javascript - 使用 AngularJS 选择的占位符

Question

我无法通过选择获得占位符。在下面，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>

Answer 1

您可以使用嵌入来添加禁用和选中的额外选项。参见 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。这是 ngSelect documentation也供引用。

查看

<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

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 Demo