JSFiddle - React, Tailwind, and code Playground

JavaScript

var ie_version = (function() {
    var undef,
        v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');

    while (
        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
        all[0]
    );

    return v > 4 ? v : undef;
}());

/*@cc_on
if (typeof(ie_version) == 'undefined') {
    ie_version = parseInt(@_jscript_version);
}
@*/

alert(ie_version)