使用 AngularJS 选择的占位符

我无法通过 select 得到占位符的想法。下面的第一个条目仍然是空白。

<select class="form-control" ng-model="refData" required>
     <option ng-repeat="d in refData">
          {{d.value}}
     </option>
     <option value="" disabled hidden selected>View current values</option>
</select>

您可以使用嵌入来添加禁用和选择的额外选项。看如何为“选择”框制作占位符？ https://stackoverflow.com/questions/5805059/how-do-i-make-a-placeholder-for-a-select-box有关该通用解决方案的更多背景信息。这里是ng选择文档 https://docs.angularjs.org/api/ng/directive/select也供参考。

View

<div ng-controller="MyCtrl">
    <select name="mySelect" 
            id="mySelect"
            ng-options="option.name for option in refData track by option.id"
            ng-model="selectedOption">
         <option value="" disabled selected>View current values</option>
     </select>
</div>

AngularJS 应用程序

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl', function ($scope) {
    $scope.refData = [
      {id: '1', name: 'Option A'},
      {id: '2', name: 'Option B'},
      {id: '3', name: 'Option C'}
    ];

    $scope.selectedOption =  "";
});

JsFiddle 演示 http://jsfiddle.net/13y3dLkj/