esedic
8/11/2015 - 3:52 PM

Detect IE with Javascript

Detect IE with Javascript

// vanilla javascript
var browser = {
    isIe: function () {
        return navigator.appVersion.indexOf("MSIE") != -1;
    },
    navigator: navigator.appVersion,
    getVersion: function() {
        var version = 999; // we assume a sane browser
        if (navigator.appVersion.indexOf("MSIE") != -1)
            // bah, IE again, lets downgrade version number
            version = parseFloat(navigator.appVersion.split("MSIE")[1]);
        return version;
    }
};

if (browser.isIe() && browser.getVersion() <= 9) {

    console.log("You are currently using Internet Explorer" + browser.getVersion() + " or are viewing the site in Compatibility View, please upgrade for a better user experience.")
}

// jquery
(function($) {

    var matched, browser;

    // Use of jQuery.browser is frowned upon.
    // More details: http://api.jquery.com/jQuery.browser
    // jQuery.uaMatch maintained for back-compat
    jQuery.uaMatch = function( ua ) {
        ua = ua.toLowerCase();

        var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
            /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
            /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
            /(msie) ([\w.]+)/.exec( ua ) ||
            ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
            [];

        return {
            browser: match[ 1 ] || "",
            version: match[ 2 ] || "0"
        };
    };
    // Don't clobber any existing jQuery.browser in case it's different
    if ( !jQuery.browser ) {
        matched = jQuery.uaMatch( navigator.userAgent );
        browser = {};

        if ( matched.browser ) {
            browser[ matched.browser ] = true;
            browser.version = matched.version;
        }

    // Chrome is Webkit, but Webkit is also Safari.
        if ( browser.chrome ) {
            browser.webkit = true;
        } else if ( browser.webkit ) {
            browser.safari = true;
        }
        jQuery.browser = browser;
    }
})(jQuery);