JSFiddle - React, Tailwind, and code Playground

by Rob Crowther

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<a href="mailto:someone@somewhere.com?subject=test mail&body=Hello%20World">Mail Link</a>

<a href="https://www.jsfiddle.net/">Another one</a>

JavaScript

$(document).ready(function(){
    mailtoClicked = false;
    window.onbeforeunload = confirmExit;
    if (/chrom(e|ium)/.test(navigator.userAgent.toLowerCase())) {
    	$('a[href^=mailto]').click(function() {mailtoClicked = true;});
    }
});


function confirmExit() {
    if (!mailtoClicked) {
        return "Are you sure?";
    } else {
        mailtoClicked = false;
    }
}