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AngularJS ng-if 指令


示例

取消选中复选框以移除一个区域

保留 HTML: <input type="checkbox" ng-model="myVar" ng-init="myVar = true">
<div ng-if="myVar">
<h1>欢迎</h1>
<p>欢迎来到我的家。</p>
<hr>
</div>
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定义和用法

如果表达式的计算结果为 false,则 ng-if 指令会移除 HTML 元素。

如果 if 语句计算结果为 true,则会在 DOM 中添加元素的副本。

ng-if 指令不同于 ng-hide,后者隐藏元素的显示,而 ng-if 指令则完全从 DOM 中移除元素。


语法

<元素 ng-if="表达式"></元素>

所有 HTML 元素都支持。


参数值

描述
表达式 如果返回 false,则该表达式将完全移除元素。如果返回 true,则会插入元素的副本。

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