Check whether your browser is a f**king specified version of IE.
$ npm i fuck-ie
var fuckIE = require('fuck-ie')
// If your browser is IE6, the returned value will be true.
var isIE_6 = fuckIE(6)
// If your browser is IE6 or IE7 or IE8, the returned value will be true.
var isIE_6_7_8 = fuckIE(6, 7, 8)
// If your browser is any version of IE, the returned value will be true.
var isAnyVersionOfIE = fuckIE()