JSFiddle - React, Tailwind, and code Playground

by TrueBlueAussie

HTML

<select class="selector">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
</select>
<br/>
Previous value:<div id="output"></div>

JavaScript

$(".selector").change(function() {
    // Get the previous value (if any)
    var prev = $(this).data("prev");
    // Store the new value for next time
    $(this).data("prev",$(this).val());
    
    $('#output').html(prev);
});