如何在加载的页面上创建多个select-2

Question

我正在创建一个表单，允许我从数据库中添加项目，我可以添加我需要的项目数量。我也可以选择我要选择的项目的类型。

问题是，当我给按钮添加另一个项目，这个负载，但同时消除了其他选择的选择-2的功能。这是我的密码；

我使用jQuery和select-2和引导。

我尝试在页面加载后加载，但这不起作用；我将其设置为.onloaddocument

$('.select-dinamic').select2({ width: '100%' });
$("#button_new_equip").click(function(event) {
var select_buton='<div class="from-group  mt-1"><div class="row "><div class="col-3"><select class="select-dinamic col" name="" id="instrument0"><option value="qwqwqw">wewewewe</option></select></div><div class="col-8"><select class="select-dinamic col" name="" id="Tip"><option value="qwqwqw">wewewewe</option></select></div></div></div><br>'

  $("#Insp_instruments").append(select_buton)
  $('.select-dinamic').select2({ width: '100%' });
  /* Act on the event */
});

html
<div class="card container  ">
<div class="" id="Insp_instruments">
  <div class="from-group">
    <button type="button"id="button_new_equip" class="btn btn-primary "name="button"><i class="fas fa-plus"></i></button>
  </div>
<br>
        </div>
</div>
</div>

如果我尝试在表单中添加新的select2

前面的选择丢失了select2属性。

Answer 1

对于运行时创建的所有新下拉列表，您都使用了静态id属性，即id="instrument0"和id="Tip"。

所以

• 要么从html中删除id属性，它就能工作了。
• 或者通过使用$('.select-dinamic').length添加计数器来使它们唯一

第二个选项更好地适应，您必须将两个select的ids更改为

• id="instrument_' + $('.select-dinamic').length + '"
• id="Tip_' + $('.select-dinamic').length + '"

见下面的工作演示

​

$("#button_new_equip").on('click', function(event) {
  var select_buton = '<div class="from-group  mt-1"><div class="row "><div class="col-3"><select class="select-dinamic col" name="" id="instrument_' + $('.select-dinamic').length + '"><option value="qwqwqw">wewewewe</option></select></div><div class="col-8"><select class="select-dinamic col" name="" id="Tip_' + $('.select-dinamic').length + '"><option value="qwqwqw">wewewewe</option></select></div></div></div><br>';

  $("#Insp_instruments").append(select_buton);
  $('.select-dinamic').select2({
    width: '100%'
  });

  /* Act on the event */
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.9/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.9/js/select2.min.js"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<script src="https://kit.fontawesome.com/c08b275b91.js"></script>
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="card container">
  <div class="" id="Insp_instruments">


    <div class="from-group">
      <button type="button" id="button_new_equip" class="btn btn-primary " name="button"><i class="fas fa-plus"></i></button>
    </div>

    <br>


  </div>

</div>

​