占位符在select2中不起作用 [英] Placeholder not working in select2

问题描述

我正在使用Select2选择框.

占位符未显示在select2中.它始终显示在select2中选择的第一个选项.它会自动选择我要显示占位符而不是它的第一个选项.

Placeholder is not showing in select2. It is always show the first option selected in the select2. It's automatically select first option i want to show the placeholder instead of it.

脚本:

<script type="text/javascript">
    $(document).ready(function () {
       var data = $('#test_skill').select2({
            placeholder: "Please select an skill",
            allowClear: true
       });
    });

// I have also tried this: This is also not working
    $('#test_skill').select2({
      placeholder: {
        id: '-1', // the value of the option
        text: 'Please select an skill'
      } 
    });
</script>

HTML:

<select class="skills_select2" required name="test_skill" id="test_skill">          
    <option value="1">TEST1</option>
    <option value="2">TEST2</option>
    <option value="3">TEST3</option>            
</select>

推荐答案

只需将<option></option>置于select中即可.

Just put <option></option> in select on first place:

$(document).ready(function() {
  $selectElement = $('#test_skill').select2({
    placeholder: "Please select an skill",
    allowClear: true
  });
});

.skills_select2 {
  width: 120px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.css" />
<select class="skills_select2" required name="test_skill" id="test_skill">   
    <option></option>
    <option value="1">TEST1</option>
    <option value="2">TEST2</option>
    <option value="3">TEST3</option>            
</select>

这篇关于占位符在select2中不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！