This is a lot easier to do starting in select2 v4. You can create a new Option
, and append it to the select
element directly. See my codepen or the example below:
$(document).ready(function() {
$("#state").select2({
tags: true
});
$("#btn-add-state").on("click", function(){
var newStateVal = $("#new-state").val();
// Set the value, creating a new option if necessary
if ($("#state").find("option[value=" + newStateVal + "]").length) {
$("#state").val(newStateVal).trigger("change");
} else {
// Create the DOM option that is pre-selected by default
var newState = new Option(newStateVal, newStateVal, true, true);
// Append it to the select
$("#state").append(newState).trigger('change');
}
});
});
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.1/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/twitter-bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.1/js/select2.min.js"></script>
<select id="state" class="js-example-basic-single" type="text" style="width:90%">
<option value="AL">Alabama</option>
<option value="WY">Wyoming</option>
</select>
<br>
<br>
<input id="new-state" type="text" />
<button type="button" id="btn-add-state">Set state value</button>
Hint: try entering existing values into the text box, like “AL” or “WY”. Then try adding some new values.