How to Set Selected Values in jQuery Select2 for Different Versions?

Setting Selected Value in jQuery Select2

Select2 Version V4 and Above

In Select2 version 4 and above, you can directly append pre-selected options to your select element:

<code class="html"><select id="myMultipleSelect2" multiple="" name="myMultipleSelect2[]">
    <option value="TheID" selected="selected">The text</option>                                                                   
</select>
</code>

Using jQuery:

<code class="js">var $newOption = $("<option selected='selected'></option>").val("TheID").text("The text")

$("#myMultipleSelect2").append($newOption).trigger('change');</code>

Select2 Version Below V4

1. HTML:

   <code class="html"><input name="mySelect2" type="hidden" id="mySelect2"></code>

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2. Create Select2 Instance:

   <code class="js">$("#mySelect2").select2({
      placeholder: "My Select 2",
      multiple: false,
      minimumInputLength: 1,
      ajax: {...},
      ...
   });</code>

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3. Set Selected Value:

   <code class="js">$("#mySelect2").select2('data', { id:"elementID", text: "Hello!" });</code>

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Non-AJAX Select2

<code class="html"><select name="mySelect2" id="mySelect2">
  <option value="0">One</option>
  <option value="1">Two</option>
  <option value="2">Three</option>
</select></code>

<code class="js">$('[name=mySelect2]').val("0"); // Select "One"
$("#mySelect2").select2("val", "0"); // Equivalent</code>

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