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AngularJS ng-app 指令


示例

让 body 元素成为 AngularJS 应用的根元素

<body ng-app="">

<p>我的第一个表达式:{{ 5 + 5 }}</p>

</body>
亲自试一试 »

定义和用法

ng-app 指令告诉 AngularJS 这是 AngularJS 应用的根元素。

所有 AngularJS 应用都必须有一个根元素。

您只能在 HTML 文档中使用一个 ng-app 指令。如果出现多个 ng-app 指令,则将使用第一个出现的指令。


语法

<元素 ng-app="模块名">
...
  ng-app 根元素内的内容可以包含 AngularJS 代码
...
</元素>

所有 HTML 元素都支持。


参数值

描述
模块名 可选。指定要与应用一起加载的模块的名称

示例

加载一个模块在应用中运行

<div ng-app="myApp" ng-controller="myCtrl">
    {{ firstName + " " + lastName }}
</div>

<script>
var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
    $scope.firstName = "John";
    $scope.lastName = "Doe";
});
</script>
亲自试一试 »

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