Question

我正在尝试在select2中设置我预定义的选择选项用ajax 但是当我使用ajax并点击select2时，它会删除之前我所拥有的html选项，任何想法如何让它保留选项，而不是删除它们直到我输入一些不相关的char？

我相信目前尚不清楚所以我对这两种情况进行了调整，以便您更好地理解

HTML

<select id="e1" style="width:300px">
        <option value="AL">Alabama</option>
        <option value="Am">Amalapuram</option>
        <option value="An">Anakapalli</option>
        <option value="Ak">Akkayapalem</option>
        <option value="WY">Wyoming</option>
    </select>


<select id="e2" style="width:300px">
        <option value="AL">Alabama</option>
        <option value="Am">Amalapuram</option>
        <option value="An">Anakapalli</option>
        <option value="Ak">Akkayapalem</option>
        <option value="WY">Wyoming</option>
    </select>

js

$("#e1").select2({ajax: {
    url: "https://api.github.com/search/repositories",
    dataType: 'json',
    delay: 250,
    data: function (params) {
      return {
        q: params.term, // search term
        page: params.page
      };
    },
    processResults: function (data, page) {
      // parse the results into the format expected by Select2.
      // since we are using custom formatting functions we do not need to
      // alter the remote JSON data
      return {
        results: data.items
      };
    },
    cache: true
  }});

$("#e2").select2();

fiddle example of select2 ajax and none ajax

Answer 1

在您正在处理用户发送的搜索查询的服务器端脚本中，返回应显示为默认值的前5个元素，即使查询为空。

 $query=$_REQUEST['q'];
 if (!empty($query)) {
     //populate the results if the user is typed something in
 } else {
   $results=array();
   $results[0]['text']=Alabama;
   $results[0]['id']="idofalabama";
   // and so on, for the number of results you want to display when the user didn't input anything in the search box
 }
 return json_encode($results);

select2在使用ajax时删除默认选项

1 个答案: