有一些类似的线程,但我找不到适合我的需求的答案。因此,在angular2中应严格避免直接访问DOM。我只是想知道最佳实践是什么。
我想要实现的是根据当前宽度调整元素大小。
workitemresize.component.ts
import { Directive, ElementRef, HostListener, Renderer, Input } from '@angular/core';
@Directive({
selector: '[workItemResize]'
})
export class WorkItemResizeDirective implements ngAfterViewInit {
private el: HTMLElement;
private renderer: Renderer;
constructor(el: ElementRef, public renderer: Renderer)
{
this.el = el.nativeElement;
this.renderer = renderer;
}
@HostListener('window:resize', ['$event.target'])
onResize()
{
this.resizeWorks();
}
ngAfterViewInit() {
this.resizeWorks();
}
private resizeWorks(): void {
this.renderer.setElementStyle(this.el, 'height', this.el.width); // <-- doesn't work I kow that this.el.width doesn't exist but just for demonstration purpose
this.renderer.setElementStyle(this.el, 'height', '500'); // <-- works
}
}
projects.template.html
<div class="posts row">
<div class="work-item col-xs-12 col-sm-6 col-no-padding" workItemResize *ngFor="let post of posts">
<!-- show some fancy image -->
<div class="img" [ngStyle]="{'background-image':'url('+post.better_featured_image.source_url+')'}"></div>
</div>
</div>