typescript Angular 2悬停类指令

Posted 2021-05-21

import { Directive, Input, HostListener, Renderer, ElementRef } from '@angular/core';


@Directive({ selector: '[hoverClass]' })
export class HoverClassDirective {
  @Input()
  hoverClass: string;

  constructor(
    public elementRef: ElementRef,
    private renderer: Renderer
  ) { }

  @HostListener('mouseover') mouseover() {
    this.renderer.setElementClass(this.elementRef.nativeElement, this.hoverClass, true);
  }

  @HostListener('mouseout') mouseout() {
    this.renderer.setElementClass(this.elementRef.nativeElement, this.hoverClass, false);
  }
}