Detectar versiones de IE/Edge

Script Javascript para reconocer Internet Explorer hasta 12+ alias Edge.

detectando…

n/a

var uA = window.navigator.userAgent,
onlyIEorEdge = /msie\s|trident\/|edge\//i.test(uA) && !!( document.uniqueID || window.MSInputMethodContext),
checkVersion = (onlyIEorEdge && +(/(edge\/|rv:|msie\s)([\d.]+)/i.exec(uA)[2])) || NaN;