JSFiddle - React, Tailwind, and code Playground

by Mahadevan Sivasubramanian

HTML

<a id='help' onclick=change() title="please click on Links">Links</a>

JavaScript

window.onbeforeunload = function(evt) {
            var message = 'Are you sure you want to leave?';
            if (typeof evt == 'undefined') {
                evt = window.event;
            }       
            if (evt) {
                evt.returnValue = message;
            }
            return message;
        }