Angular [ngClass] vs [class [英] Angular [ngClass] vs [class

问题描述

以下片段之间的Angular有何不同：

What is the difference in Angular between the following snippets:

<div [class.extra-sparkle]="isDelightful">
<div [ngClass]="{'extra-sparkle': isDelightful}">

推荐答案

这是特殊的Angular绑定语法

This is special Angular binding syntax

<div [class.extra-sparkle]="isDelightful">

这是Angular编译器的一部分，您无法在此绑定样式后构建自定义绑定变体。唯一支持的是 [class.xxx] =...， [style.xxx] =...和 [attr.xxx] =...

This is part of the Angular compiler and you can't build a custom binding variant following this binding style. The only supported are [class.xxx]="...", [style.xxx]="...", and [attr.xxx]="..."

ngClass 是一个正常的Angular指令，就像你可以自己构建一样

ngClass is a normal Angular directive like you can build it yourself

<div [ngClass]="{'extra-sparkle': isDelightful}">

ngClass 更强大。它允许您绑定类的字符串，字符串数组或对象中的对象。

ngClass is more powerful. It allows you to bind a string of classes, an array of strings, or an object like in your example.

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