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テキスト

AngularJS: API: ng/directive/ngValue

ngValue

  1. - directive in module ng

绑定给定的表达式到input[select]input[radio]的值上,这样当元素被选中时, 元素的ngModel 会被设为当前绑定的值。

ngValue 经常用于使用ng-repeat动态生成单选按钮列表,如下面所示。

指令信息

  • 这个指令执行优先级为0.

用法

  • 作为属性使用:
    <input
      [ng-value=""]>
    ...
    </input>

参数

Param 类型 详述
ngValue
(可选)
string

Angular表达式,绑定到input 元素的value 属性的值。

示例

index.html
<script>
   angular.module('valueExample', [])
     .controller('ExampleController', ['$scope', Function($scope) {
       $scope.names = ['pizza', 'unicorns', 'robots'];
       $scope.my = { favorite: 'unicorns' };
     }]);
</script>
 <form ng-controller="ExampleController">
   <h2>Which is your favorite?</h2>
     <label ng-repeat="name in names" for="{{name}}">
       {{name}}
       <input Type="radio"
              ng-model="my.favorite"
              ng-value="name"
              id="{{name}}"
              name="favorite">
     </label>
   <div>You chose {{my.favorite}}</div>
 </form>
protractor.js
var favorite = element(by.binding('my.favorite'));

it('should initialize to model', Function() {
  expect(favorite.getText()).toContain('unicorns');});
it('should bind the values to the inputs', Function() {
  element.all(by.model('my.favorite')).get(0).click();
  expect(favorite.getText()).toContain('pizza');});
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