克隆select2选项

Question

I am trying to clone a select2 with it's options but it doesn't seem to work.

I tried to destroy before recreating, to remove the span before recreating, but nothing works. Here is the basic code.

HTML :

<div class="container">
  <div class="row" id="row_0">
    <div class="col-md-12">
      <form id="form_0" onsubmit="return false;">
        <select class="select2" name="test1" id="test1_0">
          <option value="o_test">o_test1_1</option>
          <option value="o_test">o_test1_2</option>
          <option value="o_test">o_test1_3</option>
        </select>
        <select class="select2" name="test2" id="test2_0">
          <option value="o_test">o_test2_1</option>
          <option value="o_test">o_test2_2</option>
          <option value="o_test">o_test2_3</option>
        </select>

        <button onclick="addRow()">clone</button>
      </form>
    </div>
  </div>
</div>

Javascript :

function addRow() {
  var div = $('div[id^="row"]:last');
  var num = parseInt( div.prop("id").match(/\d+/g), 10 ) +1;
  var clone = div.clone().prop('id', 'row_'+num );

  div.after( clone );
}

$(".select2").select2();

Here is a fiddle containing my problem : https://jsfiddle.net/L5mn63g7/25/

So any idea what could the problem be? To be able to clone select2 WITH it's options.

Answer 1

Remove span tags before cloning and rebind select2 to the cloned dropdowns.

Hope it will help you.

 function addRow() { var div = $('div[id^="row"]:last'); var num = parseInt( div.prop("id").match(/\\d+/g), 10 ) +1; var clone = div.clone().prop('id', 'row_'+num ); clone.find('[id]').each(function(){var $this = $(this); $this.prop('id', $this.prop('id').split('_')[0] + '_' + num);}); clone.find("span").remove(); clone.find(".select2").select2(); clone.find(".select2-container").css("width","300px") div.append( clone ); } $(".select2").select2(); 

 select { width: 300px; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script> <div class="container"> <div class="row" id="row_0"> <div class="col-md-12"> <form id="form_0" onsubmit="return false;"> <select class="select2" name="test1" id="test1_0"> <option value="o_test">o_test1_1</option> <option value="o_test">o_test1_2</option> <option value="o_test">o_test1_3</option> </select> <select class="select2" name="test2" id="test2_0"> <option value="o_test">o_test2_1</option> <option value="o_test">o_test2_2</option> <option value="o_test">o_test2_3</option> </select> <button onclick="addRow()">clone</button> </form> </div> </div> </div> 

Answer 2

You have to destroy select2 first before cloning and change the name of selector for select2 to something other. Here is working solution

 function addRow() { $('.items').select2("destroy"); var div = $('div[id^="row"]:last'); var num = parseInt(div.prop("id").match(/\\d+/g), 10) + 1; var $clone = div.clone().prop('id', 'row_' + num); $clone.find('[id]').each(function() { var $this = $(this); $this.prop('id', $this.prop('id').split('_')[0] + '_' + num); }); div.after($clone); $('.items').select2(); } $(".items").select2(); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.js"></script> <div class="container"> <div class="row" id="row_0"> <div class="col-md-12"> <form id="form_0" onsubmit="return false;"> <select class="items" name="test1" id="test1_0"> <option value="o_test">o_test1_1</option> <option value="o_test">o_test1_2</option> <option value="o_test">o_test1_3</option> </select> <select class="items" name="test2" id="test2_0"> <option value="o_test">o_test2_1</option> <option value="o_test">o_test2_2</option> <option value="o_test">o_test2_3</option> </select> <button onclick="addRow()">clone</button> </form> </div> </div> </div>