ngFor - 无法绑定到“testid"，因为它不是“input"的已知属性.如何用字符串连接id? [英] ngFor - Can't bind to 'testid' since it isn't a known property of 'input'. how to concat id with string?

问题描述

我正在尝试使用我的 ID 添加 index 值.但得到一个错误:

I am trying to add the index value with my ids. but getting an error as:

Can't bind to 'testid' since it isn't a known property of 'input'.

这是我的模板:

<td *ngFor="let col of columns; let i = index"  [ngClass]="col.class" data-testid="form-create-td-{{i}}">

我的代码有什么问题?有人帮帮我吗?

what is wrong with my code? any one help me?

推荐答案

我认为您将需要属性绑定.所以请尝试替换下面的 testid 数据属性.

I think you will need property binding. So please try to replace below testid data property.

<td ... [attr.data-testid]="'form-create-td-' + i">

对于带有字符串的连接 id 属性，您做对了.

For concatenation id property with string, you are doing right thing.

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