angular - 管道转换后在 ngFor 中获取数组的长度

Question

我有以下模板:

<div *ngFor="let item of myArray | customPipe1 | customPipe2; let l = length">
  Here is the length of my ngFor : {{l}}
</div>

不幸的是，ngFor 中不存在长度。我怎样才能解决这个问题，让我的 ngFor 中有可用的长度？

Answer 1

另一种解决方案如下

<div *ngFor="let item of myArray | customPipe1 | customPipe2; let l = count">
  Here is the length of my ngFor : {{l}}
</div>

Plunker Example

另见

• https://github.com/angular/angular/blob/master/packages/common/src/directives/ng_for_of.ts#L15-L17