SimpleTaskSystem.Web/metronic/assets/frontend/layout/scripts/layout.js

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var Layout = function () {

     // IE mode
    var isRTL = false;
    var isIE8 = false;
    var isIE9 = false;
    var isIE10 = false;
    var isIE11 = false;

    var responsive = true;

    var responsiveHandlers = [];

    var handleInit = function() {

        if ($('body').css('direction') === 'rtl') {
            isRTL = true;
        }

        isIE8 = !! navigator.userAgent.match(/MSIE 8.0/);
        isIE9 = !! navigator.userAgent.match(/MSIE 9.0/);
        isIE10 = !! navigator.userAgent.match(/MSIE 10.0/);
        isIE11 = !! navigator.userAgent.match(/MSIE 11.0/);
        
        if (isIE10) {
            jQuery('html').addClass('ie10'); // detect IE10 version
        }
        if (isIE11) {
            jQuery('html').addClass('ie11'); // detect IE11 version
        }
    }

    // runs callback functions set by App.addResponsiveHandler().
    var runResponsiveHandlers = function () {
        // reinitialize other subscribed elements
        for (var i in responsiveHandlers) {
            var each = responsiveHandlers[i];
            each.call();
        }
    }

    // handle the layout reinitialization on window resize
    var handleResponsiveOnResize = function () {
        var resize;
        if (isIE8) {
            var currheight;
            $(window).resize(function () {
                if (currheight == document.documentElement.clientHeight) {
                    return; //quite event since only body resized not window.
                }
                if (resize) {
                    clearTimeout(resize);
                }
                resize = setTimeout(function () {
                    runResponsiveHandlers();
                }, 50); // wait 50ms until window resize finishes.                
                currheight = document.documentElement.clientHeight; // store last body client height
            });
        } else {
            $(window).resize(function () {