JSFiddle - React, Tailwind, and code Playground

HTML

<form action="http://example.com">
    <input type="file" id="file" onchange="$('form').submit();" />
    <input id="submit" type="submit" name="submit" value="Upload"/>
</form>

JavaScript

$(document).ready(function(){
    $("form").on('submit',function(){
        alert("It works");
    });
});