719 lines
21 KiB
HTML
719 lines
21 KiB
HTML
<!-- copied from: https://stackblitz.com/angular/ymdjlgmlavo -->
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<a id="toc"></a>
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<h1>Template Syntax</h1>
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<a href="#interpolation">Interpolation</a><br>
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<a href="#expression-context">Expression context</a><br>
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<a href="#statement-context">Statement context</a><br>
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<a href="#mental-model">Mental Model</a><br>
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<a href="#buttons">Buttons</a><br>
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<a href="#prop-vs-attrib">Properties vs. Attributes</a><br>
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<br>
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<a href="#property-binding">Property Binding</a><br>
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<div style="margin-left:8px">
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<a href="#attribute-binding">Attribute Binding</a><br>
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<a href="#class-binding">Class Binding</a><br>
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<a href="#style-binding">Style Binding</a><br>
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</div>
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<br>
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<a href="#event-binding">Event Binding</a><br>
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<a href="#two-way">Two-way Binding</a><br>
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<br>
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<div>Directives</div>
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<div style="margin-left:8px">
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<a href="#ngModel">NgModel (two-way) Binding</a><br>
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<a href="#ngClass">NgClass Binding</a><br>
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<a href="#ngStyle">NgStyle Binding</a><br>
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<a href="#ngIf">NgIf</a><br>
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<a href="#ngFor">NgFor</a><br>
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<div style="margin-left:8px">
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<a href="#ngFor-index">NgFor with index</a><br>
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<a href="#ngFor-trackBy">NgFor with trackBy</a><br>
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</div>
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<a href="#ngSwitch">NgSwitch</a><br>
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</div>
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<br>
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<a href="#ref-vars">Template reference variables</a><br>
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<a href="#inputs-and-outputs">Inputs and outputs</a><br>
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<a href="#pipes">Pipes</a><br>
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<a href="#safe-navigation-operator">Safe navigation operator <i>?.</i></a><br>
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<a href="#non-null-assertion-operator">Non-null assertion operator <i>!.</i></a><br>
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<a href="#enums">Enums</a><br>
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<!-- Interpolation and expressions -->
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<hr><h2 id="interpolation">Interpolation</h2>
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<p>My current hero is {{currentHero.name}}</p>
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<h3>
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{{title}}
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<img src="{{heroImageUrl}}" style="height:30px">
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</h3>
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<!-- "The sum of 1 + 1 is 2" -->
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<p>The sum of 1 + 1 is {{1 + 1}}</p>
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<!-- "The sum of 1 + 1 is not 4" -->
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<p>The sum of 1 + 1 is not {{1 + 1 + getVal()}}</p>
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<a class="to-toc" href="#toc">top</a>
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<hr><h2 id="expression-context">Expression context</h2>
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<p>Component expression context ({{title}}, [hidden]="isUnchanged")</p>
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<div class="context">
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{{title}}
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<span [hidden]="isUnchanged">changed</span>
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</div>
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<p>Template input variable expression context (let hero)</p>
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<!-- template hides the following; plenty of examples later -->
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<ng-template>
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<div *ngFor="let hero of heroes">{{hero.name}}</div>
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</ng-template>
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<p>Template reference variable expression context (#heroInput)</p>
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<div (keyup)="0" class="context">
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Type something:
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<input #heroInput> {{heroInput.value}}
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</div>
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<a class="to-toc" href="#toc">top</a>
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<hr><h2 id="statement-context">Statement context</h2>
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<p>Component statement context ( (click)="onSave() )
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<div class="context">
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<button (click)="deleteHero()">Delete hero</button>
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</div>
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<p>Template $event statement context</p>
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<div class="context">
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<button (click)="onSave($event)">Save</button>
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</div>
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<p>Template input variable statement context (let hero)</p>
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<!-- template hides the following; plenty of examples later -->
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<div class="context">
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<button *ngFor="let hero of heroes" (click)="deleteHero(hero)">{{hero.name}}</button>
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</div>
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<p>Template reference variable statement context (#heroForm)</p>
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<div class="context">
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<form #heroForm (ngSubmit)="onSubmit(heroForm)"> ... </form>
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</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- New Mental Model -->
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<hr><h2 id="mental-model">New Mental Model</h2>
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<!--<img src="http://www.wpclipart.com/cartoon/people/hero/hero_silhoutte_T.png">-->
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<!-- Public Domain terms of use: http://www.wpclipart.com/terms.html -->
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<div class="special">Mental Model</div>
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<img src="assets/images/hero.png">
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<button disabled>Save</button>
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<br><br>
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<div>
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<!-- Normal HTML -->
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<div class="special">Mental Model</div>
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<!-- Wow! A new element! -->
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<app-hero-detail></app-hero-detail>
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</div>
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<br><br>
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<div>
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<!-- Bind button disabled state to `isUnchanged` property -->
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<button [disabled]="isUnchanged">Save</button>
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</div>
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<br><br>
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<div>
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<img [src]="heroImageUrl">
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<app-hero-detail [hero]="currentHero"></app-hero-detail>
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<div [ngClass]="{'special': isSpecial}"></div>
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</div>
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<br><br>
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<button (click)="onSave()">Save</button>
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<app-hero-detail (deleteRequest)="deleteHero()"></app-hero-detail>
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<div (myClick)="clicked=$event" clickable>click me</div>
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{{clicked}}
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<br><br>
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<div>
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Hero Name:
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<input [(ngModel)]="name">
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{{name}}
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</div>
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<br><br>
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<button [attr.aria-label]="help">help</button>
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<br><br>
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<div [class.special]="isSpecial">Special</div>
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<br><br>
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<button [style.color]="isSpecial ? 'red' : 'green'">
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button</button>
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<a class="to-toc" href="#toc">top</a>
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<!-- property vs. attribute -->
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<hr><h2 id="prop-vs-attrib">Property vs. Attribute (img examples)</h2>
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<!-- examine the following <img> tag in the browser tools -->
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<img src="images/ng-logo.png"
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[src]="heroImageUrl">
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<br><br>
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<img [src]="iconUrl"/>
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<img bind-src="heroImageUrl"/>
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<img [attr.src]="villainImageUrl"/>
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<a class="to-toc" href="#toc">top</a>
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<!-- buttons -->
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<hr><h2 id="buttons">Buttons</h2>
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<button>Enabled (but does nothing)</button>
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<button disabled>Disabled</button>
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<button disabled=false>Still disabled</button>
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<br><br>
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<button disabled>disabled by attribute</button>
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<button [disabled]="isUnchanged">disabled by property binding</button>
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<br><br>
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<button bind-disabled="isUnchanged" on-click="onSave($event)">Disabled Cancel</button>
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<button [disabled]="!canSave" (click)="onSave($event)">Enabled Save</button>
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<a class="to-toc" href="#toc">top</a>
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<!-- property binding -->
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<hr><h2 id="property-binding">Property Binding</h2>
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<img [src]="heroImageUrl">
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<button [disabled]="isUnchanged">Cancel is disabled</button>
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<div [ngClass]="classes">[ngClass] binding to the classes property</div>
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<app-hero-detail [hero]="currentHero"></app-hero-detail>
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<img bind-src="heroImageUrl">
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<!-- ERROR: HeroDetailComponent.hero expects a
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Hero object, not the string "currentHero" -->
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<div *ngIf="false">
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<app-hero-detail hero="currentHero"></app-hero-detail>
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</div>
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<app-hero-detail prefix="You are my" [hero]="currentHero"></app-hero-detail>
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<p><img src="{{heroImageUrl}}"> is the <i>interpolated</i> image.</p>
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<p><img [src]="heroImageUrl"> is the <i>property bound</i> image.</p>
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<p><span>"{{title}}" is the <i>interpolated</i> title.</span></p>
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<p>"<span [innerHTML]="title"></span>" is the <i>property bound</i> title.</p>
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<!--
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Angular generates warnings for these two lines as it sanitizes them
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WARNING: sanitizing HTML stripped some content (see http://g.co/ng/security#xss).
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-->
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<p><span>"{{evilTitle}}" is the <i>interpolated</i> evil title.</span></p>
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<p>"<span [innerHTML]="evilTitle"></span>" is the <i>property bound</i> evil title.</p>
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<a class="to-toc" href="#toc">top</a>
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<!-- attribute binding -->
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<hr><h2 id="attribute-binding">Attribute Binding</h2>
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<!-- create and set a colspan attribute -->
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<table border=1>
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<!-- expression calculates colspan=2 -->
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<tr><td [attr.colspan]="1 + 1">One-Two</td></tr>
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<!-- ERROR: There is no `colspan` property to set!
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<tr><td colspan="{{1 + 1}}">Three-Four</td></tr>
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-->
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<tr><td>Five</td><td>Six</td></tr>
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</table>
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<br>
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<!-- create and set an aria attribute for assistive technology -->
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<button [attr.aria-label]="actionName">{{actionName}} with Aria</button>
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<br><br>
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<!-- The following effects are not discussed in the chapter -->
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<div>
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<!-- any use of [attr.disabled] creates the disabled attribute -->
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<button [attr.disabled]="isUnchanged">Disabled</button>
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<button [attr.disabled]="!isUnchanged">Disabled as well</button>
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<!-- we'd have to remove it with property binding -->
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<button disabled [disabled]="false">Enabled (but inert)</button>
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</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- class binding -->
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<hr><h2 id="class-binding">Class Binding</h2>
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<!-- standard class attribute setting -->
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<div class="bad curly special">Bad curly special</div>
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<!-- reset/override all class names with a binding -->
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<div class="bad curly special"
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[class]="badCurly">Bad curly</div>
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<!-- toggle the "special" class on/off with a property -->
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<div [class.special]="isSpecial">The class binding is special</div>
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<!-- binding to `class.special` trumps the class attribute -->
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<div class="special"
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[class.special]="!isSpecial">This one is not so special</div>
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<div bind-class.special="isSpecial">This class binding is special too</div>
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<a class="to-toc" href="#toc">top</a>
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<!--style binding -->
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<hr><h2 id="style-binding">Style Binding</h2>
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<button [style.color]="isSpecial ? 'red': 'green'">Red</button>
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<button [style.background-color]="canSave ? 'cyan': 'grey'" >Save</button>
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<button [style.font-size.em]="isSpecial ? 3 : 1" >Big</button>
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<button [style.font-size.%]="!isSpecial ? 150 : 50" >Small</button>
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<a class="to-toc" href="#toc">top</a>
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<!-- event binding -->
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<hr><h2 id="event-binding">Event Binding</h2>
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<button (click)="onSave()">Save</button>
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<button on-click="onSave()">On Save</button>
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<div>
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<!-- `myClick` is an event on the custom `ClickDirective` -->
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<div (myClick)="clickMessage=$event" clickable>click with myClick</div>
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{{clickMessage}}
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</div>
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<!-- binding to a nested component -->
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<app-hero-detail (deleteRequest)="deleteHero($event)" [hero]="currentHero"></app-hero-detail>
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<br>
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<app-big-hero-detail
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(deleteRequest)="deleteHero($event)"
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[hero]="currentHero">
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</app-big-hero-detail>
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<div class="parent-div" (click)="onClickMe($event)" clickable>Click me
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<div class="child-div">Click me too!</div>
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</div>
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<!-- Will save only once -->
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<div (click)="onSave()" clickable>
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<button (click)="onSave($event)">Save, no propagation</button>
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</div>
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<!-- Will save twice -->
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<div (click)="onSave()" clickable>
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<button (click)="onSave()">Save w/ propagation</button>
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</div>
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<a class="to-toc" href="#toc">top</a>
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<hr><h2 id="two-way">Two-way Binding</h2>
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<div id="two-way-1">
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<app-sizer [(size)]="fontSizePx"></app-sizer>
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<div [style.font-size.px]="fontSizePx">Resizable Text</div>
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<label>FontSize (px): <input [(ngModel)]="fontSizePx"></label>
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</div>
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<br>
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<div id="two-way-2">
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<h3>De-sugared two-way binding</h3>
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<app-sizer [size]="fontSizePx" (sizeChange)="fontSizePx=$event"></app-sizer>
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</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- Two way data binding unwound;
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passing the changed display value to the event handler via `$event` -->
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<hr><h2 id="ngModel">NgModel (two-way) Binding</h2>
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<h3>Result: {{currentHero.name}}</h3>
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<input [value]="currentHero.name"
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(input)="currentHero.name=$event.target.value" >
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without NgModel
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<br>
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<input [(ngModel)]="currentHero.name">
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[(ngModel)]
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<br>
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<input bindon-ngModel="currentHero.name">
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bindon-ngModel
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<br>
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<input
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[ngModel]="currentHero.name"
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(ngModelChange)="currentHero.name=$event">
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(ngModelChange)="...name=$event"
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<br>
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<input
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[ngModel]="currentHero.name"
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(ngModelChange)="setUppercaseName($event)">
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(ngModelChange)="setUppercaseName($event)"
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<a class="to-toc" href="#toc">top</a>
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<!-- NgClass binding -->
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<hr><h2 id="ngClass">NgClass Binding</h2>
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<p>currentClasses is {{currentClasses | json}}</p>
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<div [ngClass]="currentClasses">This div is initially saveable, unchanged, and special</div>
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<!-- not used in chapter -->
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<br>
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<label>saveable <input type="checkbox" [(ngModel)]="canSave"></label> |
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<label>modified: <input type="checkbox" [value]="!isUnchanged" (change)="isUnchanged=!isUnchanged"></label> |
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<label>special: <input type="checkbox" [(ngModel)]="isSpecial"></label>
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<button (click)="setCurrentClasses()">Refresh currentClasses</button>
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<br><br>
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<div [ngClass]="currentClasses">
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This div should be {{ canSave ? "": "not"}} saveable,
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{{ isUnchanged ? "unchanged" : "modified" }} and,
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{{ isSpecial ? "": "not"}} special after clicking "Refresh".</div>
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<br><br>
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<div [ngClass]="isSpecial ? 'special' : ''">This div is special</div>
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<div class="bad curly special">Bad curly special</div>
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<div [ngClass]="{'bad':false, 'curly':true, 'special':true}">Curly special</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- NgStyle binding -->
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<hr><h2 id="ngStyle">NgStyle Binding</h2>
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<div [style.font-size]="isSpecial ? 'x-large' : 'smaller'" >
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This div is x-large or smaller.
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</div>
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<h3>[ngStyle] binding to currentStyles - CSS property names</h3>
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<p>currentStyles is {{currentStyles | json}}</p>
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<div [ngStyle]="currentStyles">
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This div is initially italic, normal weight, and extra large (24px).
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</div>
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<!-- not used in chapter -->
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<br>
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<label>italic: <input type="checkbox" [(ngModel)]="canSave"></label> |
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<label>normal: <input type="checkbox" [(ngModel)]="isUnchanged"></label> |
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<label>xlarge: <input type="checkbox" [(ngModel)]="isSpecial"></label>
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<button (click)="setCurrentStyles()">Refresh currentStyles</button>
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<br><br>
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<div [ngStyle]="currentStyles">
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This div should be {{ canSave ? "italic": "plain"}},
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{{ isUnchanged ? "normal weight" : "bold" }} and,
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{{ isSpecial ? "extra large": "normal size"}} after clicking "Refresh".</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- NgIf binding -->
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<hr><h2 id="ngIf">NgIf Binding</h2>
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<app-hero-detail *ngIf="isActive"></app-hero-detail>
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<div *ngIf="currentHero">Hello, {{currentHero.name}}</div>
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<div *ngIf="nullHero">Hello, {{nullHero.name}}</div>
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<!-- NgIf binding with template (no *) -->
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<ng-template [ngIf]="currentHero">Add {{currentHero.name}} with template</ng-template>
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<!-- Does not show because isActive is false! -->
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<div>Hero Detail removed from DOM (via template) because isActive is false</div>
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<ng-template [ngIf]="isActive">
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<app-hero-detail></app-hero-detail>
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</ng-template>
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<!-- isSpecial is true -->
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<div [class.hidden]="!isSpecial">Show with class</div>
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<div [class.hidden]="isSpecial">Hide with class</div>
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<!-- HeroDetail is in the DOM but hidden -->
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<app-hero-detail [class.hidden]="isSpecial"></app-hero-detail>
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<div [style.display]="isSpecial ? 'block' : 'none'">Show with style</div>
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<div [style.display]="isSpecial ? 'none' : 'block'">Hide with style</div>
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<a class="to-toc" href="#toc">top</a>
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<!-- NgFor binding -->
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<hr><h2 id="ngFor">NgFor Binding</h2>
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<div class="box">
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<div *ngFor="let hero of heroes">{{hero.name}}</div>
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</div>
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<br>
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<div class="box">
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<!-- *ngFor w/ hero-detail Component -->
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<app-hero-detail *ngFor="let hero of heroes" [hero]="hero"></app-hero-detail>
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</div>
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<a class="to-toc" href="#toc">top</a>
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<h4 id="ngFor-index">*ngFor with index</h4>
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<p>with <i>semi-colon</i> separator</p>
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<div class="box">
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<div *ngFor="let hero of heroes; let i=index">{{i + 1}} - {{hero.name}}</div>
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</div>
|
|
|
|
<p>with <i>comma</i> separator</p>
|
|
<div class="box">
|
|
<!-- Ex: "1 - Hercules" -->
|
|
<div *ngFor="let hero of heroes, let i=index">{{i + 1}} - {{hero.name}}</div>
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<h4 id="ngFor-trackBy">*ngFor trackBy</h4>
|
|
<button (click)="resetHeroes()">Reset heroes</button>
|
|
<button (click)="changeIds()">Change ids</button>
|
|
<button (click)="clearTrackByCounts()">Clear counts</button>
|
|
|
|
<p><i>without</i> trackBy</p>
|
|
<div class="box">
|
|
<div #noTrackBy *ngFor="let hero of heroes">({{hero.id}}) {{hero.name}}</div>
|
|
|
|
<div id="noTrackByCnt" *ngIf="heroesNoTrackByCount" >
|
|
Hero DOM elements change #{{heroesNoTrackByCount}} without trackBy
|
|
</div>
|
|
</div>
|
|
|
|
<p>with trackBy</p>
|
|
<div class="box">
|
|
<div #withTrackBy *ngFor="let hero of heroes; trackBy: trackByHeroes">({{hero.id}}) {{hero.name}}</div>
|
|
|
|
<div id="withTrackByCnt" *ngIf="heroesWithTrackByCount">
|
|
Hero DOM elements change #{{heroesWithTrackByCount}} with trackBy
|
|
</div>
|
|
</div>
|
|
|
|
<br><br><br>
|
|
|
|
<p>with trackBy and <i>semi-colon</i> separator</p>
|
|
<div class="box">
|
|
<div *ngFor="let hero of heroes; trackBy: trackByHeroes">
|
|
({{hero.id}}) {{hero.name}}
|
|
</div>
|
|
</div>
|
|
|
|
<p>with trackBy and <i>comma</i> separator</p>
|
|
<div class="box">
|
|
<div *ngFor="let hero of heroes, trackBy: trackByHeroes">({{hero.id}}) {{hero.name}}</div>
|
|
</div>
|
|
|
|
<p>with trackBy and <i>space</i> separator</p>
|
|
<div class="box">
|
|
<div *ngFor="let hero of heroes trackBy: trackByHeroes">({{hero.id}}) {{hero.name}}</div>
|
|
</div>
|
|
|
|
<p>with <i>generic</i> trackById function</p>
|
|
<div class="box">
|
|
<div *ngFor="let hero of heroes, trackBy: trackById">({{hero.id}}) {{hero.name}}</div>
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- NgSwitch binding -->
|
|
<hr><h2 id="ngSwitch">NgSwitch Binding</h2>
|
|
|
|
<p>Pick your favorite hero</p>
|
|
<div>
|
|
<label *ngFor="let h of heroes">
|
|
<input type="radio" name="heroes" [(ngModel)]="currentHero" [value]="h">{{h.name}}
|
|
</label>
|
|
</div>
|
|
|
|
<div [ngSwitch]="currentHero.emotion">
|
|
<app-happy-hero *ngSwitchCase="'happy'" [hero]="currentHero"></app-happy-hero>
|
|
<app-sad-hero *ngSwitchCase="'sad'" [hero]="currentHero"></app-sad-hero>
|
|
<app-confused-hero *ngSwitchCase="'confused'" [hero]="currentHero"></app-confused-hero>
|
|
<div *ngSwitchCase="'confused'">Are you as confused as {{currentHero.name}}?</div>
|
|
<app-unknown-hero *ngSwitchDefault [hero]="currentHero"></app-unknown-hero>
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- template reference variable -->
|
|
<hr><h2 id="ref-vars">Template reference variables</h2>
|
|
|
|
<input #phone placeholder="phone number">
|
|
|
|
<!-- lots of other elements -->
|
|
|
|
<!-- phone refers to the input element; pass its `value` to an event handler -->
|
|
<button (click)="callPhone(phone.value)">Call</button>
|
|
|
|
<input ref-fax placeholder="fax number">
|
|
<button (click)="callFax(fax.value)">Fax</button>
|
|
|
|
<!-- btn refers to the button element; show its disabled state -->
|
|
<button #btn disabled [innerHTML]="'disabled by attribute: '+btn.disabled"></button>
|
|
|
|
<h4>Example Form</h4>
|
|
<app-hero-form [hero]="currentHero"></app-hero-form>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- inputs and output -->
|
|
<hr><h2 id="inputs-and-outputs">Inputs and Outputs</h2>
|
|
|
|
<img [src]="iconUrl"/>
|
|
<button (click)="onSave()">Save</button>
|
|
|
|
<app-hero-detail [hero]="currentHero" (deleteRequest)="deleteHero($event)">
|
|
</app-hero-detail>
|
|
|
|
<div (myClick)="clickMessage2=$event" clickable>myClick2</div>
|
|
{{clickMessage2}}
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- Pipes -->
|
|
<hr><h2 id="pipes">Pipes</h2>
|
|
|
|
<div>Title through uppercase pipe: {{title | uppercase}}</div>
|
|
|
|
<!-- Pipe chaining: convert title to uppercase, then to lowercase -->
|
|
<div>
|
|
Title through a pipe chain:
|
|
{{title | uppercase | lowercase}}
|
|
</div>
|
|
|
|
<!-- pipe with configuration argument => "February 25, 1970" -->
|
|
<div>Birthdate: {{currentHero?.birthdate | date:'longDate'}}</div>
|
|
|
|
<div>{{currentHero | json}}</div>
|
|
|
|
<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}}
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- Null values and the safe navigation operator -->
|
|
<hr><h2 id="safe-navigation-operator">Safe navigation operator <i>?.</i></h2>
|
|
|
|
<div>
|
|
The title is {{title}}
|
|
</div>
|
|
|
|
<div>
|
|
The current hero's name is {{currentHero?.name}}
|
|
</div>
|
|
|
|
<div>
|
|
The current hero's name is {{currentHero.name}}
|
|
</div>
|
|
|
|
|
|
<!--
|
|
The null hero's name is {{nullHero.name}}
|
|
|
|
See console log:
|
|
TypeError: Cannot read property 'name' of null in [null]
|
|
-->
|
|
|
|
<!--No hero, div not displayed, no error -->
|
|
<div *ngIf="nullHero">The null hero's name is {{nullHero.name}}</div>
|
|
|
|
<div>
|
|
The null hero's name is {{nullHero && nullHero.name}}
|
|
</div>
|
|
|
|
<div>
|
|
<!-- No hero, no problem! -->
|
|
The null hero's name is {{nullHero?.name}}
|
|
</div>
|
|
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- non-null assertion operator -->
|
|
<hr><h2 id="non-null-assertion-operator">Non-null assertion operator <i>!.</i></h2>
|
|
|
|
<div>
|
|
<!--No hero, no text -->
|
|
<div *ngIf="hero">
|
|
The hero's name is {{hero!.name}}
|
|
</div>
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- non-null assertion operator -->
|
|
<hr><h2 id="any-type-cast-function">$any type cast function <i>$any( )</i>.</h2>
|
|
|
|
<div>
|
|
<!-- Accessing an undeclared member -->
|
|
<div>
|
|
The hero's marker is {{$any(hero).marker}}
|
|
</div>
|
|
</div>
|
|
|
|
<div>
|
|
<!-- Accessing an undeclared member -->
|
|
<div>
|
|
Undeclared members is {{$any(this).member}}
|
|
</div>
|
|
</div>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
<!-- TODO: discuss this in the Style binding section -->
|
|
<!-- enums in bindings -->
|
|
<hr><h2 id="enums">Enums in binding</h2>
|
|
|
|
<p>
|
|
The name of the Color.Red enum is {{Color[Color.Red]}}.<br>
|
|
The current color is {{Color[color]}} and its number is {{color}}.<br>
|
|
<button [style.color]="Color[color]" (click)="colorToggle()">Enum Toggle</button>
|
|
</p>
|
|
|
|
<a class="to-toc" href="#toc">top</a>
|
|
|
|
|
|
<!--
|
|
Copyright 2017-2018 Google Inc. All Rights Reserved.
|
|
Use of this source code is governed by an MIT-style license that
|
|
can be found in the LICENSE file at http://angular.io/license
|
|
-->
|
|
|
|
<div id="heroForm">
|
|
<form (ngSubmit)="onSubmit(heroForm)" #heroForm="ngForm">
|
|
<div class="form-group">
|
|
<label for="name">Name
|
|
<input class="form-control" name="name" required [(ngModel)]="hero.name">
|
|
</label>
|
|
</div>
|
|
<button type="submit" [disabled]="!heroForm.form.valid">Submit</button>
|
|
</form>
|
|
<div [hidden]="!heroForm.form.valid">
|
|
{{submitMessage}}
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<!--
|
|
Copyright 2017-2018 Google Inc. All Rights Reserved.
|
|
Use of this source code is governed by an MIT-style license that
|
|
can be found in the LICENSE file at http://angular.io/license
|
|
-->
|