ie/edge detection
detect if a browser is ie11 or edge
by dgrebb
HTML
<body>
<div class="thing">hi</div>
</body>
JavaScript
agent = navigator.userAgent;
document.body.innerHTML = agent;
if ( agent.indexOf('Trident') > -1 ) {
document.body.innerHTML += 'ie 11 or edge';
} else if ( agent.indexOf('Edge') > -1 ) {
document.body.innerHTML += 'edge';
} else {
document.body.innerHTML += 'not ie or edge';
}