AngularJs 指令元素子元素给出空

AngularJs Directive element children gives empty

本文关键字：元素 指令 AngularJs      更新时间：2023-09-26

我试图在选项上获取所选节点的内部HTML

<i class="before"></i>标记应从同一组的页面加载时接收来自所选选项或第一个选项的文本。但是只有硬编码的下拉列表在加载时获得值，但来自ngRepeat的下拉列表不会获得任何内容。

var myapp = angular.module('myapp', []);
myapp.controller('myCtrl', function($scope) {
  
    $scope.investments = [
      {"name": "AARP Operating Funds"},
      {"name": "Some Big Title"},
      {"name": "I hatez IE8"},
      {"name": "I Love FF DeveLoper Edition"},
      {"name": "Give Me Some Sunshine"}
    ];
    $scope.investment = $scope.investments[0].name;
  })
  .directive('dropdownSelectBox', function(){
    return function(scope, element, attrs) {
      //.filter('option[value="' +  element.find('select').val() + '"]').text()
      console.log(element.find('select').children());
      if (element.find('select').val() == '') {
        element.find('i').text($('select').eq(0).text());
      } else {
        element.find('i').text(element.find('select').children()[0].innerHTML);
      }
      element.find('select').bind('change', function(){                    
          element.find('i').text($(this).find(':selected').text());
      });
      
    };
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myapp" ng-controller="myCtrl">
  <span class="dropdown" dropdown-select-box="">
      
      <i class='before'></i>
      <select id="timePeriod">
          <option value="7" selected="selected">Last 7 Days </option>
          <option value="30">Last 30 Days </option>
          <option value="60">Last 60 Days </option>
          <option value="current">Current Year </option>
          <option value="prior">Prior Year</option>
      </select>
    </span>
    <span class="dropdown" dropdown-select-box="">
      
      <i class='before'></i>
      <select ng-options="opt.name as opt.name for opt in investments | orderBy:'name'" ng-model="investment"></select>
    </span>
</div>

最好使用 ng-model：

var myapp = angular.module('myapp', []);
myapp.controller('myCtrl', function($scope) {
  
    $scope.investments = [
      {"name": "AARP Operating Funds"},
      {"name": "Some Big Title"},
      {"name": "I hatez IE8"},
      {"name": "I Love FF DeveLoper Edition"},
      {"name": "Give Me Some Sunshine"}
    ];
    $scope.investment = $scope.investments[0];
    $scope.period = 'Last 7 Days';
  });
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myapp" ng-controller="myCtrl">
  <span class="dropdown" dropdown-select-box="">
      
      <i class='before'>{{period}} {{investment.name}}</i>
      <select id="timePeriod" ng-model="period">
          <option value="Last 7 Days" selected="selected">Last 7 Days </option>
          <option value="Last 30 Days">Last 30 Days </option>
          <option value="Last 60 Days">Last 60 Days </option>
          <option value="Current Year">Current Year </option>
          <option value="Prior Year">Prior Year</option>
      </select>
    </span>
    <span class="dropdown" dropdown-select-box="">
      
      <i class='before'></i>
      <select ng-options="opt.name for opt in investments | orderBy:'name'" ng-model="investment"></select>
    </span>
</div>

为了能够操作"元素"，我只是将jquery脚本链接移到angularjs之前。

演示：http://runnable.com/VK5RPx_xRDp8aqF_/angularjs-crossbrowser-select-dropdown-for-jquery-and-javascript

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