It depends on where you’re adding code.
If you are enqueuing a JS file then you need to set the $deps argument to array('acf-input') and you should also enqueue scripts on the acf/enqueue_scripts hook for any scripts you’re adding for ACF.
If you are putting code into the page the something like this usually works
(function($){
// your code here
}(jQuery)
More information here https://www.advancedcustomfields.com/resources/adding-custom-javascript-fields/
