Slick.prototype.checkResponsive = function()

in assets/js/slick.js [595:681]
78 lines of code
25 McCabe index (conditional complexity)

    Slick.prototype.checkResponsive = function(initial, forceUpdate) {

        var _ = this,
            breakpoint, targetBreakpoint, respondToWidth, triggerBreakpoint = false;
        var sliderWidth = _.$slider.width();
        var windowWidth = window.innerWidth || $(window).width();

        if (_.respondTo === 'window') {
            respondToWidth = windowWidth;
        } else if (_.respondTo === 'slider') {
            respondToWidth = sliderWidth;
        } else if (_.respondTo === 'min') {
            respondToWidth = Math.min(windowWidth, sliderWidth);
        }

        if ( _.options.responsive &&
            _.options.responsive.length &&
            _.options.responsive !== null) {

            targetBreakpoint = null;

            for (breakpoint in _.breakpoints) {
                if (_.breakpoints.hasOwnProperty(breakpoint)) {
                    if (_.originalSettings.mobileFirst === false) {
                        if (respondToWidth < _.breakpoints[breakpoint]) {
                            targetBreakpoint = _.breakpoints[breakpoint];
                        }
                    } else {
                        if (respondToWidth > _.breakpoints[breakpoint]) {
                            targetBreakpoint = _.breakpoints[breakpoint];
                        }
                    }
                }
            }

            if (targetBreakpoint !== null) {
                if (_.activeBreakpoint !== null) {
                    if (targetBreakpoint !== _.activeBreakpoint || forceUpdate) {
                        _.activeBreakpoint =
                            targetBreakpoint;
                        if (_.breakpointSettings[targetBreakpoint] === 'unslick') {
                            _.unslick(targetBreakpoint);
                        } else {
                            _.options = $.extend({}, _.originalSettings,
                                _.breakpointSettings[
                                    targetBreakpoint]);
                            if (initial === true) {
                                _.currentSlide = _.options.initialSlide;
                            }
                            _.refresh(initial);
                        }
                        triggerBreakpoint = targetBreakpoint;
                    }
                } else {
                    _.activeBreakpoint = targetBreakpoint;
                    if (_.breakpointSettings[targetBreakpoint] === 'unslick') {
                        _.unslick(targetBreakpoint);
                    } else {
                        _.options = $.extend({}, _.originalSettings,
                            _.breakpointSettings[
                                targetBreakpoint]);
                        if (initial === true) {
                            _.currentSlide = _.options.initialSlide;
                        }
                        _.refresh(initial);
                    }
                    triggerBreakpoint = targetBreakpoint;
                }
            } else {
                if (_.activeBreakpoint !== null) {
                    _.activeBreakpoint = null;
                    _.options = _.originalSettings;
                    if (initial === true) {
                        _.currentSlide = _.options.initialSlide;
                    }
                    _.refresh(initial);
                    triggerBreakpoint = targetBreakpoint;
                }
            }

            // only trigger breakpoints during an actual break. not on initialize.
            if( !initial && triggerBreakpoint !== false ) {
                _.$slider.trigger('breakpoint', [_, triggerBreakpoint]);
            }
        }

    };