如何将 ElementRef 添加到本地 dom?

How to Add ElementRef into local dom?

我想创建一个布局组件来排列项目组,例如:

<garden-bed>
  <div #veg (click)="pluck()">carrot</div>
  <div #veg (click)="pluck()">cabbage</div>
  <div #veg (click)="pluck()">turnip</div>
</garden-bed>

到目前为止的组件看起来像

@Component({
  selector: 'app-garden-bed',
  templateUrl: './garden-bed.component.html',
})
export class GardenBed  {

  @ContentChildren('veg') vegs: QueryList<ElementRef>;

  constructor() { }


  ngAfterViewInit() {
    console.log('this.vegs=' + JSON.stringify(this.vegs));
  }

}

但我不知道如何将它们种植在模板中(花园-bed.component.html):

  <div *ngFor="let veg of vegs">
     <ng-content/ng-template  *something="veg"></ng-template>
     but this doesn't work.
     veg should appear here and all its binding should work!

  </div>

非常感谢任何帮助!

为避免更改检测出现问题,您应该仅使用一次 toArrayQueryList 中获取 templateRefs:

  templates: TemplateRef[];

  ngAfterViewInit() {
    console.log('this.vegs=' + JSON.stringify(this.vegs));
    this.templates = this.vegs.toArray();
  }

然后用ngTemplateOutlet戳模板

  <div *ngFor="let veg of templates">
     <ng-container *ngTemplateOutlet="veg"></ng-container>
     but this doesn't work.
     veg should appear here and all its binding should work!

  </div>

ngTemplateOutlet 还允许传递可以在模板中绑定的上下文数据

另见

不要被 <ng-template [ngTemplateOutlet]="myTemplate" 搞糊涂了,它只是我上面显示的语法的替代语法