JSFiddle - React, Tailwind, and code Playground

HTML

<form id="profileform" name="profileform">
    <input type="text" id="firstname">
    <input type="button" id="testbutton" value="Test">
</form>

JavaScript

$('#testbutton').bind('click',function(){

    try{
    alert($('#profileform').checkValidity());
    }
    catch(err){'err='+err};
    
});