在 angularjs 的下拉列表中突出显示所选值

Highlight selected value in drop down in angularjs

我想在 angularjs 的下拉列表中显示所选的值。

<!DOCTYPE html>
<html>
  <script
 src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"> 
  </script>
<body>
  <div><select class="form-control" size="30" style=" 
        height:100px;width:100px" ng-model="value" ng-options="c.name for c 
        in customers track by c.id" ng-change="onChange">
       <option value="" selected hidden />
        </select></div>
</body>
</html>

通过上述方式,它不会突出显示所选 value.If 我将 ng-options 更改为 ng-options="c.id as c.name for c in customers track by c.id"。在我看到的值中 id 而不是 name.

您缺少 ng-selected 属性,请将属性 ng-selected="value" 添加到您的 select 元素。而且不需要option元素,track by语句也需要去掉

<select class="form-control" size="30" style=" height:100px;width:100px" 
       ng-model="value" ng-selected="value" 
       ng-options="c.id as c.name for c in customers">
</select>