Kevin Kloet Kevin Kloet - 7 months ago 56
Javascript Question

jQuery on change/input not working when updating value via JS

i have noticed that the event for

is not firing when the change is done by the javascript itself.

why is this the case?

is there a way to still fire the event?

here is an example:

$('#firstId').on('change input paste', function(){
console.log("this is the input event being fired");

$('#randomButton').on('click', function(){
$('#firstId').val(Math.floor(Math.random()*2147483647 )+1);
console.log("randomButton being fired");

<script src=""></script>
<span for="firstId">number: </span>
<input type="number" id="firstId"/>
<button id="randomButton">Get a random number</button><br>


That is because all the events attached above via handler are triggered by user action and not via code. you can use .trigger() or .change() here to trigger the event:

$('#firstId').val(Math.floor(Math.random()*2147483647 )+1).change();


$('#firstId').val(Math.floor(Math.random()*2147483647 )+1).trigger('change');