30 lines
		
	
	
		
			598 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
			
		
		
	
	
			30 lines
		
	
	
		
			598 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
// #docplaster
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// #docregion
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import { Directive, ElementRef, HostListener, Input } from '@angular/core';
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@Directive({
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  selector: '[myHighlight]'
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})
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export class HighlightDirective {
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  @Input('myHighlight') highlightColor: string;
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  private el: HTMLElement;
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  constructor(el: ElementRef) {
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    this.el = el.nativeElement;
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  }
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  @HostListener('mouseenter') onMouseEnter() {
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    this.highlight(this.highlightColor || 'cyan');
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  }
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  @HostListener('mouseleave') onMouseLeave() {
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    this.highlight(null);
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  }
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  private highlight(color: string) {
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    this.el.style.backgroundColor = color;
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  }
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}
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