物化选择不起作用的附加选项

Question

我为我的项目使用了物化css，当我想用​​ajax在matrialize select中附加选项时遇到问题。我已经按照这个答案如何在实现CSS框架中动态修改<select>。但不起作用。

在我的HTML中，我使用物化模式来渲染物化表单。这是我的代码：

                   <div class="input-field col s12">                            
                        <select id="select_1" name="select_1">
                            <option value="1">option 1</option>
                            <option value="2">option 2Barat</option>     
                        </select>
                      <label for="select_1">Select 1</label>
                    </div>

                     <div class="input-field col s12">                          
                        <select id="select_2"  name="select_2">
                            <option value="0" disabled="disabled">Choose option</option>
                        </select>
                      <label for="select_2">Select 2</label>
                    </div>

我的js

<script type="text/javascript">
    $(document).ready(function(){
        function get_selected(){
            var base_url = '<?php echo base_url() ?>';
            var data = $('#select_1').val();
            $.ajax({
                url: ""+base_url+"admin/get_data/",
                dataType: 'json',
                type: "POST",
                data:{'data':data},
                beforeSend: function() {

                },                  
                success: function (data) {
                    var text = '';
                    var $selectDropdown = $("#select_1").empty().html(' ');

                    $.each(data, function(i, val){                      
                        $selectDropdown.append($("<option></option>").attr("value",val.id).text(val.name));

                    })

                    $selectDropdown.trigger('contentChanged');
                    $('select').on('contentChanged', function() {
                      // re-initialize (update)
                      $(this).material_select();
                    });
                },
                error: function (xhr, status, err) {
                    // console.log(xhr);
                    // console.log(status);
                    // console.log(err);
                },
            });
        }


        $(document).on('change','#select_1', function(){
            get_selected();         
        })
    })
</script>

注意：我使用jQuery 3.3.1并实现版本0.100.2。谢谢您的帮助，对不起我的英语:)

Answer 1

对于 2019 年后来到这里的任何人，请注意，API 已更改并且 material_Select() 不再有效。用，

    $('#my_Element').append(<Array of options>)
    $('#my_Element').formSelect()

Answer 2

 $(document).ready(function() {
    $('select').material_select();
 });
 
 $(document).on('change','#select_1', function(){
     get_selected();         
})


function get_selected(){
     var data=[{id:1,name:"ABC"},{id:2,name:"XYZ"},{id:3,name:"PQR"}];
     
     var Options="";
    $.each(data, function(i, val){ 
      Options=Options+"<option value='"+val.id+"'>"+val.name+"</option>";
  });
  $('#select_2').empty();
  $('#select_2').append(Options);
  $("#select_2").material_select()
} 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/css/materialize.min.css">


  <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js"></script>
    
<div class="row">    
<div class="input-field col s12">                            
<select id="select_1" name="select_1">
<option value="1">option 1</option>
<option value="2">option 2Barat</option>     
</select>
<label for="select_1">Select 1</label>
</div>
                    
<div class="input-field col s12">                          
<select id="select_2"  name="select_2">
<option value="0" disabled="disabled">Choose option</option>
</select>
<label for="select_2">Select 2</label>
</div>
</div>