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  • import { Directive, HostBinding, HostListener } from '@angular/core';
    
    @Directive({
      selector: '[tohValidator]'
    })
    export class ValidatorDirective {
      @HostBinding('attr.role') role = 'button';
      @HostListener('mouseenter') onMouseEnter() {
        // do work
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">interface</span> <span class="token class-name">Directive</span> <span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">const</span> Directive<span class="token operator">:</span> DirectiveDecorator <span class="token keyword">import</span> Directive</code><div class="typing-tooltip-markup">Directive decorator and metadata. Type of the Directive metadata.<br><br><em>@Annotation</em><br><br><em>@publicApi</em><br><br><em>@publicApi</em></div></pre>
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  • import { Directive, HostBinding, HostListener } from '@angular/core';
    
    @Directive({
      selector: '[tohValidator]'
    })
    export class ValidatorDirective {
      @HostBinding('attr.role') role = 'button';
      @HostListener('mouseenter') onMouseEnter() {
        // do work
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">interface</span> <span class="token class-name">Directive</span> <span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">const</span> Directive<span class="token operator">:</span> DirectiveDecorator <span class="token keyword">import</span> Directive</code><div class="typing-tooltip-markup">Directive decorator and metadata. Type of the Directive metadata.<br><br><em>@Annotation</em><br><br><em>@publicApi</em><br><br><em>@publicApi</em></div></pre>
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  • /* avoid */
    
    @Component({
      selector: 'toh-hero-button',
      template: `<button></button>`,
      inputs: [
        'label'
      ],
      outputs: [
        'heroChange'
      ]
    })
    export class HeroButtonComponent {
      heroChange = new EventEmitter<any>();
      label: string;
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • export class HeroComponent {
      @Output() savedTheDay = new EventEmitter<boolean>();
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">class</span> <span class="token class-name">HeroComponent</span></code></pre>
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  • /* avoid */
    
    @Component({
      selector: 'toh-hero',
      template: `...`
    })
    export class HeroComponent {
      @Output() onSavedTheDay = new EventEmitter<boolean>();
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • export class SizerComponent {
    
      @Input()  size!: number | string;
      @Output() sizeChange = new EventEmitter<number>();
    
      dec() { this.resize(-1); }
      inc() { this.resize(+1); }
    
      resize(delta: number) {
        this.size = Math.min(40, Math.max(8, +this.size + delta));
        this.sizeChange.emit(this.size);
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">class</span> <span class="token class-name">SizerComponent</span></code></pre>
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  • @Component({
      selector: 'app-zippy',
      template: `
        <div class="zippy">
          <div (click)="toggle()">Toggle</div>
          <div [hidden]="!visible">
            <ng-content></ng-content>
          </div>
        </div>
      `,
    })
    export class ZippyComponent {
      visible = true;
      @Output() open = new EventEmitter<any>();
      @Output() close = new EventEmitter<any>();
    
      toggle() {
        this.visible = !this.visible;
        if (this.visible) {
          this.open.emit(null);
        } else {
          this.close.emit(null);
        }
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • import { Directive } from '@angular/core';
    
    @Directive({
      selector: '[tohValidator2]',
      host: {
        '[attr.role]': 'role',
        '(mouseenter)': 'onMouseEnter()'
      }
    })
    export class Validator2Directive {
      role = 'button';
      onMouseEnter() {
        // do work
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">interface</span> <span class="token class-name">Directive</span> <span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">const</span> Directive<span class="token operator">:</span> DirectiveDecorator <span class="token keyword">import</span> Directive</code><div class="typing-tooltip-markup">Directive decorator and metadata. Type of the Directive metadata.<br><br><em>@Annotation</em><br><br><em>@publicApi</em><br><br><em>@publicApi</em></div></pre>
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  • @Directive({
      selector: '[tohValidate]'
    })
    export class ValidateDirective {}
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • @Directive({
      selector: '[tohHighlight]'
    })
    export class HighlightDirective {
      @HostListener('mouseover') onMouseEnter() {
        // do highlight work
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • import { Directive } from '@angular/core';
    
    @Directive({
      selector: '[appItem]'
    })
    export class ItemDirective {
    // code goes here
      constructor() { }
    
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">interface</span> <span class="token class-name">Directive</span> <span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">const</span> Directive<span class="token operator">:</span> DirectiveDecorator <span class="token keyword">import</span> Directive</code><div class="typing-tooltip-markup">Directive decorator and metadata. Type of the Directive metadata.<br><br><em>@Annotation</em><br><br><em>@publicApi</em><br><br><em>@publicApi</em></div></pre>
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  • /* avoid */
    
    @Directive({
      selector: '[validate]'
    })
    export class ValidateDirective {}
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • @Input() childItem = '';
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • export class ProductAlertsComponent implements OnInit {
    
      @Input() product!: Product;
      constructor() { }
    
      ngOnInit() {
      }
    
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token keyword">class</span> <span class="token class-name">ProductAlertsComponent</span></code></pre>
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  • @Input() items: Item[] = [];
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • @Directive({
      selector: '[appForbiddenName]',
      providers: [{provide: NG_VALIDATORS, useExisting: ForbiddenValidatorDirective, multi: true}]
    })
    export class ForbiddenValidatorDirective implements Validator {
      @Input('appForbiddenName') forbiddenName = '';
    
      validate(control: AbstractControl): ValidationErrors | null {
        return this.forbiddenName ? forbiddenNameValidator(new RegExp(this.forbiddenName, 'i'))(control)
                                  : null;
      }
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token builtin">any</span></code></pre>
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  • import { Component, Input } from '@angular/core';
    
    /**
     * Example progressbar component.
     */
    @Component({
      selector: 'app-example-progressbar',
      template: `<div class="bar" [style.width.%]="value"></div>`,
      styleUrls: ['./progress-bar.component.css'],
      host: {
        // Sets the role for this component to "progressbar"
        role: 'progressbar',
    
        // Sets the minimum and maximum values for the progressbar role.
        'aria-valuemin': '0',
        'aria-valuemax': '100',
    
        // Binding that updates the current value of the progressbar.
        '[attr.aria-valuenow]': 'value',
      }
    })
    export class ExampleProgressbarComponent  {
      /** Current value of the progressbar. */
      @Input() value = 0;
    }
    <pre class="typing-tooltip"><code data-language="javascript" class="language-javascript"><span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">interface</span> <span class="token class-name">Component</span> <span class="token punctuation">(</span>alias<span class="token punctuation">)</span> <span class="token keyword">const</span> Component<span class="token operator">:</span> ComponentDecorator <span class="token keyword">import</span> Component</code><div class="typing-tooltip-markup">Supplies configuration metadata for an Angular component. Component decorator and metadata.<br><br><em>@publicApi</em><br><br><em>@Annotation</em><br><br><em>@publicApi</em></div></pre>
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