Slick.prototype.getLeft = function()

in assets/js/slick.js [1091:1196]
91 lines of code
31 McCabe index (conditional complexity)

    Slick.prototype.getLeft = function(slideIndex) {

        var _ = this,
            targetLeft,
            verticalHeight,
            verticalOffset = 0,
            targetSlide,
            coef;

        _.slideOffset = 0;
        verticalHeight = _.$slides.first().outerHeight(true);

        if (_.options.infinite === true) {
            if (_.slideCount > _.options.slidesToShow) {
                _.slideOffset = (_.slideWidth * _.options.slidesToShow) * -1;
                coef = -1

                if (_.options.vertical === true && _.options.centerMode === true) {
                    if (_.options.slidesToShow === 2) {
                        coef = -1.5;
                    } else if (_.options.slidesToShow === 1) {
                        coef = -2
                    }
                }
                verticalOffset = (verticalHeight * _.options.slidesToShow) * coef;
            }
            if (_.slideCount % _.options.slidesToScroll !== 0) {
                if (slideIndex + _.options.slidesToScroll > _.slideCount && _.slideCount > _.options.slidesToShow) {
                    if (slideIndex > _.slideCount) {
                        _.slideOffset = ((_.options.slidesToShow - (slideIndex - _.slideCount)) * _.slideWidth) * -1;
                        verticalOffset = ((_.options.slidesToShow - (slideIndex - _.slideCount)) * verticalHeight) * -1;
                    } else {
                        _.slideOffset = ((_.slideCount % _.options.slidesToScroll) * _.slideWidth) * -1;
                        verticalOffset = ((_.slideCount % _.options.slidesToScroll) * verticalHeight) * -1;
                    }
                }
            }
        } else {
            if (slideIndex + _.options.slidesToShow > _.slideCount) {
                _.slideOffset = ((slideIndex + _.options.slidesToShow) - _.slideCount) * _.slideWidth;
                verticalOffset = ((slideIndex + _.options.slidesToShow) - _.slideCount) * verticalHeight;
            }
        }

        if (_.slideCount <= _.options.slidesToShow) {
            _.slideOffset = 0;
            verticalOffset = 0;
        }

        if (_.options.centerMode === true && _.slideCount <= _.options.slidesToShow) {
            _.slideOffset = ((_.slideWidth * Math.floor(_.options.slidesToShow)) / 2) - ((_.slideWidth * _.slideCount) / 2);
        } else if (_.options.centerMode === true && _.options.infinite === true) {
            _.slideOffset += _.slideWidth * Math.floor(_.options.slidesToShow / 2) - _.slideWidth;
        } else if (_.options.centerMode === true) {
            _.slideOffset = 0;
            _.slideOffset += _.slideWidth * Math.floor(_.options.slidesToShow / 2);
        }

        if (_.options.vertical === false) {
            targetLeft = ((slideIndex * _.slideWidth) * -1) + _.slideOffset;
        } else {
            targetLeft = ((slideIndex * verticalHeight) * -1) + verticalOffset;
        }

        if (_.options.variableWidth === true) {

            if (_.slideCount <= _.options.slidesToShow || _.options.infinite === false) {
                targetSlide = _.$slideTrack.children('.slick-slide').eq(slideIndex);
            } else {
                targetSlide = _.$slideTrack.children('.slick-slide').eq(slideIndex + _.options.slidesToShow);
            }

            if (_.options.rtl === true) {
                if (targetSlide[0]) {
                    targetLeft = (_.$slideTrack.width() - targetSlide[0].offsetLeft - targetSlide.width()) * -1;
                } else {
                    targetLeft =  0;
                }
            } else {
                targetLeft = targetSlide[0] ? targetSlide[0].offsetLeft * -1 : 0;
            }

            if (_.options.centerMode === true) {
                if (_.slideCount <= _.options.slidesToShow || _.options.infinite === false) {
                    targetSlide = _.$slideTrack.children('.slick-slide').eq(slideIndex);
                } else {
                    targetSlide = _.$slideTrack.children('.slick-slide').eq(slideIndex + _.options.slidesToShow + 1);
                }

                if (_.options.rtl === true) {
                    if (targetSlide[0]) {
                        targetLeft = (_.$slideTrack.width() - targetSlide[0].offsetLeft - targetSlide.width()) * -1;
                    } else {
                        targetLeft =  0;
                    }
                } else {
                    targetLeft = targetSlide[0] ? targetSlide[0].offsetLeft * -1 : 0;
                }

                targetLeft += (_.$list.width() - targetSlide.outerWidth()) / 2;
            }
        }

        return targetLeft;

    };