JSFiddle - React, Tailwind, and code Playground

HTML

<select size="8" name="choices" multiple="" id="my_choices">
    <option value="First Choice">First Choice</option>
    <option value="Second Choice">Second Choice</option>
</select>

JavaScript

var change_func = function() {
    var res = $('#my_choices').val();
    alert("change " + res);
}
    
var blur_func = function() {
    var res = $('#my_choices').val();
    alert("blur " + res);
}

$('#my_choices').change(change_func);
$('#my_choices').blur(blur_func);