngModel="currentHero.firstName">
<!-- #enddocregion NgModel-2 -->
bindon-ngModel
<br>
<!-- #docregion NgModel-3 -->
<input
[ngModel]="currentHero.firstName"
(ngModelChange)="currentHero.firstName=$event">
<!-- #enddocregion NgModel-3 -->
(ngModelChange) = "...firstName=$event"
<br>
<!-- #docregion NgModel-4 -->
<input
[ngModel]="currentHero.firstName"
(ngModelChange)="setUpperCaseFirstName($event)">
<!-- #enddocregion NgModel-4 -->
(ngModelChange) = "setUpperCaseFirstName($event)"
<br>
<!-- NgClass binding -->
<hr><h2>NgClass Binding</h2>
<p>setClasses returns {{setClasses() | json}}</p>
<!-- #docregion NgClass-1 -->
<div [ngClass]="setClasses()">This div is saveable and special</div>
<!-- #enddocregion NgClass-1 -->
<div [ngClass]="setClasses()" #classDiv>
After setClasses(), the classes are "{{classDiv.className}}"
</div>
<!-- not used in chapter -->
<div [ngClass]="isSpecial ? 'special' : ''">This div is special</div>
<div class="bad curly special">Bad curly special</div>
<div [ngClass]="{bad:false, curly:true, special:true}">Curly special</div>
<!-- NgStyle binding -->
<hr><h2>NgStyle Binding</h2>
<!-- #docregion NgStyle-1 -->
<div [style.font-size]="isSpecial ? 'x-large' : 'smaller'" >
This div is x-large
</div>
<!-- #enddocregion NgStyle-1 -->
<h3>Use setStyles() - CSS property names</h3>
<p>setStyles returns {{setStyles() | json}}</p>
<!-- #docregion NgStyle-2 -->
<div [ngStyle]="setStyles()">
This div is italic, normal weight, and x-large
</div>
<!-- #enddocregion NgStyle-2 -->
<div [ngStyle]="setStyles()" #styleDiv>
After setStyles(), the styles are "{{getStyles(styleDiv)}}"
</div>
<h3>Use setStyles2() - camelCase style property names</h3>
<p>setStyles2 returns {{setStyles2() | json}}</p>
<!-- #docregion NgStyle-3 -->
<div [ngStyle]="setStyles2()">
This div is italic, normal weight, and x-large
</div>
<!-- #enddocregion NgStyle-3 -->
<div [ngStyle]="setStyles2()" #styleDiv2>
After setStyles2(), the styles are "{{getStyles(styleDiv2)}}"
</div>
<!-- not used in chapter -->
<!-- NgIf binding -->
<hr><h2>NgIf Binding</h2>
<!-- #docregion NgIf-1 -->
<div *ngIf="currentHero != null">Hello, {{currentHero.firstName}}</div>
<!-- #enddocregion NgIf-1 -->
<!-- #docregion NgIf-2 -->
<!-- not displayed because nullHero is falsey.
`nullHero.firstName` never has a chance to fail -->
<div *ngIf="nullHero != null">Hello, {{nullHero.firstName}}</div>
<!-- Hero Detail is not in the DOM because isActive is false-->
<hero-detail *ngIf="isActive"></hero-detail>
<!-- #enddocregion NgIf-2 -->
<!-- NgIf binding with template (no *) -->
<template [ngIf]="currentHero != null">Add {{currentHero.firstName}} with template</template>
<!-- Does not show because isActive is false! -->
<div>Hero Detail removed from DOM (via template) because isActive is false</div>
<template [ngIf]="isActive">
<hero-detail></hero-detail>
</template>
<!-- #docregion NgIf-3 -->
<!-- isSpecial is true -->
<div [class.hidden]="!isSpecial">Show with class</div>
<div [class.hidden]="isSpecial">Hide with class</div>
<!-- HeroDetail is in the DOM but hidden -->
<hero-detail [class.hidden]="isSpecial"></hero-detail>
<div [style.display]="isSpecial ? 'block' : 'none'">Show with style</div>
<div [style.display]="isSpecial ? 'none' : 'block'">Hide with style</div>
<!-- #enddocregion NgIf-3 -->
<!-- NgSwitch binding -->
<hr><h2>NgSwitch Binding</h2>
<fieldset #toePicker (click)="toeChooser(toePicker)" >
<input type="radio" name="toes" value="Eenie">Eenie
<input type="radio" name="toes" value="Meanie">Meanie
<input type="radio" name="toes" value="Miney">Miney
<input type="radio" name="toes" value="Moe">Moe
<input type="radio" name="toes" value="???">???
</fieldset>
<div class="toe">
<div *ngIf="chosenToe == null">Pick a toe</div>
<div *ngIf="chosenToe != null">You picked
<!-- #docregion NgSwitch -->
<span [ngSwitch]="chosenToe">
<template [ngSwitchWhen]="'Eenie'">Eenie</template>
<template [ngSwitchWhen]="'Meanie'">Meanie</template>
<template [ngSwitchWhen]="'Miney'">Miney</template>
<template [ngSwitchWhen]="'Moe'">Moe</template>
<template ngSwitchDefault>Other</template>
</span>
<!-- #enddocregion NgSwitch -->
</div>
</div>
<!-- NgFor binding -->
<hr><h2>NgFor Binding</h2>
<div class="box">
<!-- #docregion NgFor-1 -->
<div *ngFor="#hero of heroes">{{hero.fullName}}</div>
<!-- #enddocregion NgFor-1 -->
</div>
<br>
<div class="box">
<!-- *ngFor w/ hero-detail Component -->
<!-- #docregion NgFor-2 -->
<hero-detail *ngFor="#hero of heroes" [hero]="hero"></hero-detail>
<!-- #enddocregion NgFor-2 -->
</div>
<br>
<div class="box">
<!-- #docregion NgFor-3 -->
<!-- Ex: 1 - Hercules Son of Zeus -->
<div *ngFor="#hero of heroes, #i=index">{{i + 1}} - {{hero.fullName}}</div>
<!-- #enddocregion NgFor-3 -->
</div>
<br>
<!-- * and template -->
<hr><h2>* and Template</h2>
<h3>NgIf expansion</h3>
<!-- #docregion Template-1 -->
<hero-detail *ngIf="currentHero != null" [hero]="currentHero"></hero-detail>
<!-- #enddocregion Template-1 -->
<!-- #docregion Template-2 -->
<template [ngIf]="currentHero != null">
<hero-detail [hero]="currentHero"></hero-detail>
</template>
<!-- #enddocregion Template-2 -->
<h3>NgFor expansion</h3>
<div class="box">
<!-- ngFor w/ hero-detail Component and a template "attribute" directive -->
<!-- #docregion Template-3 -->
<hero-detail template="ngFor #hero of heroes" [hero]="hero"></hero-detail>
<!-- #enddocregion Template-3 -->
</div>
<br>
<div class="box">
<!-- ngFor w/ hero-detail Component inside a template element -->
<!-- #docregion Template-4 -->
<template ngFor #hero [ngForOf]="heroes">
<hero-detail [hero]="hero"></hero-detail>
</template>
<!-- #enddocregion Template-4 -->
</div>
<!-- template local variable -->
<hr><h2>Template local variables</h2>
<!-- #docregion var-phone -->
<!-- phone refers to the input element; pass its `value` to an event handler -->
<input #phone placeholder="phone number">
<button (click)="callPhone(phone.value)">Call</button>
<!-- fax refers to the input element; pass its `value` to an event handler -->
<input var-fax placeholder="phone number">
<button (click)="callFax(fax.value)">Fax</button>
<!-- #enddocregion var-phone -->
<h4>Example Form</h4>
<!-- #docregion var-form -->
<!-- #docregion var-form-a -->
<form (ngSubmit)="onSubmit(theForm)" #theForm="ngForm">
<!-- #enddocregion var-form-a -->
<div class="form-group">
<label for="name">Name</label>
<input id="name" class="form-control" required ngControl="firstName"
[(ngModel)]="currentHero.firstName">
</div>
<!-- #docregion var-form-a -->
<button type="submit" [disabled]="!theForm.form.valid">Submit</button>
</form>
<!-- #enddocregion var-form-a -->
<!-- #enddocregion var-form -->
<br><br>
<!-- btn refers to the button element; show its disabled state -->
<button #btn disabled [textContent]="'disabled by attribute: ' + btn.disabled.toString()"></button>
<!-- inputs and output -->
<hr><h2>Inputs and Outputs</h2>
<!-- #docregion io-1 -->
<img [src]="iconUrl"/>
<button (click)="onSave()">Save</button>
<!-- #enddocregion io-1 -->
<!-- #docregion io-2 -->
<hero-detail [hero]="currentHero" (deleted)="onHeroDeleted($event)">
</hero-detail>
<!-- #enddocregion io-2 -->
<!-- <div myClick2 (myClick)="clicked2=$event">myClick2</div>
{{clicked2}}
PENDING: I don't see clicked2 defined anywhere in the TS example
-->
<!-- Pipes -->
<hr><h2>Pipes</h2>
<!-- #docregion pipes-1 -->
<!-- Force title to uppercase -->
<div>{{ title | uppercase }}</div>
<!-- #enddocregion pipes-1 -->
<!-- #docregion pipes-2 -->
<!-- Pipe chaining: force title to uppercase, then to lowercase -->
<div>{{ title | uppercase | lowercase }}</div>
<!-- #enddocregion pipes-2 -->
<!-- #docregion pipes-3 -->
<!-- pipe with configuration argument => "February 25, 1970" -->
<div>Birthdate: {{currentHero?.birthdate | date:'longDate'}}</div>
<!-- #enddocregion pipes-3 -->
<!-- #docregion pipes-json -->
<!--<div>{{currentHero | json}}</div>--> <!-- PENDING: uncomment? -->
<!-- Output:
{ "firstName": "Hercules", "lastName": "Son of Zeus",
"birthdate": "1970-02-25T08:00:00.000Z",
"url": "http://www.imdb.com/title/tt0065832/",
"rate": 325, "id": 1 }
-->
<!-- #enddocregion pipes-json -->
<div>Birthdate: {{(currentHero?.birthdate | date:'longDate') | uppercase}}</div>
<div>
<!-- pipe price to USD and display the $ symbol -->
<!--<label>Price: </label>{{product.price | currency:'USD':true}}--> <!-- PENDING: uncomment? -->
</div>
<!-- Null values and the Elvis operator -->
<hr><h2>Elvis</h2>
<div>
<!-- #docregion elvis-1 -->
The title is {{ title }}
<!-- #enddocregion elvis-1 -->
</div>
<div>
<!-- #docregion elvis-2 -->
The current hero's name is {{currentHero?.firstName}}
<!-- #enddocregion elvis-2 -->
</div>
<div>
<!-- #docregion elvis-3 -->
The current hero's name is {{currentHero.firstName}}
<!-- #enddocregion elvis-3 -->
</div>
<!--
The null hero's name is {{nullHero.firstName}}
See console log
TypeError: Cannot read property 'firstName' of null in [null]
-->
<!-- #docregion elvis-4 -->
<!--No hero, div not displayed, no error -->
<div *ngIf="nullHero != null">The null hero's name is {{nullHero.firstName}}</div>
<!-- #enddocregion elvis-4 -->
<div>
<!-- #docregion elvis-5 -->
The null hero's name is {{nullHero != null && nullHero.firstName != null}} <!-- PENDING: ??? -->
<!-- #enddocregion elvis-5 -->
</div>
<div>
<!-- #docregion elvis-6 -->
<!-- No hero, no problem! -->
The null hero's name is {{nullHero?.firstName}}
<!-- #enddocregion elvis-6 -->
</div>
<!-- Todo: discuss this in the Style binding section -->
<!-- enums in bindings -->
<hr><h2>Enums in binding</h2>
<p>The name of the Color.Red enum is {{color}}</p> <!-- PENDING: Color[Color.Red]?? -->
<p>The current color number is {{color}}</p>
<p><button [style.color]="color" (click)="colorToggle()">Enum Toggle</button> <!-- PENDING: color -> Color[color]? -->

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// #docregion
library template_syntax.hero;
class Hero {
static int _nextId = 1;
int id;
String firstName;
String lastName;
DateTime birthdate;
String url;
int rate = 100;
Hero(this.firstName, {this.lastName, this.birthdate, this.url, this.rate}) {
id = _nextId++;
}
static List<Hero> MockHeroes = [
new Hero('Hercules',
lastName: 'Son of Zeus',
birthdate: new DateTime(1970, 1, 25),
url: 'http://www.imdb.com/title/tt0065832/',
rate: 325),
new Hero('eenie', lastName: 'toe'),
new Hero('Meanie', lastName: 'Toe'),
new Hero('Miny', lastName: 'Toe'),
new Hero('Moe', lastName: 'Toe')
];
String get fullName => '$firstName $lastName';
}

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// #docregion
library template_syntax.hero_detail_component;
import 'package:angular2/angular2.dart';
import 'package:template_syntax/hero.dart';
var nextHeroDetailId = 1;
// #docregion input-output-2
@Component(
// #enddocregion input-output-2
selector: 'hero-detail',
// #docregion input-output-2
inputs: const ['hero'],
outputs: const ['deleted'],
// #enddocregion input-output-2
template: '''<div id="lh{{hero?.id}}">
{{hero?.fullName}}
<img src="{{heroImageUrl}}" style="height:24px">
<a href="#lh{{hero?.id}}" (click)="onDelete()">delete</a>
</div>'''
// #docregion input-output-2
)
// #enddocregion input-output-2
class HeroDetailComponent {
Hero hero;
// #docregion deleted
String heroImageUrl = 'assets/images/hero.png';
final EventEmitter deleted = new EventEmitter<Hero>();
onDelete() {
deleted.add(hero);
}
// #enddocregion deleted
}
@Component(
selector: 'big-hero-detail',
/*
inputs: ['hero'],
outputs: ['deleted'],
*/
template: '''<div style="border: 1px solid black; padding:3px">
<img src="{{heroImageUrl}}" style="float:left; margin-right:8px;">
<div><b>{{hero?.fullName}}</b></div>
<div>First: {{hero?.firstName}}</div>
<div>Last: {{hero?.lastName}}</div>
<div>Birthdate: {{hero?.birthdate | date:'longDate'}}</div>
<div>Web: <a href="{{hero?.url}}" target="_blank">{{hero?.url}}</a></div>
<div>Rate/hr: {{hero?.rate | currency:'EUR'}}</div>
<br clear="all">
<button (click)="onDelete()">Delete</button>
</div>''')
class BigHeroDetailComponent extends HeroDetailComponent {
// #docregion input-output-1
@Input() Hero hero;
@Output()
final EventEmitter deleted = new EventEmitter<Hero>();
// #enddocregion input-output-1
String heroImageUrl = 'assets/images/hero.png';
onDelete() {
deleted.add(hero);
}
}

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// #docregion
library template_syntax.my_click_directive;
import 'dart:html';
import 'package:angular2/angular2.dart';
@Directive(selector: '[myClick]')
class MyClickDirective {
// #docregion my-click-output-1
@Output()
final EventEmitter clicks = new EventEmitter<String>();
// #enddocregion my-click-output-1
MyClickDirective(ElementRef el) {
el.nativeElement.onClick.listen(this.clicks.add('Click!'));
}
}
// #docregion my-click-output-2
@Directive(
// #enddocregion my-click-output-2
selector: '[myClick2]',
// #docregion my-click-output-2
outputs: const ['clicks:myClick'])
// #enddocregion my-click-output-2
class MyClickDirective2 {
final EventEmitter clicks = new EventEmitter<String>();
MyClickDirective(ElementRef el) {
el.nativeElement.onClick.listen(this.clicks.add('Click!'));
}
}

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name: template_syntax
description: Template Syntax
version: 0.0.1
dependencies:
angular2: 2.0.0-beta.0
browser: ^0.10.0
transformers:
- angular2:
platform_directives:
- 'package:angular2/common.dart#COMMON_DIRECTIVES'
- 'package:angular2/common.dart#FORM_DIRECTIVES'
entry_points: web/main.dart

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<!--#docregion-->
<!DOCTYPE html>
<html>
<head>
<title>Template Syntax</title>
<link rel="stylesheet" href="style.css">
<script defer src="main.dart" type="application/dart"></script>
<script defer src="packages/browser/dart.js"></script>
</head>
<body>
<my-app>Loading...</my-app>
</body>
</html>

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// #docregion
import 'package:angular2/bootstrap.dart';
import 'package:template_syntax/app_component.dart';
main() {
bootstrap(AppComponent);
}

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fieldset {border-style:none}
img {height: 100px;}
.box {border: 1px solid black; padding:3px}
.child-div {margin-left: 1em; font-weight: normal}
.hidden {display: none}
.parent-div {margin-top: 1em; font-weight: bold}
.special {font-weight:bold; font-size: x-large}
.bad {color: red;}
.curly {font-family: "Brush Script MT"}
.toe {margin-left: 1em; font-style: italic;}
little-hero {color:blue; font-size: smaller; background-color: Turquoise }