[ngClass]与[class]绑定之间的区别

问题描述

以下代码段之间在Angular 2中有什么区别:

What is the difference in Angular 2 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，您不能按照此绑定样式构建自定义绑定变体.仅支持[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是正常的Angular指令，就像您可以自己构建它一样

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

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

ngClass功能更强大.它允许您绑定类字符串，字符串数组或类似示例中的对象.

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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