如何使用 Angular 2+ 绑定到数据属性? [英] How to bind to a data attribute using Angular 2+?

问题描述

我使用的数据表主要是用我在网上找到的 css 创建的.在其中一列中有一个 css 数据属性data-title"，它被分配了一个字符串.

I am using a data table created mostly with css that I found online. In one of the columns there is a css data attribute "data-title" which is assigned a string.

<td data-title="someString">

当我输入一个字符串时，列内的样式按预期工作.当我尝试绑定到对象字符串时，绑定不会像我预期的那样工作.我试过了

When I enter a string, the styling inside the column works as expected. When I try to bind to an objects string, the binding doesn't work like I would expect. I tried

<td data-title="object.someString">

它只显示文字object.someString"，我试过

which just displays literal 'object.someString' and I tried

<td data-title="{{object.someString}}">

什么都不显示(空白).知道为什么我的绑定在这里不起作用吗?

which displays nothing (blank). Any idea why my binding isn't working here?

CSS:

.responsive-table tbody td[data-title]:before {
  content: attr(data-title);
  float: left;
  font-size: .9em;
  color: #565248;
}

@media (min-width: 48em) {
  .responsive-table tbody td[data-title]:before {
    content: none;
  }
}

推荐答案

Angular 2 不会使用更简单的 {{ }} 语法绑定到 data- 属性，因为它尝试将它们映射到 DOM 属性，并且没有 data-title 的 DOM 属性(而且 Angular2 似乎还不够智能，无法使用 dataset 还 -除非我遗漏了什么).

Angular 2 doesn't bind to data- attributes using the simpler {{ }} syntax because it tries to map them to DOM properties, and there isn't a DOM property for data-title (and it seems Angular2 isn't smart enough to use dataset yet - unless I'm missing something).

因此要绑定到 data- 属性，您需要使用 attr.data-title={{}} 或 [attr.data-...]="" 语法.请参阅此 QA:Angular 2 数据属性

So to bind to data- attributes you need to use the attr.data-title={{}} or [attr.data-...]="" syntax. See this QA: Angular 2 data attributes

<td [attr.data-title]="object.someString">

或者:

<td attr.data-title="{{object.someString}}">

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