angular - 如何在 *ngFor 中设置动态 id？

Question

如何id在 Angular 2 中设置动态？

我努力了：

<div class = "CirclePoint" *ngFor="#c of circles" id = "{{ 'Location' + c.id }}"></div>

this.circles = [
        { x: 50 , y: 50 ,id : "oyut1" },
        { x: 100 , y: 100 ,id : "oyut3"  },
        { x: 150 , y: 150 ,id : "oyut2"  }
];

但它不起作用。

Answer 1

<div class = "CirclePoint" *ngFor="let c of circles" 
    [attr.id]="'Location' + c.id">
</div>

<div class = "CirclePoint" *ngFor="let c of circles" 
    attr.id="Location{{c.id}}">
</div>

对于id属性，这可能也有效（我自己还没有尝试过）

<div class = "CirclePoint" *ngFor="let c of circles" 
[id]="'Location' + c.id">
</div>

Answer 2

这也将起作用：

<div class = "CirclePoint" *ngFor="let c of circles">
   <div [id]="c.id"></div>
</div>

如果要添加前缀，请说“loc”；

<div class = "CirclePoint" *ngFor="let c of circles">
   <div [id]="'loc' + c.id"></div>
</div>

使用 [] 有助于动态添加值。

Answer 3

尝试这个：

 <div class = "CirclePoint" *ngFor="let c of circles">
     <div id="location_{{c.id}}">write something which you want like c.x </div>
 </div>`

希望这对你有用。我搜索了 StackOverflow 并找到了这个答案。

Answer 4

里面的组件标签而不是通常id="#c"使用的[id]="#c". 这也适用于动态类名。请参见下面的示例：

<div class = "CirlePoit" *ngFor="#c of circles" [id] = "#c"> </div>

Answer 5

INDEX 可用作动态 ID

<div class="test" *ngFor="let item of data; let i = index">
<div class="function_div" (click)="test(i);">Test Button </div>
    {{item}}
</div>