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/*!
 * better-normal-scroll v1.14.1
 * (c) 2016-2019 ustbhuangyi
 * Released under the MIT License.
 */
!function(t,i){"object"==typeof exports&&"undefined"!=typeof module?module.exports=i():"function"==typeof define&&define.amd?define(i):t.BScroll=i()}(this,function(){"use strict";function o(t,i){for(;i+1<t.length;i++)t[i]=t[i+1];t.pop()}var l=function(t,i){if(Array.isArray(t))return t;if(Symbol.iterator in Object(t))return function(t,i){var e=[],s=!0,o=!1,n=void 0;try{for(var r,h=t[Symbol.iterator]();!(s=(r=h.next()).done)&&(e.push(r.value),!i||e.length!==i);s=!0);}catch(t){o=!0,n=t}finally{try{!s&&h.return&&h.return()}finally{if(o)throw n}}return e}(t,i);throw new TypeError("Invalid attempt to destructure non-iterable instance")};var e="undefined"!=typeof window,t=e&&navigator.userAgent.toLowerCase(),i=t&&/wechatdevtools/.test(t),s=t&&0<t.indexOf("android");function w(){return window.performance&&window.performance.now?window.performance.now()+window.performance.timing.navigationStart:+new Date}function a(t){for(var i=arguments.length,e=Array(1<i?i-1:0),s=1;s<i;s++)e[s-1]=arguments[s];for(var o=0;o<e.length;o++){var n=e[o];for(var r in n)t[r]=n[r]}return t}function c(t){return null==t}function d(t,i){return Math.sqrt(t*t+i*i)}var n=e&&document.createElement("div").style,r=function(){if(!e)return!1;var t={webkit:"webkitTransform",Moz:"MozTransform",O:"OTransform",ms:"msTransform",standard:"transform"};for(var i in t)if(void 0!==n[t[i]])return i;return!1}();function h(t){return!1!==r&&("standard"===r?"transitionEnd"===t?"transitionend":t:r+t.charAt(0).toUpperCase()+t.substr(1))}function p(t,i,e,s){t.addEventListener(i,e,{passive:!1,capture:!!s})}function u(t,i,e,s){t.removeEventListener(i,e,{passive:!1,capture:!!s})}function m(t){for(var i=0,e=0;t;)i-=t.offsetLeft,e-=t.offsetTop,t=t.offsetParent;return{left:i,top:e}}function f(t){var i=t.getBoundingClientRect();return{left:-(i.left+window.pageXOffset),top:-(i.top+window.pageYOffset)}}var g=r&&"standard"!==r?"-"+r.toLowerCase()+"-":"",v=h("transform"),y=h("transition"),x=e&&h("perspective")in n,T=e&&("ontouchstart"in window||i),S=!1!==v,b=e&&y in n,_={transform:v,transition:y,transitionTimingFunction:h("transitionTimingFunction"),transitionDuration:h("transitionDuration"),transitionDelay:h("transitionDelay"),transformOrigin:h("transformOrigin"),transitionEnd:h("transitionEnd")},Y={touchstart:1,touchmove:1,touchend:1,mousedown:2,mousemove:2,mouseup:2};function X(t){if(t instanceof window.SVGElement){var i=t.getBoundingClientRect();return{top:i.top,left:i.left,width:i.width,height:i.height}}return{top:t.offsetTop,left:t.offsetLeft,width:t.offsetWidth,height:t.offsetHeight}}function M(t,i){for(var e in i)if(i[e].test(t[e]))return!0;return!1}function P(t){var i=1<arguments.length&&void 0!==arguments[1]?arguments[1]:"click",e=void 0;"mouseup"===t.type||"mousecancel"===t.type?e=t:"touchend"!==t.type&&"touchcancel"!==t.type||(e=t.changedTouches[0]);var s={};e&&(s.screenX=e.screenX||0,s.screenY=e.screenY||0,s.clientX=e.clientX||0,s.clientY=e.clientY||0);var o=void 0,n=!0,r=!0;if("undefined"!=typeof MouseEvent)try{o=new MouseEvent(i,a({bubbles:n,cancelable:r},s))}catch(t){h()}else h();function h(){(o=document.createEvent("Event")).initEvent(i,n,r),a(o,s)}o.forwardedTouchEvent=!0,o._constructed=!0,t.target.dispatchEvent(o)}function E(t,i){t.removeChild(i)}var D={startX:0,startY:0,scrollX:!1,scrollY:!0,freeScroll:!1,directionLockThreshold:5,eventPassthrough:"",click:!1,tap:!1,bounce:!0,bounceTime:800,momentum:!0,momentumLimitTime:300,momentumLimitDistance:15,swipeTime:2500,swipeBounceTime:500,deceleration:.0015,flickLimitTime:200,flickLimitDistance:100,resizePolling:60,probeType:0,preventDefault:!0,preventDefaultException:{tagName:/^(INPUT|TEXTAREA|BUTTON|SELECT|AUDIO)$/},HWCompositing:!0,useTransition:!0,useTransform:!0,bindToWrapper:!1,disableMouse:T,disableTouch:!T,observeDOM:!0,autoBlur:!0,wheel:!1,snap:!1,scrollbar:!1,pullDownRefresh:!1,pullUpLoad:!1,mouseWheel:!1,stopPropagation:!1,zoom:!1,infinity:!1,dblclick:!1};var I={swipe:{style:"cubic-bezier(0.23, 1, 0.32, 1)",fn:function(t){return 1+--t*t*t*t*t}},swipeBounce:{style:"cubic-bezier(0.25, 0.46, 0.45, 0.94)",fn:function(t){return t*(2-t)}},bounce:{style:"cubic-bezier(0.165, 0.84, 0.44, 1)",fn:function(t){return 1- --t*t*t*t}}};function H(t,i,e,s,o,n,r){var h=t-i,a=Math.abs(h)/e,l=r.deceleration,c=r.itemHeight,p=r.swipeBounceTime,d=r.wheel,u=r.swipeTime,m=d?4:15,f=t+a/l*(h<0?-1:1);return d&&c&&(f=Math.round(f/c)*c),f<s?(f=n?Math.max(s-n/4,s-n/m*a):s,u=p):o<f&&(f=n?Math.min(o+n/4,o+n/m*a):o,u=p),{destination:Math.round(f),duration:u}}function k(){}var z=e?window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||function(t){return window.setTimeout(t,(t.interval||100/60)/2)}:k,W=e?window.cancelAnimationFrame||window.webkitCancelAnimationFrame||window.mozCancelAnimationFrame||window.oCancelAnimationFrame||function(t){window.clearTimeout(t)}:k;function A(t){console.error("[BScroll warn]: "+t)}function C(t,i){if(!t)throw new Error("[BScroll] "+i)}function O(t){var i=document.createElement("div"),e=document.createElement("div");return i.style.cssText="position:absolute;z-index:9999;pointerEvents:none",e.style.cssText="box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px;",e.className="bscroll-indicator",i.className="horizontal"===t?(i.style.cssText+=";height:7px;left:2px;right:2px;bottom:0",e.style.height="100%","bscroll-horizontal-scrollbar"):(i.style.cssText+=";width:7px;bottom:2px;top:2px;right:1px",e.style.width="100%","bscroll-vertical-scrollbar"),i.style.cssText+=";overflow:hidden",i.appendChild(e),i}function L(t,i){this.wrapper=i.el,this.wrapperStyle=this.wrapper.style,this.indicator=this.wrapper.children[0],this.indicatorStyle=this.indicator.style,this.scroller=t,this.direction=i.direction,i.fade?(this.visible=0,this.wrapperStyle.opacity="0"):this.visible=1,this.sizeRatioX=1,this.sizeRatioY=1,this.maxPosX=0,this.maxPosY=0,this.x=0,this.y=0,i.interactive&&this._addDOMEvents()}L.prototype.handleEvent=function(t){switch(t.type){case"touchstart":case"mousedown":this._start(t);break;case"touchmove":case"mousemove":this._move(t);break;case"touchend":case"mouseup":case"touchcancel":case"mousecancel":this._end(t)}},L.prototype.refresh=function(){this._shouldShow()&&(this.transitionTime(),this._calculate(),this.updatePosition())},L.prototype.fade=function(t,i){var e=this;if(!i||this.visible){var s=t?250:500;t=t?"1":"0",this.wrapperStyle[_.transitionDuration]=s+"ms",clearTimeout(this.fadeTimeout),this.fadeTimeout=setTimeout(function(){e.wrapperStyle.opacity=t,e.visible=+t},0)}},L.prototype.updatePosition=function(){if("vertical"===this.direction){var t=Math.round(this.sizeRatioY*this.scroller.y);if(t<0){this.transitionTime(500);var i=Math.max(this.indicatorHeight+3*t,8);this.indicatorStyle.height=i+"px",t=0}else if(t>this.maxPosY){this.transitionTime(500);var e=Math.max(this.indicatorHeight-3*(t-this.maxPosY),8);this.indicatorStyle.height=e+"px",t=this.maxPosY+this.indicatorHeight-e}else this.indicatorStyle.height=this.indicatorHeight+"px";this.y=t,this.scroller.options.useTransform?this.indicatorStyle[_.transform]="translateY("+t+"px)"+this.scroller.translateZ:this.indicatorStyle.top=t+"px"}else{var s=Math.round(this.sizeRatioX*this.scroller.x);if(s<0){this.transitionTime(500);var o=Math.max(this.indicatorWidth+3*s,8);this.indicatorStyle.width=o+"px",s=0}else if(s>this.maxPosX){this.transitionTime(500);var n=Math.max(this.indicatorWidth-3*(s-this.maxPosX),8);this.indicatorStyle.width=n+"px",s=this.maxPosX+this.indicatorWidth-n}else this.indicatorStyle.width=this.indicatorWidth+"px";this.x=s,this.scroller.options.useTransform?this.indicatorStyle[_.transform]="translateX("+s+"px)"+this.scroller.translateZ:this.indicatorStyle.left=s+"px"}},L.prototype.transitionTime=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:0;this.indicatorStyle[_.transitionDuration]=t+"ms"},L.prototype.transitionTimingFunction=function(t){this.indicatorStyle[_.transitionTimingFunction]=t},L.prototype.destroy=function(){this._removeDOMEvents(),this.wrapper.parentNode.removeChild(this.wrapper)},L.prototype._start=function(t){var i=t.touches?t.touches[0]:t;t.preventDefault(),t.stopPropagation(),this.transitionTime(),this.initiated=!0,this.moved=!1,this.lastPointX=i.pageX,this.lastPointY=i.pageY,this.startTime=w(),this._handleMoveEvents(p),this.scroller.trigger("beforeScrollStart")},L.prototype._move=function(t){var i=t.touches?t.touches[0]:t;t.preventDefault(),t.stopPropagation(),this.moved||this.scroller.trigger("scrollStart"),this.moved=!0;var e=i.pageX-this.lastPointX;this.lastPointX=i.pageX;var s=i.pageY-this.lastPointY;this.lastPointY=i.pageY;var o=this.x+e,n=this.y+s;this._pos(o,n)},L.prototype._end=function(t){if(this.initiated){this.initiated=!1,t.preventDefault(),t.stopPropagation(),this._handleMoveEvents(u);var i=this.scroller.options.snap;if(i){var e=i.speed,s=i.easing,o=void 0===s?I.bounce:s,n=this.scroller._nearestSnap(this.scroller.x,this.scroller.y),r=e||Math.max(Math.max(Math.min(Math.abs(this.scroller.x-n.x),1e3),Math.min(Math.abs(this.scroller.y-n.y),1e3)),300);this.scroller.x===n.x&&this.scroller.y===n.y||(this.scroller.directionX=0,this.scroller.directionY=0,this.scroller.currentPage=n,this.scroller.scrollTo(n.x,n.y,r,o))}this.moved&&this.scroller.trigger("scrollEnd",{x:this.scroller.x,y:this.scroller.y})}},L.prototype._pos=function(t,i){t<0?t=0:t>this.maxPosX&&(t=this.maxPosX),i<0?i=0:i>this.maxPosY&&(i=this.maxPosY),t=Math.round(t/this.sizeRatioX),i=Math.round(i/this.sizeRatioY),this.scroller.scrollTo(t,i),this.scroller.trigger("scroll",{x:this.scroller.x,y:this.scroller.y})},L.prototype._shouldShow=function(){return"vertical"===this.direction&&this.scroller.hasVerticalScroll||"horizontal"===this.direction&&this.scroller.hasHorizontalScroll?!(this.wrapper.style.display=""):!(this.wrapper.style.display="none")},L.prototype._calculate=function(){if("vertical"===this.direction){var t=this.wrapper.clientHeight;this.indicatorHeight=Math.max(Math.round(t*t/(this.scroller.scrollerHeight||t||1)),8),this.indicatorStyle.height=this.indicatorHeight+"px",this.maxPosY=t-this.indicatorHeight,this.sizeRatioY=this.maxPosY/this.scroller.maxScrollY}else{var i=this.wrapper.clientWidth;this.indicatorWidth=Math.max(Math.round(i*i/(this.scroller.scrollerWidth||i||1)),8),this.indicatorStyle.width=this.indicatorWidth+"px",this.maxPosX=i-this.indicatorWidth,this.sizeRatioX=this.maxPosX/this.scroller.maxScrollX}},L.prototype._addDOMEvents=function(){var t=p;this._handleDOMEvents(t)},L.prototype._removeDOMEvents=function(){var t=u;this._handleDOMEvents(t),this._handleMoveEvents(t)},L.prototype._handleMoveEvents=function(t){this.scroller.options.disableTouch||t(window,"touchmove",this),this.scroller.options.disableMouse||t(window,"mousemove",this)},L.prototype._handleDOMEvents=function(t){this.scroller.options.disableTouch||(t(this.indicator,"touchstart",this),t(window,"touchend",this)),this.scroller.options.disableMouse||(t(this.indicator,"mousedown",this),t(window,"mouseup",this))};var R,F,U,N,B,q,V,Z,j,G;function $(t){if(t&&t.classList)return t.classList.contains("tombstone")}function J(t,i){var e=this;this.options=i,C("function"==typeof this.options.createTombstone,"Infinite scroll need createTombstone Function to create tombstone"),C("function"==typeof this.options.fetch,"Infinite scroll need fetch Function to fetch new data."),C("function"==typeof this.options.render,"Infinite scroll need render Function to render each item."),this.firstAttachedItem=0,this.lastAttachedItem=0,this.anchorScrollTop=0,this.anchorItem={index:0,offset:0},this.tombstoneHeight=0,this.tombstoneWidth=0,this.tombstones=[],this.tombstonesAnimationHandlers=[],this.items=[],this.loadedItems=0,this.requestInProgress=!1,this.hasMore=!0,this.scroller=t,this.wrapperEl=this.scroller.wrapper,this.scrollerEl=this.scroller.scroller,this.scroller.on("scroll",function(){e.onScroll()}),this.scroller.on("resize",function(){e.onResize()}),this.scroller.on("destroy",function(){e.destroy()}),this._onResizeHandler=setTimeout(function(){e.onResize()})}function K(t,i){this.wrapper="string"==typeof t?document.querySelector(t):t,this.wrapper||A("Can not resolve the wrapper DOM."),this.scroller=this.wrapper.children[0],this.scroller||A("The wrapper need at least one child element to be scroller."),this.scrollerStyle=this.scroller.style,this._init(i)}return J.prototype.destroy=function(){var i=this;clearTimeout(this._onResizeHandler),this.tombstonesAnimationHandlers.forEach(function(t){clearTimeout(t)}),this.tombstonesAnimationHandlers=null,this.items.forEach(function(t){t.node&&(i.scrollerEl.removeChild(t.node),t.node=null)}),this.scroller.infiniteScroller=null,this.scroller=null,this.wrapperEl=null,this.scrollerEl=null,this.items=null,this.tombstones=null},J.prototype.onScroll=function(){var t=-this.scroller.y,i=t-this.anchorScrollTop;this.anchorItem=0===t?{index:0,offset:0}:this._calculateAnchoredItem(this.anchorItem,i),this.anchorScrollTop=t;var e=this._calculateAnchoredItem(this.anchorItem,this.scroller.wrapperHeight),s=this.anchorItem.index,o=e.index;i<0?(s-=30,o+=10):(s-=10,o+=30),this.fill(s,o),this.maybeRequestContent()},J.prototype.onResize=function(){var t=this.options.createTombstone();t.style.position="absolute",this.scrollerEl.appendChild(t),t.style.display="",this.tombstoneHeight=t.offsetHeight,this.tombstoneWidth=t.offsetWidth,this.scrollerEl.removeChild(t);for(var i=0;i<this.items.length;i++)this.items[i].height=this.items[i].width=0;this.onScroll()},J.prototype.fill=function(t,i){this.firstAttachedItem=Math.max(0,t),this.hasMore||(i=Math.min(i,this.items.length)),this.lastAttachedItem=i,this.attachContent()},J.prototype.maybeRequestContent=function(){var s=this;if(!this.requestInProgress&&this.hasMore){var t=this.lastAttachedItem-this.loadedItems;t<=0||(this.requestInProgress=!0,this.options.fetch(t).then(function(t){if(s.requestInProgress=!1,t)s.addContent(t);else{s.hasMore=!1;var i=s._removeTombstones(),e=0;s.anchorItem.index<=s.items.length?(e=s._fixScrollPosition(),s._setupAnimations({},e),s.scroller.resetPosition(s.scroller.options.bounceTime)):(s.anchorItem.index-=i,e=s._fixScrollPosition(),s._setupAnimations({},e),s.scroller.stop(),s.scroller.resetPosition(),s.onScroll())}}))}},J.prototype.addContent=function(t){for(var i=0;i<t.length;i++)this.items.length<=this.loadedItems&&this._addItem(),this.items[this.loadedItems++].data=t[i];this.attachContent(),this.maybeRequestContent()},J.prototype.attachContent=function(){var t=this._collectUnusedNodes(),i=this._createDOMNodes(t);this._cleanupUnusedNodes(t),this._cacheNodeSize();var e=this._fixScrollPosition();this._setupAnimations(i,e)},J.prototype.resetMore=function(){this.hasMore=!0},J.prototype._removeTombstones=function(){for(var t,i=void 0,e=this.items.length,s=0;s<e;s++){var o=this.items[s].node,n=this.items[s].data;o&&!$(o)||n||(void 0===i&&(i=s),o&&this.scrollerEl.removeChild(o))}return t=e-i,this.items.splice(i),this.lastAttachedItem=Math.min(this.lastAttachedItem,this.items.length),t},J.prototype._collectUnusedNodes=function(){for(var t=[],i=0;i<this.items.length;i++)if(i!==this.firstAttachedItem){var e=this.items[i].node;e&&($(e)?(this.tombstones.push(e),this.tombstones[this.tombstones.length-1].style.display="none"):t.push(e)),this.items[i].node=null}else i=this.lastAttachedItem-1;return t},J.prototype._createDOMNodes=function(t){for(var i={},e=this.firstAttachedItem;e<this.lastAttachedItem;e++){for(;this.items.length<=e;)this._addItem();var s=this.items[e].node,o=this.items[e].data;if(s){if(!$(s)||!o)continue;s.style.zIndex=1,i[e]=[s,this.items[e].top-this.anchorScrollTop],this.items[e].node=null}var n=o?this.options.render(o,t.pop()):this._getTombStone();n.style.position="absolute",this.items[e].top=-1,this.scrollerEl.appendChild(n),this.items[e].node=n}return i},J.prototype._cleanupUnusedNodes=function(t){for(;t.length;)this.scrollerEl.removeChild(t.pop())},J.prototype._cacheNodeSize=function(){for(var t=this.firstAttachedItem;t<this.lastAttachedItem;t++){var i=this.items[t];if(i.data&&!i.height){var e=$(i.node);i.height=e?this.tombstoneHeight:i.node.offsetHeight,i.width=e?this.tombstoneWidth:i.node.offsetWidth}}},J.prototype._fixScrollPosition=function(){for(var t=this.anchorScrollTop=0;t<this.anchorItem.index;t++)this.anchorScrollTop+=this.items[t].height||this.tombstoneHeight;this.anchorScrollTop+=this.anchorItem.offset;for(var i=this.anchorScrollTop-this.anchorItem.offset,e=this.anchorItem.index;e>this.firstAttachedItem;)i-=this.items[e-1].height||this.tombstoneHeight,e--;return i},J.prototype._setupAnimations=function(e,t){var s=this;for(var i in e){var o=e[i];this.items[i].node.style[_.transform]="translateY("+(this.anchorScrollTop+o[1])+"px) scale("+this.tombstoneWidth/this.items[i].width+", "+this.tombstoneHeight/this.items[i].height+")",this.items[i].node.offsetTop,o[0].offsetTop,this.items[i].node.style[_.transition]=g+"transform 200ms"}for(var n=this.firstAttachedItem;n<this.lastAttachedItem;n++){var r=e[n];if(r){var h=r[0];h.style[_.transition]=g+"transform 200ms, opacity 200ms",h.style[_.transform]="translateY("+t+"px) scale("+this.items[n].width/this.tombstoneWidth+", "+this.items[n].height/this.tombstoneHeight+")",h.style.opacity=0}t!==this.items[n].top&&(r||(this.items[n].node.style[_.transition]=""),this.items[n].node.style[_.transform]="translateY("+t+"px)"),this.items[n].top=t,t+=this.items[n].height||this.tombstoneHeight}this.scroller.maxScrollY=-(t-this.scroller.wrapperHeight+(this.hasMore?2e3:0));var a=setTimeout(function(){for(var t in e){var i=e[t];i[0].style.display="none",s.tombstones.push(i[0])}},200);this.tombstonesAnimationHandlers.push(a)},J.prototype._getTombStone=function(){var t=this.tombstones.pop();return t?(t.style.display="",t.style.opacity=1,t.style[_.transform]="",t.style[_.transition]="",t):this.options.createTombstone()},J.prototype._addItem=function(){this.items.push({data:null,node:null,height:0,width:0,top:0})},J.prototype._calculateAnchoredItem=function(t,i){if(0===i)return t;var e=t.index,s=0;if((i+=t.offset)<0){for(;i<0&&0<e&&this.items[e-1].height;)i+=this.items[e-1].height,e--;s=Math.max(-e,Math.ceil(Math.min(i,0)/this.tombstoneHeight))}else{for(;0<i&&e<this.items.length&&this.items[e].height&&this.items[e].height<i;)i-=this.items[e].height,e++;(e>=this.items.length||!this.items[e].height)&&(s=Math.floor(Math.max(i,0)/this.tombstoneHeight))}return{index:e+=s,offset:i-=s*this.tombstoneHeight}},(R=K).prototype._init=function(t){this._handleOptions(t),this._events={},this.x=0,this.y=0,this.directionX=0,this.directionY=0,this.setScale(1),this._addDOMEvents(),this._initExtFeatures(),this._watchTransition(),this.options.observeDOM&&this._initDOMObserver(),this.options.autoBlur&&this._handleAutoBlur(),this.refresh(),this.options.snap||this.scrollTo(this.options.startX,this.options.startY),this.enable()},R.prototype.setScale=function(t){this.lastScale=c(this.scale)?t:this.scale,this.scale=t},R.prototype._handleOptions=function(t){this.options=a({},D,t),this.translateZ=this.options.HWCompositing&&x?" translateZ(0)":"",this.options.useTransition=this.options.useTransition&&b,this.options.useTransform=this.options.useTransform&&S,this.options.preventDefault=!this.options.eventPassthrough&&this.options.preventDefault,this.options.scrollX="horizontal"!==this.options.eventPassthrough&&this.options.scrollX,this.options.scrollY="vertical"!==this.options.eventPassthrough&&this.options.scrollY,this.options.freeScroll=this.options.freeScroll&&!this.options.eventPassthrough,this.options.directionLockThreshold=this.options.eventPassthrough?0:this.options.directionLockThreshold,!0===this.options.tap&&(this.options.tap="tap")},R.prototype._addDOMEvents=function(){var t=p;this._handleDOMEvents(t)},R.prototype._removeDOMEvents=function(){var t=u;this._handleDOMEvents(t)},R.prototype._handleDOMEvents=function(t){var i=this.options.bindToWrapper?this.wrapper:window;t(window,"orientationchange",this),t(window,"resize",this),this.options.click&&t(this.wrapper,"click",this,!0),this.options.disableMouse||(t(this.wrapper,"mousedown",this),t(i,"mousemove",this),t(i,"mousecancel",this),t(i,"mouseup",this)),T&&!this.options.disableTouch&&(t(this.wrapper,"touchstart",this),t(i,"touchmove",this),t(i,"touchcancel",this),t(i,"touchend",this)),t(this.scroller,_.transitionEnd,this)},R.prototype._initExtFeatures=function(){this.options.snap&&this._initSnap(),this.options.scrollbar&&this._initScrollbar(),this.options.pullUpLoad&&this._initPullUp(),this.options.pullDownRefresh&&this._initPullDown(),this.options.wheel&&this._initWheel(),this.options.mouseWheel&&this._initMouseWheel(),this.options.zoom&&this._initZoom(),this.options.infinity&&this._initInfinite()},R.prototype._watchTransition=function(){if("function"==typeof Object.defineProperty){var o=this,n=!1,t=this.options.useTransition?"isInTransition":"isAnimating";Object.defineProperty(this,t,{get:function(){return n},set:function(t){n=t;for(var i=o.scroller.children.length?o.scroller.children:[o.scroller],e=n&&!o.pulling?"none":"auto",s=0;s<i.length;s++)i[s].style.pointerEvents=e}})}},R.prototype._handleAutoBlur=function(){this.on("scrollStart",function(){var t=document.activeElement;!t||"INPUT"!==t.tagName&&"TEXTAREA"!==t.tagName||t.blur()})},R.prototype._initDOMObserver=function(){var n=this;if("undefined"!=typeof MutationObserver){var r=void 0,t=new MutationObserver(function(t){if(!n._shouldNotRefresh()){for(var i=!1,e=!1,s=0;s<t.length;s++){var o=t[s];if("attributes"!==o.type){i=!0;break}if(o.target!==n.scroller){e=!0;break}}i?n.refresh():e&&(clearTimeout(r),r=setTimeout(function(){n._shouldNotRefresh()||n.refresh()},60))}});t.observe(this.scroller,{attributes:!0,childList:!0,subtree:!0}),this.on("destroy",function(){t.disconnect()})}else this._checkDOMUpdate()},R.prototype._shouldNotRefresh=function(){var t=this.x>this.minScrollX||this.x<this.maxScrollX||this.y>this.minScrollY||this.y<this.maxScrollY;return this.isInTransition||this.stopFromTransition||t},R.prototype._checkDOMUpdate=function(){var e=X(this.scroller),s=e.width,o=e.height;function n(){var t=this;setTimeout(function(){(function(){if(!this.destroyed){var t=(e=X(this.scroller)).width,i=e.height;s===t&&o===i||this.refresh(),s=t,o=i,n.call(this)}}).call(t)},1e3)}n.call(this)},R.prototype.handleEvent=function(t){switch(t.type){case"touchstart":case"mousedown":this._start(t),this.options.zoom&&t.touches&&1<t.touches.length&&this._zoomStart(t);break;case"touchmove":case"mousemove":this.options.zoom&&t.touches&&1<t.touches.length?this._zoom(t):this._move(t);break;case"touchend":case"mouseup":case"touchcancel":case"mousecancel":this.scaled?this._zoomEnd(t):this._end(t);break;case"orientationchange":case"resize":this._resize();break;case"transitionend":case"webkitTransitionEnd":case"oTransitionEnd":case"MSTransitionEnd":this._transitionEnd(t);break;case"click":this.enabled&&!t._constructed&&(M(t.target,this.options.preventDefaultException)||(t.preventDefault(),t.stopPropagation()));break;case"wheel":case"DOMMouseScroll":case"mousewheel":this._onMouseWheel(t)}},R.prototype.refresh=function(){var t="static"===window.getComputedStyle(this.wrapper,null).position,i=X(this.wrapper);this.wrapperWidth=i.width,this.wrapperHeight=i.height;var e=X(this.scroller);this.scrollerWidth=Math.round(e.width*this.scale),this.scrollerHeight=Math.round(e.height*this.scale),this.relativeX=e.left,this.relativeY=e.top,t&&(this.relativeX-=i.left,this.relativeY-=i.top),this.minScrollX=0,this.minScrollY=0;var s=this.options.wheel;s?(this.items=this.scroller.children,this.options.itemHeight=this.itemHeight=this.items.length?this.scrollerHeight/this.items.length:0,void 0===this.selectedIndex&&(this.selectedIndex=s.selectedIndex||0),this.options.startY=-this.selectedIndex*this.itemHeight,this.maxScrollX=0,this.maxScrollY=-this.itemHeight*(this.items.length-1)):(this.maxScrollX=this.wrapperWidth-this.scrollerWidth,this.options.infinity||(this.maxScrollY=this.wrapperHeight-this.scrollerHeight),this.maxScrollX<0?(this.maxScrollX-=this.relativeX,this.minScrollX=-this.relativeX):1<this.scale&&(this.maxScrollX=this.maxScrollX/2-this.relativeX,this.minScrollX=this.maxScrollX),this.maxScrollY<0?(this.maxScrollY-=this.relativeY,this.minScrollY=-this.relativeY):1<this.scale&&(this.maxScrollY=this.maxScrollY/2-this.relativeY,this.minScrollY=this.maxScrollY)),this.hasHorizontalScroll=this.options.scrollX&&this.maxScrollX<this.minScrollX,this.hasVerticalScroll=this.options.scrollY&&this.maxScrollY<this.minScrollY,this.hasHorizontalScroll||(this.maxScrollX=this.minScrollX,this.scrollerWidth=this.wrapperWidth),this.hasVerticalScroll||(this.maxScrollY=this.minScrollY,this.scrollerHeight=this.wrapperHeight),this.endTime=0,this.directionX=0,this.directionY=0,this.wrapperOffset=m(this.wrapper),this.trigger("refresh"),!this.scaled&&this.resetPosition()},R.prototype.enable=function(){this.enabled=!0},R.prototype.disable=function(){this.enabled=!1},(F=K).prototype._start=function(t){var i=Y[t.type];if((1===i||0===t.button)&&!(!this.enabled||this.destroyed||this.initiated&&this.initiated!==i)){this.initiated=i,this.options.preventDefault&&!M(t.target,this.options.preventDefaultException)&&t.preventDefault(),this.options.stopPropagation&&t.stopPropagation(),this.moved=!1,this.distX=0,this.distY=0,this.directionX=0,this.directionY=0,this.movingDirectionX=0,this.movingDirectionY=0,this.directionLocked=0,this._transitionTime(),this.startTime=w(),this.options.wheel&&(this.target=t.target),this.stop();var e=t.touches?t.touches[0]:t;this.startX=this.x,this.startY=this.y,this.absStartX=this.x,this.absStartY=this.y,this.pointX=e.pageX,this.pointY=e.pageY,this.trigger("beforeScrollStart")}},F.prototype._move=function(t){if(this.enabled&&!this.destroyed&&Y[t.type]===this.initiated){this.options.preventDefault&&t.preventDefault(),this.options.stopPropagation&&t.stopPropagation();var i=t.touches?t.touches[0]:t,e=i.pageX-this.pointX,s=i.pageY-this.pointY;this.pointX=i.pageX,this.pointY=i.pageY,this.distX+=e,this.distY+=s;var o=Math.abs(this.distX),n=Math.abs(this.distY),r=w();if(!(r-this.endTime>this.options.momentumLimitTime&&n<this.options.momentumLimitDistance&&o<this.options.momentumLimitDistance)){if(this.directionLocked||this.options.freeScroll||(o>n+this.options.directionLockThreshold?this.directionLocked="h":n>=o+this.options.directionLockThreshold?this.directionLocked="v":this.directionLocked="n"),"h"===this.directionLocked){if("vertical"===this.options.eventPassthrough)t.preventDefault();else if("horizontal"===this.options.eventPassthrough)return void(this.initiated=!1);s=0}else if("v"===this.directionLocked){if("horizontal"===this.options.eventPassthrough)t.preventDefault();else if("vertical"===this.options.eventPassthrough)return void(this.initiated=!1);e=0}e=this.hasHorizontalScroll?e:0,s=this.hasVerticalScroll?s:0,this.movingDirectionX=0<e?-1:e<0?1:0,this.movingDirectionY=0<s?-1:s<0?1:0;var h=this.x+e,a=this.y+s,l=!1,c=!1,p=!1,d=!1,u=this.options.bounce;!1!==u&&(l=void 0===u.top||u.top,c=void 0===u.bottom||u.bottom,p=void 0===u.left||u.left,d=void 0===u.right||u.right),(h>this.minScrollX||h<this.maxScrollX)&&(h=h>this.minScrollX&&p||h<this.maxScrollX&&d?this.x+e/3:h>this.minScrollX?this.minScrollX:this.maxScrollX),(a>this.minScrollY||a<this.maxScrollY)&&(a=a>this.minScrollY&&l||a<this.maxScrollY&&c?this.y+s/3:a>this.minScrollY?this.minScrollY:this.maxScrollY),this.moved||(this.moved=!0,this.trigger("scrollStart")),this._translate(h,a),r-this.startTime>this.options.momentumLimitTime&&(this.startTime=r,this.startX=this.x,this.startY=this.y,1===this.options.probeType&&this.trigger("scroll",{x:this.x,y:this.y})),1<this.options.probeType&&this.trigger("scroll",{x:this.x,y:this.y});var m=document.documentElement.scrollLeft||window.pageXOffset||document.body.scrollLeft,f=document.documentElement.scrollTop||window.pageYOffset||document.body.scrollTop,g=this.pointX-m,v=this.pointY-f;(g>document.documentElement.clientWidth-this.options.momentumLimitDistance||g<this.options.momentumLimitDistance||v<this.options.momentumLimitDistance||v>document.documentElement.clientHeight-this.options.momentumLimitDistance)&&this._end(t)}}},F.prototype._end=function(t){if(this.enabled&&!this.destroyed&&Y[t.type]===this.initiated){this.initiated=!1,this.options.preventDefault&&!M(t.target,this.options.preventDefaultException)&&t.preventDefault(),this.options.stopPropagation&&t.stopPropagation(),this.trigger("touchEnd",{x:this.x,y:this.y}),this.isInTransition=!1;var i=Math.round(this.x),e=Math.round(this.y),s=i-this.absStartX,o=e-this.absStartY;if(this.directionX=0<s?-1:s<0?1:0,this.directionY=0<o?-1:o<0?1:0,!this.options.pullDownRefresh||!this._checkPullDown())if(this._checkClick(t))this.trigger("scrollCancel");else if(!this.resetPosition(this.options.bounceTime,I.bounce)){this._translate(i,e),this.endTime=w();var n=this.endTime-this.startTime,r=Math.abs(i-this.startX),h=Math.abs(e-this.startY);if(this._events.flick&&n<this.options.flickLimitTime&&r<this.options.flickLimitDistance&&h<this.options.flickLimitDistance)this.trigger("flick");else{var a=0;if(this.options.momentum&&n<this.options.momentumLimitTime&&(h>this.options.momentumLimitDistance||r>this.options.momentumLimitDistance)){var l=!1,c=!1,p=!1,d=!1,u=this.options.bounce;!1!==u&&(l=void 0===u.top||u.top,c=void 0===u.bottom||u.bottom,p=void 0===u.left||u.left,d=void 0===u.right||u.right);var m=-1===this.directionX&&p||1===this.directionX&&d?this.wrapperWidth:0,f=-1===this.directionY&&l||1===this.directionY&&c?this.wrapperHeight:0,g=this.hasHorizontalScroll?H(this.x,this.startX,n,this.maxScrollX,this.minScrollX,m,this.options):{destination:i,duration:0},v=this.hasVerticalScroll?H(this.y,this.startY,n,this.maxScrollY,this.minScrollY,f,this.options):{destination:e,duration:0};i=g.destination,e=v.destination,a=Math.max(g.duration,v.duration),this.isInTransition=!0}else this.options.wheel&&(e=Math.round(e/this.itemHeight)*this.itemHeight,a=this.options.wheel.adjustTime||400);var y=I.swipe;if(this.options.snap){var x=this._nearestSnap(i,e);this.currentPage=x,a=this.options.snapSpeed||Math.max(Math.max(Math.min(Math.abs(i-x.x),1e3),Math.min(Math.abs(e-x.y),1e3)),300),i=x.x,e=x.y,this.directionX=0,this.directionY=0,y=this.options.snap.easing||I.bounce}if(i!==this.x||e!==this.y)return(i>this.minScrollX||i<this.maxScrollX||e>this.minScrollY||e<this.maxScrollY)&&(y=I.swipeBounce),void this.scrollTo(i,e,a,y);this.options.wheel&&(this.selectedIndex=Math.round(Math.abs(this.y/this.itemHeight))),this.trigger("scrollEnd",{x:this.x,y:this.y})}}}},F.prototype._checkClick=function(t){var i,e,s,o=this.stopFromTransition&&!this.pulling;if(this.stopFromTransition=!1,this.moved)return!1;if(this.options.wheel){if(this.target&&this.target.classList.contains(this.options.wheel.wheelWrapperClass)){var n=Math.abs(Math.round(this.y/this.itemHeight)),r=Math.round((this.pointY+f(this.wrapper).top-this.wrapperHeight/2)/this.itemHeight);this.target=this.items[n+r]}return this.scrollToElement(this.target,this.options.wheel.adjustTime||400,!0,!0,I.swipe),!0}if(o)return!1;var h=this.options.dblclick,a=!1;if(h&&this.lastClickTime){var l=h.delay,c=void 0===l?300:l;w()-this.lastClickTime<c&&(a=!0,P(t,"dblclick"))}return this.options.tap&&(i=t,e=this.options.tap,(s=document.createEvent("Event")).initEvent(e,!0,!0),s.pageX=i.pageX,s.pageY=i.pageY,i.target.dispatchEvent(s)),this.options.click&&!M(t.target,this.options.preventDefaultException)&&P(t),this.lastClickTime=a?null:w(),!0},F.prototype._resize=function(){var t=this;this.enabled&&(s&&(this.wrapper.scrollTop=0),clearTimeout(this.resizeTimeout),this.resizeTimeout=setTimeout(function(){t.refresh()},this.options.resizePolling))},F.prototype._startProbe=function(){W(this.probeTimer),this.probeTimer=z(function t(){var i=e.getComputedPosition();e.trigger("scroll",i),e.isInTransition?e.probeTimer=z(t):e.trigger("scrollEnd",i)});var e=this},F.prototype._transitionTime=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:0;if(this.scrollerStyle[_.transitionDuration]=t+"ms",this.options.wheel)for(var i=0;i<this.items.length;i++)this.items[i].style[_.transitionDuration]=t+"ms";if(this.indicators)for(var e=0;e<this.indicators.length;e++)this.indicators[e].transitionTime(t)},F.prototype._transitionTimingFunction=function(t){if(this.scrollerStyle[_.transitionTimingFunction]=t,this.options.wheel)for(var i=0;i<this.items.length;i++)this.items[i].style[_.transitionTimingFunction]=t;if(this.indicators)for(var e=0;e<this.indicators.length;e++)this.indicators[e].transitionTimingFunction(t)},F.prototype._transitionEnd=function(t){t.target===this.scroller&&this.isInTransition&&(this._transitionTime(),(!this.pulling||1===this.movingDirectionY)&&!this.resetPosition(this.options.bounceTime,I.bounce)&&(this.isInTransition=!1,3!==this.options.probeType&&this.trigger("scrollEnd",{x:this.x,y:this.y})))},F.prototype._translate=function(t,i,e){if(C(!c(t)&&!c(i),"Translate x or y is null or undefined."),c(e)&&(e=this.scale),this.options.useTransform?this.scrollerStyle[_.transform]="translate("+t+"px,"+i+"px) scale("+e+")"+this.translateZ:(t=Math.round(t),i=Math.round(i),this.scrollerStyle.left=t+"px",this.scrollerStyle.top=i+"px"),this.options.wheel)for(var s=this.options.wheel.rotate,o=void 0===s?25:s,n=0;n<this.items.length;n++){var r=o*(i/this.itemHeight+n);this.items[n].style[_.transform]="rotateX("+r+"deg)"}if(this.x=t,this.y=i,this.setScale(e),this.indicators)for(var h=0;h<this.indicators.length;h++)this.indicators[h].updatePosition()},F.prototype._animate=function(r,h,a,l){var c=this,p=this.x,d=this.y,u=this.lastScale,m=this.scale,f=w(),g=f+a;this.isAnimating=!0,W(this.animateTimer),function t(){var i=w();if(g<=i)return c.isAnimating=!1,c._translate(r,h,m),c.trigger("scroll",{x:c.x,y:c.y}),void(c.pulling||c.resetPosition(c.options.bounceTime)||c.trigger("scrollEnd",{x:c.x,y:c.y}));var e=l(i=(i-f)/a),s=(r-p)*e+p,o=(h-d)*e+d,n=(m-u)*e+u;c._translate(s,o,n),c.isAnimating&&(c.animateTimer=z(t)),3===c.options.probeType&&c.trigger("scroll",{x:c.x,y:c.y})}()},F.prototype.scrollBy=function(t,i){var e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:0,s=3<arguments.length&&void 0!==arguments[3]?arguments[3]:I.bounce;t=this.x+t,i=this.y+i,this.scrollTo(t,i,e,s)},F.prototype.scrollTo=function(t,i){var e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:0,s=3<arguments.length&&void 0!==arguments[3]?arguments[3]:I.bounce;(this.x!==t||this.y!==i)&&(this.isInTransition=this.options.useTransition&&0<e&&(t!==this.x||i!==this.y),!e||this.options.useTransition?(this._transitionTimingFunction(s.style),this._transitionTime(e),this._translate(t,i),e&&3===this.options.probeType&&this._startProbe(),e||(this.trigger("scroll",{x:t,y:i}),this._reflow=document.body.offsetHeight,this.resetPosition(this.options.bounceTime,I.bounce)||this.trigger("scrollEnd",{x:t,y:i})),this.options.wheel&&(i>this.minScrollY?this.selectedIndex=0:i<this.maxScrollY?this.selectedIndex=this.items.length-1:this.selectedIndex=Math.round(Math.abs(i/this.itemHeight)))):this._animate(t,i,e,s.fn))},F.prototype.scrollToElement=function(t,i,e,s,o){if(t&&(t=t.nodeType?t:this.scroller.querySelector(t),!this.options.wheel||t.classList.contains(this.options.wheel.wheelItemClass))){var n=m(t);n.left-=this.wrapperOffset.left,n.top-=this.wrapperOffset.top,!0===e&&(e=Math.round(t.offsetWidth/2-this.wrapper.offsetWidth/2)),!0===s&&(s=Math.round(t.offsetHeight/2-this.wrapper.offsetHeight/2)),n.left-=e||0,n.top-=s||0,n.left=n.left>this.minScrollX?this.minScrollX:n.left<this.maxScrollX?this.maxScrollX:n.left,n.top=n.top>this.minScrollY?this.minScrollY:n.top<this.maxScrollY?this.maxScrollY:n.top,this.options.wheel&&(n.top=Math.round(n.top/this.itemHeight)*this.itemHeight),this.scrollTo(n.left,n.top,i,o)}},F.prototype.resetPosition=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:0,i=1<arguments.length&&void 0!==arguments[1]?arguments[1]:I.bounce,e=this.x,s=Math.round(e);!this.hasHorizontalScroll||s>this.minScrollX?e=this.minScrollX:s<this.maxScrollX&&(e=this.maxScrollX);var o=this.y,n=Math.round(o);return!this.hasVerticalScroll||n>this.minScrollY?o=this.minScrollY:n<this.maxScrollY&&(o=this.maxScrollY),(e!==this.x||o!==this.y)&&(this.scrollTo(e,o,t,i),!0)},F.prototype.getComputedPosition=function(){var t=window.getComputedStyle(this.scroller,null),i=void 0,e=void 0;return e=this.options.useTransform?(i=+((t=t[_.transform].split(")")[0].split(", "))[12]||t[4]),+(t[13]||t[5])):(i=+t.left.replace(/[^-\d.]/g,""),+t.top.replace(/[^-\d.]/g,"")),{x:i,y:e}},F.prototype.stop=function(){if(this.options.useTransition&&this.isInTransition){this.isInTransition=!1,W(this.probeTimer);var t=this.getComputedPosition();this._translate(t.x,t.y),this.options.wheel?this.target=this.items[Math.round(-t.y/this.itemHeight)]:this.trigger("scrollEnd",{x:this.x,y:this.y}),this.stopFromTransition=!0}else!this.options.useTransition&&this.isAnimating&&(this.isAnimating=!1,W(this.animateTimer),this.trigger("scrollEnd",{x:this.x,y:this.y}),this.stopFromTransition=!0)},F.prototype.destroy=function(){this.destroyed=!0,this.trigger("destroy"),this.options.useTransition?W(this.probeTimer):W(this.animateTimer),this._removeDOMEvents(),this._events={}},(U=K).prototype.on=function(t,i){var e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:this;this._events[t]||(this._events[t]=[]),this._events[t].push([i,e])},U.prototype.once=function(t,i){var e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:this;function s(){this.off(t,s),i.apply(e,arguments)}s.fn=i,this.on(t,s)},U.prototype.off=function(t,i){var e=this._events[t];if(e)for(var s=e.length;s--;)(e[s][0]===i||e[s][0]&&e[s][0].fn===i)&&o(e,s)},U.prototype.trigger=function(t){var i=this._events[t];if(i)for(var e=i.length,s=[].concat(function(t){if(Array.isArray(t)){for(var i=0,e=Array(t.length);i<t.length;i++)e[i]=t[i];return e}return Array.from(t)}(i)),o=0;o<e;o++){var n=s[o],r=l(n,2),h=r[0],a=r[1];h&&h.apply(a,[].slice.call(arguments,1))}},(N=K).prototype._initSnap=function(){var m=this;this.currentPage={};var t,i,e,s,f=this.options.snap;if(f.loop){var o=this.scroller.children;1<o.length?(t=o[o.length-1].cloneNode(!0),(i=this.scroller).firstChild?(e=t,(s=i.firstChild).parentNode.insertBefore(e,s)):i.appendChild(t),this.scroller.appendChild(o[1].cloneNode(!0))):f.loop=!1}var g=f.el;"string"==typeof g&&(g=this.scroller.querySelectorAll(g)),this.on("refresh",function(){if(m.pages=[],m.wrapperWidth&&m.wrapperHeight&&m.scrollerWidth&&m.scrollerHeight){var t=f.stepX||m.wrapperWidth,i=f.stepY||m.wrapperHeight,e=0,s=void 0,o=void 0,n=void 0,r=0,h=void 0,a=0,l=void 0,c=void 0;if(g)for(h=g.length,l=-1;r<h;r++)c=X(g[r]),(0===r||c.left<=X(g[r-1]).left)&&(a=0,l++),m.pages[a]||(m.pages[a]=[]),e=Math.max(-c.left,m.maxScrollX),s=Math.max(-c.top,m.maxScrollY),o=e-Math.round(c.width/2),n=s-Math.round(c.height/2),m.pages[a][l]={x:e,y:s,width:c.width,height:c.height,cx:o,cy:n},e>m.maxScrollX&&a++;else for(o=Math.round(t/2),n=Math.round(i/2);e>-m.scrollerWidth;){for(m.pages[r]=[],s=h=0;s>-m.scrollerHeight;)m.pages[r][h]={x:Math.max(e,m.maxScrollX),y:Math.max(s,m.maxScrollY),width:t,height:i,cx:e-o,cy:s-n},s-=i,h++;e-=t,r++}m._checkSnapLoop();var p=f._loopX?1:0,d=f._loopY?1:0;m._goToPage(m.currentPage.pageX||p,m.currentPage.pageY||d,0);var u=f.threshold;m.snapThresholdY=u%1==0?m.snapThresholdX=u:(m.snapThresholdX=Math.round(m.pages[m.currentPage.pageX][m.currentPage.pageY].width*u),Math.round(m.pages[m.currentPage.pageX][m.currentPage.pageY].height*u))}}),this.on("scrollEnd",function(){f.loop&&(f._loopX?(0===m.currentPage.pageX&&m._goToPage(m.pages.length-2,m.currentPage.pageY,0),m.currentPage.pageX===m.pages.length-1&&m._goToPage(1,m.currentPage.pageY,0)):(0===m.currentPage.pageY&&m._goToPage(m.currentPage.pageX,m.pages[0].length-2,0),m.currentPage.pageY===m.pages[0].length-1&&m._goToPage(m.currentPage.pageX,1,0)))}),!1!==f.listenFlick&&this.on("flick",function(){var t=f.speed||Math.max(Math.max(Math.min(Math.abs(m.x-m.startX),1e3),Math.min(Math.abs(m.y-m.startY),1e3)),300);m._goToPage(m.currentPage.pageX+m.directionX,m.currentPage.pageY+m.directionY,t)}),this.on("destroy",function(){if(f.loop){var t=m.scroller.children;2<t.length&&(E(m.scroller,t[t.length-1]),E(m.scroller,t[0]))}})},N.prototype._checkSnapLoop=function(){var t=this.options.snap;t.loop&&this.pages&&this.pages.length&&(1<this.pages.length&&(t._loopX=!0),this.pages[0]&&1<this.pages[0].length&&(t._loopY=!0),t._loopX&&t._loopY&&A("Loop does not support two direction at the same time."))},N.prototype._nearestSnap=function(t,i){if(!this.pages.length)return{x:0,y:0,pageX:0,pageY:0};var e=0;if(Math.abs(t-this.absStartX)<=this.snapThresholdX&&Math.abs(i-this.absStartY)<=this.snapThresholdY)return this.currentPage;t>this.minScrollX?t=this.minScrollX:t<this.maxScrollX&&(t=this.maxScrollX),i>this.minScrollY?i=this.minScrollY:i<this.maxScrollY&&(i=this.maxScrollY);for(var s=this.pages.length;e<s;e++)if(t>=this.pages[e][0].cx){t=this.pages[e][0].x;break}s=this.pages[e].length;for(var o=0;o<s;o++)if(i>=this.pages[0][o].cy){i=this.pages[0][o].y;break}return e===this.currentPage.pageX&&((e+=this.directionX)<0?e=0:e>=this.pages.length&&(e=this.pages.length-1),t=this.pages[e][0].x),o===this.currentPage.pageY&&((o+=this.directionY)<0?o=0:o>=this.pages[0].length&&(o=this.pages[0].length-1),i=this.pages[0][o].y),{x:t,y:i,pageX:e,pageY:o}},N.prototype._goToPage=function(t){var i=1<arguments.length&&void 0!==arguments[1]?arguments[1]:0,e=arguments[2],s=arguments[3],o=this.options.snap;if(o&&this.pages&&this.pages.length&&(s=s||o.easing||I.bounce,t>=this.pages.length?t=this.pages.length-1:t<0&&(t=0),this.pages[t])){i>=this.pages[t].length?i=this.pages[t].length-1:i<0&&(i=0);var n=this.pages[t][i].x,r=this.pages[t][i].y;e=void 0===e?o.speed||Math.max(Math.max(Math.min(Math.abs(n-this.x),1e3),Math.min(Math.abs(r-this.y),1e3)),300):e,this.currentPage={x:n,y:r,pageX:t,pageY:i},this.scrollTo(n,r,e,s)}},N.prototype.goToPage=function(t,i,e,s){var o=this.options.snap;if(o&&this.pages&&this.pages.length){if(o.loop){var n=void 0;o._loopX?((n=this.pages.length-2)<=t?t=n-1:t<0&&(t=0),t+=1):((n=this.pages[0].length-2)<=i?i=n-1:i<0&&(i=0),i+=1)}this._goToPage(t,i,e,s)}},N.prototype.next=function(t,i){if(this.options.snap){var e=this.currentPage.pageX,s=this.currentPage.pageY;++e>=this.pages.length&&this.hasVerticalScroll&&(e=0,s++),this._goToPage(e,s,t,i)}},N.prototype.prev=function(t,i){if(this.options.snap){var e=this.currentPage.pageX,s=this.currentPage.pageY;--e<0&&this.hasVerticalScroll&&(e=0,s--),this._goToPage(e,s,t,i)}},N.prototype.getCurrentPage=function(){var t=this.options.snap;return t?t.loop?t._loopX?a({},this.currentPage,{pageX:this.currentPage.pageX-1}):a({},this.currentPage,{pageY:this.currentPage.pageY-1}):this.currentPage:null},(B=K).prototype.wheelTo=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:0;if(this.options.wheel){var i=-t*this.itemHeight;this.scrollTo(0,i)}},B.prototype.getSelectedIndex=function(){return this.options.wheel&&this.selectedIndex},B.prototype._initWheel=function(){var t=this.options.wheel;t.wheelWrapperClass||(t.wheelWrapperClass="wheel-scroll"),t.wheelItemClass||(t.wheelItemClass="wheel-item"),void 0===t.selectedIndex&&(t.selectedIndex=0,A("wheel option selectedIndex is required!"))},(q=K).prototype._initScrollbar=function(){var i=this,t=this.options.scrollbar,e=t.fade,s=void 0===e||e,o=t.interactive,n=void 0!==o&&o;this.indicators=[];var r=void 0;this.options.scrollX&&(r={el:O("horizontal"),direction:"horizontal",fade:s,interactive:n},this._insertScrollBar(r.el),this.indicators.push(new L(this,r))),this.options.scrollY&&(r={el:O("vertical"),direction:"vertical",fade:s,interactive:n},this._insertScrollBar(r.el),this.indicators.push(new L(this,r))),this.on("refresh",function(){for(var t=0;t<i.indicators.length;t++)i.indicators[t].refresh()}),s&&(this.on("scrollEnd",function(){for(var t=0;t<i.indicators.length;t++)i.indicators[t].fade()}),this.on("scrollCancel",function(){for(var t=0;t<i.indicators.length;t++)i.indicators[t].fade()}),this.on("scrollStart",function(){for(var t=0;t<i.indicators.length;t++)i.indicators[t].fade(!0)}),this.on("beforeScrollStart",function(){for(var t=0;t<i.indicators.length;t++)i.indicators[t].fade(!0,!0)})),this.on("destroy",function(){i._removeScrollBars()})},q.prototype._insertScrollBar=function(t){this.wrapper.appendChild(t)},q.prototype._removeScrollBars=function(){for(var t=0;t<this.indicators.length;t++)this.indicators[t].destroy()},(V=K).prototype._initPullDown=function(){this.options.probeType=3},V.prototype._checkPullDown=function(){var t=this.options.pullDownRefresh,i=t.threshold,e=void 0===i?90:i,s=t.stop,o=void 0===s?40:s;return!(-1!==this.directionY||this.y<e)&&(this.pulling||(this.pulling=!0,this.trigger("pullingDown")),this.scrollTo(this.x,o,this.options.bounceTime,I.bounce),this.pulling)},V.prototype.finishPullDown=function(){this.pulling=!1,this.resetPosition(this.options.bounceTime,I.bounce)},V.prototype.openPullDown=function(){var t=!(0<arguments.length&&void 0!==arguments[0])||arguments[0];this.options.pullDownRefresh=t,this._initPullDown()},V.prototype.closePullDown=function(){this.options.pullDownRefresh=!1},V.prototype.autoPullDownRefresh=function(){var t=this.options.pullDownRefresh,i=t.threshold,e=void 0===i?90:i,s=t.stop,o=void 0===s?40:s;this.pulling||(this.pulling=!0,this.scrollTo(this.x,e),this.trigger("pullingDown"),this.scrollTo(this.x,o,this.options.bounceTime,I.bounce))},(Z=K).prototype._initPullUp=function(){this.options.probeType=3,this.pullupWatching=!1,this._watchPullUp()},Z.prototype._watchPullUp=function(){this.pullupWatching||(this.pullupWatching=!0,this.on("scroll",this._checkToEnd))},Z.prototype._checkToEnd=function(t){var i=this,e=this.options.pullUpLoad.threshold,s=void 0===e?0:e;1===this.movingDirectionY&&t.y<=this.maxScrollY+s&&(this.once("scrollEnd",function(){i.pullupWatching=!1}),this.trigger("pullingUp"),this.off("scroll",this._checkToEnd))},Z.prototype.finishPullUp=function(){var t=this;this.pullupWatching?this.once("scrollEnd",function(){t._watchPullUp()}):this._watchPullUp()},Z.prototype.openPullUp=function(){var t=!(0<arguments.length&&void 0!==arguments[0])||arguments[0];this.options.pullUpLoad=t,this._initPullUp()},Z.prototype.closePullUp=function(){this.options.pullUpLoad=!1,this.pullupWatching&&(this.pullupWatching=!1,this.off("scroll",this._checkToEnd))},(j=K).prototype._initMouseWheel=function(){var t=this;this._handleMouseWheelEvent(p),this.on("destroy",function(){clearTimeout(t.mouseWheelTimer),clearTimeout(t.mouseWheelEndTimer),t._handleMouseWheelEvent(u)}),this.firstWheelOpreation=!0},j.prototype._handleMouseWheelEvent=function(t){t(this.wrapper,"wheel",this),t(this.wrapper,"mousewheel",this),t(this.wrapper,"DOMMouseScroll",this)},j.prototype._onMouseWheel=function(t){var i=this;if(this.enabled){t.preventDefault(),this.options.stopPropagation&&t.stopPropagation(),this.firstWheelOpreation&&this.trigger("scrollStart"),this.firstWheelOpreation=!1;var e=this.options.mouseWheel,s=e.speed,o=void 0===s?20:s,n=e.invert,r=void 0!==n&&n,h=e.easeTime,a=void 0===h?300:h;clearTimeout(this.mouseWheelTimer),this.mouseWheelTimer=setTimeout(function(){i.options.snap||a||i.trigger("scrollEnd",{x:i.x,y:i.y}),i.firstWheelOpreation=!0},400);var l=void 0,c=void 0;switch(!0){case"deltaX"in t:c=1===t.deltaMode?(l=-t.deltaX*o,-t.deltaY*o):(l=-t.deltaX,-t.deltaY);break;case"wheelDeltaX"in t:l=t.wheelDeltaX/120*o,c=t.wheelDeltaY/120*o;break;case"wheelDelta"in t:l=c=t.wheelDelta/120*o;break;case"detail"in t:l=c=-t.detail/3*o;break;default:return}var p=r?-1:1;l*=p,c*=p,this.hasVerticalScroll||(l=c,c=0);var d=void 0,u=void 0;if(this.options.snap)return d=this.currentPage.pageX,u=this.currentPage.pageY,0<l?d--:l<0&&d++,0<c?u--:c<0&&u++,void this._goToPage(d,u);d=this.x+Math.round(this.hasHorizontalScroll?l:0),u=this.y+Math.round(this.hasVerticalScroll?c:0),this.movingDirectionX=this.directionX=0<l?-1:l<0?1:0,this.movingDirectionY=this.directionY=0<c?-1:c<0?1:0,d>this.minScrollX?d=this.minScrollX:d<this.maxScrollX&&(d=this.maxScrollX),u>this.minScrollY?u=this.minScrollY:u<this.maxScrollY&&(u=this.maxScrollY);var m=this.y===u;this.scrollTo(d,u,a,I.swipe),this.trigger("scroll",{x:this.x,y:this.y}),clearTimeout(this.mouseWheelEndTimer),m&&(this.mouseWheelEndTimer=setTimeout(function(){i.trigger("scrollEnd",{x:i.x,y:i.y})},a))}},(G=K).prototype._initZoom=function(){var t=this.options.zoom,i=t.start,e=void 0===i?1:i,s=t.min,o=void 0===s?1:s,n=t.max,r=void 0===n?4:n;this.scale=Math.min(Math.max(e,o),r),this.setScale(this.scale),this.scrollerStyle[_.transformOrigin]="0 0"},G.prototype._zoomTo=function(t,i,e,s){this.scaled=!0;var o=t/(s||this.scale);this.setScale(t),this.refresh();var n=Math.round(this.startX-(i-this.relativeX)*(o-1)),r=Math.round(this.startY-(e-this.relativeY)*(o-1));n>this.minScrollX?n=this.minScrollX:n<this.maxScrollX&&(n=this.maxScrollX),r>this.minScrollY?r=this.minScrollY:r<this.maxScrollY&&(r=this.maxScrollY),this.x===n&&this.y===r||this.scrollTo(n,r,this.options.bounceTime),this.scaled=!1},G.prototype.zoomTo=function(t,i,e){var s=f(this.wrapper),o=s.left,n=s.top,r=i+o-this.x,h=e+n-this.y;this._zoomTo(t,r,h)},G.prototype._zoomStart=function(t){var i=t.touches[0],e=t.touches[1],s=Math.abs(i.pageX-e.pageX),o=Math.abs(i.pageY-e.pageY);this.startDistance=d(s,o),this.startScale=this.scale;var n=f(this.wrapper),r=n.left,h=n.top;this.originX=Math.abs(i.pageX+e.pageX)/2+r-this.x,this.originY=Math.abs(i.pageY+e.pageY)/2+h-this.y,this.trigger("zoomStart")},G.prototype._zoom=function(t){if(this.enabled&&!this.destroyed&&Y[t.type]===this.initiated){this.options.preventDefault&&t.preventDefault(),this.options.stopPropagation&&t.stopPropagation();var i=t.touches[0],e=t.touches[1],s=d(Math.abs(i.pageX-e.pageX),Math.abs(i.pageY-e.pageY))/this.startDistance*this.startScale;this.scaled=!0;var o=this.options.zoom,n=o.min,r=void 0===n?1:n,h=o.max,a=void 0===h?4:h;s<r?s=.5*r*Math.pow(2,s/r):a<s&&(s=2*a*Math.pow(.5,a/s));var l=s/this.startScale,c=this.startX-(this.originX-this.relativeX)*(l-1),p=this.startY-(this.originY-this.relativeY)*(l-1);this.setScale(s),this.scrollTo(c,p,0)}},G.prototype._zoomEnd=function(t){if(this.enabled&&!this.destroyed&&Y[t.type]===this.initiated){this.options.preventDefault&&t.preventDefault(),this.options.stopPropagation&&t.stopPropagation(),this.isInTransition=!1,this.isAnimating=!1,this.initiated=0;var i=this.options.zoom,e=i.min,s=void 0===e?1:e,o=i.max,n=void 0===o?4:o,r=this.scale>n?n:this.scale<s?s:this.scale;this._zoomTo(r,this.originX,this.originY,this.startScale),this.trigger("zoomEnd")}},K.prototype._initInfinite=function(){this.options.probeType=3,this.maxScrollY=-2e3,this.infiniteScroller=new J(this,this.options.infinity)},K.Version="1.14.1",K});