如何获取ngFor数组的DOM元素？

Question

How can I get the actual element of a ngFor, so that I can work with it in the Component.ts

Example:

//.html
<div *ngFor="let element of elements">
      <md-card>{{element}}
           <button (click)="delete()">Delete</button>
     </md-card>
</div>

//.ts
   public delete() {
        mydata.delete(this.element)    //how to delete the actual element?
    }

Answer 1

Maintaining Index of Element

You can maintain the index in loop and pass to the method.

//.html
<div *ngFor="let element of elements; let i = index;">
      <md-card>{{element}}
           <button (click)="delete(i)">Delete</button>
     </md-card>
</div>

//.ts
   public delete(index:number) {
      // if your elements is an array, you can use splice.
     elements.splice(index, 1);
    }

Passing The Full Element

If your data structure has a way to delete based on an element being passed to it. Arrays don't have a delete method that takes an object, you have to splice. You can just pass the object like this

//.html
<div *ngFor="let element of elements">
      <md-card>{{element}}
           <button (click)="delete(element)">Delete</button>
     </md-card>
</div>

//.ts
   public delete(element:ElementType) {
        mydata.delete(element)    //how to delete the actual element?
    }