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slick.js
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slick.js
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/*
_ _ _ _
___| (_) ___| | __ (_)___
/ __| | |/ __| |/ / | / __|
\__ \ | | (__| < _ | \__ \
|___/_|_|\___|_|\_(_)/ |___/
|__/
Version: 1.8.0
Author: Ken Wheeler
Website: http://kenwheeler.github.io
Docs: http://kenwheeler.github.io/slick
Repo: http://github.com/kenwheeler/slick
Issues: http://github.com/kenwheeler/slick/issues
*/
/* global window, document, define, jQuery, setInterval, clearInterval */
;(function(factory) {
'use strict';
if (typeof define === 'function' && define.amd) {
define(['jquery'], factory);
} else if (typeof exports !== 'undefined') {
module.exports = factory(require('jquery'));
} else {
factory(jQuery);
}
}(function($) {
'use strict';
var Slick = window.Slick || {};
Slick = (function() {
var instanceUid = 0;
function Slick(element, settings) {
var _ = this, dataSettings;
_.defaults = {
accessibility: true,
adaptiveHeight: false,
appendArrows: $(element),
appendDots: $(element),
arrows: true,
asNavFor: null,
prevArrow: '<button class="slick-prev" aria-label="Previous" type="button">Previous</button>',
nextArrow: '<button class="slick-next" aria-label="Next" type="button">Next</button>',
autoplay: false,
autoplaySpeed: 3000,
centerMode: false,
centerPadding: '50px',
cssEase: 'ease',
customPaging: function(slider, i) {
return $('<button type="button" />').text(i + 1);
},
dots: false,
dotsClass: 'slick-dots',
draggable: true,
easing: 'linear',
edgeFriction: 0.35,
fade: false,
focusOnSelect: false,
focusOnChange: false,
infinite: true,
initialSlide: 0,
lazyLoad: 'ondemand',
mobileFirst: false,
pauseOnHover: true,
pauseOnFocus: true,
pauseOnDotsHover: false,
respondTo: 'window',
responsive: null,
rows: 1,
rtl: false,
slide: '',
slidesPerRow: 1,
slidesToShow: 1,
slidesToScroll: 1,
speed: 500,
swipe: true,
swipeToSlide: false,
touchMove: true,
touchThreshold: 5,
useCSS: true,
useTransform: true,
variableWidth: false,
vertical: false,
verticalSwiping: false,
waitForAnimate: true,
zIndex: 1000
};
_.initials = {
animating: false,
dragging: false,
autoPlayTimer: null,
currentDirection: 0,
currentLeft: null,
currentSlide: 0,
direction: 1,
$dots: null,
listWidth: null,
listHeight: null,
loadIndex: 0,
$nextArrow: null,
$prevArrow: null,
scrolling: false,
slideCount: null,
slideWidth: null,
$slideTrack: null,
$slides: null,
sliding: false,
slideOffset: 0,
swipeLeft: null,
swiping: false,
$list: null,
touchObject: {},
transformsEnabled: false,
unslicked: false
};
$.extend(_, _.initials);
_.activeBreakpoint = null;
_.animType = null;
_.animProp = null;
_.breakpoints = [];
_.breakpointSettings = [];
_.cssTransitions = false;
_.focussed = false;
_.interrupted = false;
_.hidden = 'hidden';
_.paused = true;
_.positionProp = null;
_.respondTo = null;
_.rowCount = 1;
_.shouldClick = true;
_.$slider = $(element);
_.$slidesCache = null;
_.transformType = null;
_.transitionType = null;
_.visibilityChange = 'visibilitychange';
_.windowWidth = 0;
_.windowTimer = null;
dataSettings = $(element).data('slick') || {};
_.options = $.extend({}, _.defaults, settings, dataSettings);
_.currentSlide = _.options.initialSlide;
_.originalSettings = _.options;
if (typeof document.mozHidden !== 'undefined') {
_.hidden = 'mozHidden';
_.visibilityChange = 'mozvisibilitychange';
} else if (typeof document.webkitHidden !== 'undefined') {
_.hidden = 'webkitHidden';
_.visibilityChange = 'webkitvisibilitychange';
}
_.autoPlay = $.proxy(_.autoPlay, _);
_.autoPlayClear = $.proxy(_.autoPlayClear, _);
_.autoPlayIterator = $.proxy(_.autoPlayIterator, _);
_.changeSlide = $.proxy(_.changeSlide, _);
_.clickHandler = $.proxy(_.clickHandler, _);
_.selectHandler = $.proxy(_.selectHandler, _);
_.setPosition = $.proxy(_.setPosition, _);
_.swipeHandler = $.proxy(_.swipeHandler, _);
_.dragHandler = $.proxy(_.dragHandler, _);
_.keyHandler = $.proxy(_.keyHandler, _);
_.instanceUid = instanceUid++;
// A simple way to check for HTML strings
// Strict HTML recognition (must start with <)
// Extracted from jQuery v1.11 source
_.htmlExpr = /^(?:\s*(<[\w\W]+>)[^>]*)$/;
_.registerBreakpoints();
_.init(true);
}
return Slick;
}());
Slick.prototype.activateADA = function() {
var _ = this;
_.$slideTrack.find('.slick-active').attr({
'aria-hidden': 'false'
}).find('a, input, button, select').attr({
'tabindex': '0'
});
};
Slick.prototype.addSlide = Slick.prototype.slickAdd = function(markup, index, addBefore) {
var _ = this;
if (typeof(index) === 'boolean') {
addBefore = index;
index = null;
} else if (index < 0 || (index >= _.slideCount)) {
return false;
}
_.unload();
if (typeof(index) === 'number') {
if (index === 0 && _.$slides.length === 0) {
$(markup).appendTo(_.$slideTrack);
} else if (addBefore) {
$(markup).insertBefore(_.$slides.eq(index));
} else {
$(markup).insertAfter(_.$slides.eq(index));
}
} else {
if (addBefore === true) {
$(markup).prependTo(_.$slideTrack);
} else {
$(markup).appendTo(_.$slideTrack);
}
}
_.$slides = _.$slideTrack.children(this.options.slide);
_.$slideTrack.children(this.options.slide).detach();
_.$slideTrack.append(_.$slides);
_.$slides.each(function(index, element) {
$(element).attr('data-slick-index', index);
});
_.$slidesCache = _.$slides;
_.reinit();
};
Slick.prototype.animateHeight = function() {
var _ = this;
if (_.options.slidesToShow === 1 && _.options.adaptiveHeight === true && _.options.vertical === false) {
var targetHeight = _.$slides.eq(_.currentSlide).outerHeight(true);
_.$list.animate({
height: targetHeight
}, _.options.speed);
}
};
Slick.prototype.animateSlide = function(targetLeft, callback) {
var animProps = {},
_ = this;
_.animateHeight();
if (_.options.rtl === true && _.options.vertical === false) {
targetLeft = -targetLeft;
}
if (_.transformsEnabled === false) {
if (_.options.vertical === false) {
_.$slideTrack.animate({
left: targetLeft
}, _.options.speed, _.options.easing, callback);
} else {
_.$slideTrack.animate({
top: targetLeft
}, _.options.speed, _.options.easing, callback);
}
} else {
if (_.cssTransitions === false) {
if (_.options.rtl === true) {
_.currentLeft = -(_.currentLeft);
}
$({
animStart: _.currentLeft
}).animate({
animStart: targetLeft
}, {
duration: _.options.speed,
easing: _.options.easing,
step: function(now) {
now = Math.ceil(now);
if (_.options.vertical === false) {
animProps[_.animType] = 'translate(' +
now + 'px, 0px)';
_.$slideTrack.css(animProps);
} else {
animProps[_.animType] = 'translate(0px,' +
now + 'px)';
_.$slideTrack.css(animProps);
}
},
complete: function() {
if (callback) {
callback.call();
}
}
});
} else {
_.applyTransition();
targetLeft = Math.ceil(targetLeft);
if (_.options.vertical === false) {
animProps[_.animType] = 'translate3d(' + targetLeft + 'px, 0px, 0px)';
} else {
animProps[_.animType] = 'translate3d(0px,' + targetLeft + 'px, 0px)';
}
_.$slideTrack.css(animProps);
if (callback) {
setTimeout(function() {
_.disableTransition();
callback.call();
}, _.options.speed);
}
}
}
};
Slick.prototype.getNavTarget = function() {
var _ = this,
asNavFor = _.options.asNavFor;
if ( asNavFor && asNavFor !== null ) {
asNavFor = $(asNavFor).not(_.$slider);
}
return asNavFor;
};
Slick.prototype.asNavFor = function(index) {
var _ = this,
asNavFor = _.getNavTarget();
if ( asNavFor !== null && typeof asNavFor === 'object' ) {
asNavFor.each(function() {
var target = $(this).slick('getSlick');
if(!target.unslicked) {
target.slideHandler(index, true);
}
});
}
};
Slick.prototype.applyTransition = function(slide) {
var _ = this,
transition = {};
if (_.options.fade === false) {
transition[_.transitionType] = _.transformType + ' ' + _.options.speed + 'ms ' + _.options.cssEase;
} else {
transition[_.transitionType] = 'opacity ' + _.options.speed + 'ms ' + _.options.cssEase;
}
if (_.options.fade === false) {
_.$slideTrack.css(transition);
} else {
_.$slides.eq(slide).css(transition);
}
};
Slick.prototype.autoPlay = function() {
var _ = this;
_.autoPlayClear();
if ( _.slideCount > _.options.slidesToShow ) {
_.autoPlayTimer = setInterval( _.autoPlayIterator, _.options.autoplaySpeed );
}
};
Slick.prototype.autoPlayClear = function() {
var _ = this;
if (_.autoPlayTimer) {
clearInterval(_.autoPlayTimer);
}
};
Slick.prototype.autoPlayIterator = function() {
var _ = this,
slideTo = _.currentSlide + _.options.slidesToScroll;
if ( !_.paused && !_.interrupted && !_.focussed ) {
if ( _.options.infinite === false ) {
if ( _.direction === 1 && ( _.currentSlide + 1 ) === ( _.slideCount - 1 )) {
_.direction = 0;
}
else if ( _.direction === 0 ) {
slideTo = _.currentSlide - _.options.slidesToScroll;
if ( _.currentSlide - 1 === 0 ) {
_.direction = 1;
}
}
}
_.slideHandler( slideTo );
}
};
Slick.prototype.buildArrows = function() {
var _ = this;
if (_.options.arrows === true ) {
_.$prevArrow = $(_.options.prevArrow).addClass('slick-arrow');
_.$nextArrow = $(_.options.nextArrow).addClass('slick-arrow');
if( _.slideCount > _.options.slidesToShow ) {
_.$prevArrow.removeClass('slick-hidden').removeAttr('aria-hidden tabindex');
_.$nextArrow.removeClass('slick-hidden').removeAttr('aria-hidden tabindex');
if (_.htmlExpr.test(_.options.prevArrow)) {
_.$prevArrow.prependTo(_.options.appendArrows);
}
if (_.htmlExpr.test(_.options.nextArrow)) {
_.$nextArrow.appendTo(_.options.appendArrows);
}
if (_.options.infinite !== true) {
_.$prevArrow
.addClass('slick-disabled')
.attr('aria-disabled', 'true');
}
} else {
_.$prevArrow.add( _.$nextArrow )
.addClass('slick-hidden')
.attr({
'aria-disabled': 'true',
'tabindex': '-1'
});
}
}
};
Slick.prototype.buildDots = function() {
var _ = this,
i, dot;
if (_.options.dots === true && _.slideCount > _.options.slidesToShow) {
_.$slider.addClass('slick-dotted');
dot = $('<ul />').addClass(_.options.dotsClass);
for (i = 0; i <= _.getDotCount(); i += 1) {
dot.append($('<li />').append(_.options.customPaging.call(this, _, i)));
}
_.$dots = dot.appendTo(_.options.appendDots);
_.$dots.find('li').first().addClass('slick-active');
}
};
Slick.prototype.buildOut = function() {
var _ = this;
_.$slides =
_.$slider
.children( _.options.slide + ':not(.slick-cloned)')
.addClass('slick-slide');
_.slideCount = _.$slides.length;
_.$slides.each(function(index, element) {
$(element)
.attr('data-slick-index', index)
.data('originalStyling', $(element).attr('style') || '');
});
_.$slider.addClass('slick-slider');
_.$slideTrack = (_.slideCount === 0) ?
$('<div class="slick-track"/>').appendTo(_.$slider) :
_.$slides.wrapAll('<div class="slick-track"/>').parent();
_.$list = _.$slideTrack.wrap(
'<div class="slick-list"/>').parent();
_.$slideTrack.css('opacity', 0);
if (_.options.centerMode === true || _.options.swipeToSlide === true) {
_.options.slidesToScroll = 1;
}
$('img[data-lazy]', _.$slider).not('[src]').addClass('slick-loading');
_.setupInfinite();
_.buildArrows();
_.buildDots();
_.updateDots();
_.setSlideClasses(typeof _.currentSlide === 'number' ? _.currentSlide : 0);
if (_.options.draggable === true) {
_.$list.addClass('draggable');
}
};
Slick.prototype.buildRows = function() {
var _ = this, a, b, c, newSlides, numOfSlides, originalSlides,slidesPerSection;
newSlides = document.createDocumentFragment();
originalSlides = _.$slider.children();
if(_.options.rows > 0) {
slidesPerSection = _.options.slidesPerRow * _.options.rows;
numOfSlides = Math.ceil(
originalSlides.length / slidesPerSection
);
for(a = 0; a < numOfSlides; a++){
var slide = document.createElement('div');
for(b = 0; b < _.options.rows; b++) {
var row = document.createElement('div');
for(c = 0; c < _.options.slidesPerRow; c++) {
var target = (a * slidesPerSection + ((b * _.options.slidesPerRow) + c));
if (originalSlides.get(target)) {
row.appendChild(originalSlides.get(target));
}
}
slide.appendChild(row);
}
newSlides.appendChild(slide);
}
_.$slider.empty().append(newSlides);
_.$slider.children().children().children()
.css({
'width':(100 / _.options.slidesPerRow) + '%',
'display': 'inline-block'
});
}
};
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]);
}
}
};
Slick.prototype.changeSlide = function(event, dontAnimate) {
var _ = this,
$target = $(event.currentTarget),
indexOffset, slideOffset, unevenOffset;
// If target is a link, prevent default action.
if($target.is('a')) {
event.preventDefault();
}
// If target is not the <li> element (ie: a child), find the <li>.
if(!$target.is('li')) {
$target = $target.closest('li');
}
unevenOffset = (_.slideCount % _.options.slidesToScroll !== 0);
indexOffset = unevenOffset ? 0 : (_.slideCount - _.currentSlide) % _.options.slidesToScroll;
switch (event.data.message) {
case 'previous':
slideOffset = indexOffset === 0 ? _.options.slidesToScroll : _.options.slidesToShow - indexOffset;
if (_.slideCount > _.options.slidesToShow) {
_.slideHandler(_.currentSlide - slideOffset, false, dontAnimate);
}
break;
case 'next':
slideOffset = indexOffset === 0 ? _.options.slidesToScroll : indexOffset;
if (_.slideCount > _.options.slidesToShow) {
_.slideHandler(_.currentSlide + slideOffset, false, dontAnimate);
}
break;
case 'index':
var index = event.data.index === 0 ? 0 :
event.data.index || $target.index() * _.options.slidesToScroll;
_.slideHandler(_.checkNavigable(index), false, dontAnimate);
$target.children().trigger('focus');
break;
default:
return;
}
};
Slick.prototype.checkNavigable = function(index) {
var _ = this,
navigables, prevNavigable;
navigables = _.getNavigableIndexes();
prevNavigable = 0;
if (index > navigables[navigables.length - 1]) {
index = navigables[navigables.length - 1];
} else {
for (var n in navigables) {
if (index < navigables[n]) {
index = prevNavigable;
break;
}
prevNavigable = navigables[n];
}
}
return index;
};
Slick.prototype.cleanUpEvents = function() {
var _ = this;
if (_.options.dots && _.$dots !== null) {
$('li', _.$dots)
.off('click.slick', _.changeSlide)
.off('mouseenter.slick', $.proxy(_.interrupt, _, true))
.off('mouseleave.slick', $.proxy(_.interrupt, _, false));
if (_.options.accessibility === true) {
_.$dots.off('keydown.slick', _.keyHandler);
}
}
_.$slider.off('focus.slick blur.slick');
if (_.options.arrows === true && _.slideCount > _.options.slidesToShow) {
_.$prevArrow && _.$prevArrow.off('click.slick', _.changeSlide);
_.$nextArrow && _.$nextArrow.off('click.slick', _.changeSlide);
if (_.options.accessibility === true) {
_.$prevArrow && _.$prevArrow.off('keydown.slick', _.keyHandler);
_.$nextArrow && _.$nextArrow.off('keydown.slick', _.keyHandler);
}
}
_.$list.off('touchstart.slick mousedown.slick', _.swipeHandler);
_.$list.off('touchmove.slick mousemove.slick', _.swipeHandler);
_.$list.off('touchend.slick mouseup.slick', _.swipeHandler);
_.$list.off('touchcancel.slick mouseleave.slick', _.swipeHandler);
_.$list.off('click.slick', _.clickHandler);
$(document).off(_.visibilityChange, _.visibility);
_.cleanUpSlideEvents();
if (_.options.accessibility === true) {
_.$list.off('keydown.slick', _.keyHandler);
}
if (_.options.focusOnSelect === true) {
$(_.$slideTrack).children().off('click.slick', _.selectHandler);
}
$(window).off('orientationchange.slick.slick-' + _.instanceUid, _.orientationChange);
$(window).off('resize.slick.slick-' + _.instanceUid, _.resize);
$('[draggable!=true]', _.$slideTrack).off('dragstart', _.preventDefault);
$(window).off('load.slick.slick-' + _.instanceUid, _.setPosition);
};
Slick.prototype.cleanUpSlideEvents = function() {
var _ = this;
_.$list.off('mouseenter.slick', $.proxy(_.interrupt, _, true));
_.$list.off('mouseleave.slick', $.proxy(_.interrupt, _, false));
};
Slick.prototype.cleanUpRows = function() {
var _ = this, originalSlides;
if(_.options.rows > 0) {
originalSlides = _.$slides.children().children();
originalSlides.removeAttr('style');
_.$slider.empty().append(originalSlides);
}
};
Slick.prototype.clickHandler = function(event) {
var _ = this;
if (_.shouldClick === false) {
event.stopImmediatePropagation();
event.stopPropagation();
event.preventDefault();
}
};
Slick.prototype.destroy = function(refresh) {
var _ = this;
_.autoPlayClear();
_.touchObject = {};
_.cleanUpEvents();
$('.slick-cloned', _.$slider).detach();
if (_.$dots) {
_.$dots.remove();
}
if ( _.$prevArrow && _.$prevArrow.length ) {
_.$prevArrow
.removeClass('slick-disabled slick-arrow slick-hidden')
.removeAttr('aria-hidden aria-disabled tabindex')
.css('display','');
if ( _.htmlExpr.test( _.options.prevArrow )) {
_.$prevArrow.remove();
}
}
if ( _.$nextArrow && _.$nextArrow.length ) {
_.$nextArrow
.removeClass('slick-disabled slick-arrow slick-hidden')
.removeAttr('aria-hidden aria-disabled tabindex')
.css('display','');
if ( _.htmlExpr.test( _.options.nextArrow )) {
_.$nextArrow.remove();
}
}
if (_.$slides) {
_.$slides
.removeClass('slick-slide slick-active slick-center slick-visible slick-current')
.removeAttr('aria-hidden')
.removeAttr('data-slick-index')
.each(function(){
$(this).attr('style', $(this).data('originalStyling'));
});
_.$slideTrack.children(this.options.slide).detach();
_.$slideTrack.detach();
_.$list.detach();
_.$slider.append(_.$slides);
}
_.cleanUpRows();
_.$slider.removeClass('slick-slider');
_.$slider.removeClass('slick-initialized');
_.$slider.removeClass('slick-dotted');
_.unslicked = true;
if(!refresh) {
_.$slider.trigger('destroy', [_]);
}
};
Slick.prototype.disableTransition = function(slide) {
var _ = this,
transition = {};
transition[_.transitionType] = '';
if (_.options.fade === false) {
_.$slideTrack.css(transition);
} else {
_.$slides.eq(slide).css(transition);
}
};
Slick.prototype.fadeSlide = function(slideIndex, callback) {
var _ = this;
if (_.cssTransitions === false) {
_.$slides.eq(slideIndex).css({
zIndex: _.options.zIndex
});
_.$slides.eq(slideIndex).animate({
opacity: 1
}, _.options.speed, _.options.easing, callback);
} else {
_.applyTransition(slideIndex);
_.$slides.eq(slideIndex).css({
opacity: 1,
zIndex: _.options.zIndex
});
if (callback) {
setTimeout(function() {
_.disableTransition(slideIndex);
callback.call();
}, _.options.speed);
}
}
};
Slick.prototype.fadeSlideOut = function(slideIndex) {
var _ = this;
if (_.cssTransitions === false) {
_.$slides.eq(slideIndex).animate({
opacity: 0,
zIndex: _.options.zIndex - 2
}, _.options.speed, _.options.easing);
} else {
_.applyTransition(slideIndex);
_.$slides.eq(slideIndex).css({
opacity: 0,
zIndex: _.options.zIndex - 2
});
}
};
Slick.prototype.filterSlides = Slick.prototype.slickFilter = function(filter) {
var _ = this;
if (filter !== null) {
_.$slidesCache = _.$slides;