lite-virtual-list/lib/lite-virtual-list.umd.min.js

a vue components support waterfall flow and have large data lists with high scrolling performance

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0===this.marginBottom?{height:t.height+this.unit}:{marginBottom:t.marginBottom+this.unit,height:t.height+this.unit}},handleWaterfallData:function(t){if(t.length){this.waterfallInfo.left.length&&(this.waterfallInfo.left[this.waterfallInfo.left.length-1].marginBottom=this.marginBottom),this.waterfallInfo.right.length&&(this.waterfallInfo.right[this.waterfallInfo.right.length-1].marginBottom=this.marginBottom);var e=this.waterfallGroup(t),r=e.left,i=e.right,n=[].concat(h(this.waterfallInfo.left),h(this.getWaterfallPosition(r,"left"))),a=[].concat(h(this.waterfallInfo.right),h(this.getWaterfallPosition(i,"right")));n[n.length-1].marginBottom=0,a[a.length-1].marginBottom=0,this.waterfallInfo={left:n,right:a},this.setWaterfallBarHeight()}},waterfallGroup:function(t){for(var e,r=[],i=[],n=0;e=t[n++];){e.marginBottom=this.marginBottom;var a=Number(e.height)+Number(e.marginBottom);this.leftHeight<=this.rightHieght?(this.leftHeight+=a,r.push(e)):(i.push(e),this.rightHieght+=a)}return{left:r,right:i}},setWaterfallBarHeight:function(){this.leftHeight>=this.rightHieght?this.$refs.scrollBar.style.height=this.leftHeight-this.marginBottom+this.unit:this.$refs.scrollBar.style.height=this.rightHieght-this.marginBottom+this.unit},getVisiblePosition:function(t){var e=this;if(!t.length)return[];var r=this.variableData?this.variableData.length:0,i=t.map((function(t,i){return{id:t.id,index:r+i,height:e.size,top:(r+i)*e.size,bottom:(r+i+1)*e.size}}));return i},getWaterfallPosition:function(t,e){if(!t.length)return[];for(var r=this.waterfallInfo[e],i=0;i<t.length;i++){t[i].index=r.length+i;var n=Number(t[i].height)+Number(this.marginBottom);0==i?r.length?(t[i].top=r[r.length-1].bottom,t[i].bottom=r[r.length-1].bottom+n):(t[i].top=0,t[i].bottom=n):(t[i].top=t[i-1].bottom,t[i].bottom=t[i-1].bottom+n)}return t},emitScrollEvent:function(){this.type===c.WATERFALL?this.$emit("scroll",{scrollTop:this.scrollTop,renderLeftScrollTop:this.scrollTop-this.leftOffset,renderRightScrollTop:this.scrollTop-this.rightOffset,renderLeftData:this.renderLeft,renderRightData:this.renderRight}):this.$emit("scroll",{scrollTop:this.scrollTop,renderScrollTop:this.scrollTop-this.offset,renderData:this.renderData})},handleScroll:function(){var t=this,e=this.scrollTop=this.$refs.virtualList.scrollTop;switch(this.type){case c.FIXED:this.start=Math.floor(e/this.size),this.end=this.start+this.remain,this.offset=this.start*this.size-this.prevCount*this.size;break;case c.VARIABLE:this.start=u(e,this.variableData),this.end=this.start+this.remain,this.offset=this.variableData[this.start-this.prevCount].top||0;break;case c.WATERFALL:this.leftStart=u(e,this.waterfallInfo.left),this.rightStart=u(e,this.waterfallInfo.right),this.leftEnd=this.leftStart+this.remain,this.rightEnd=this.rightStart+this.remain,this.leftOffset=this.waterfallInfo.left[this.leftStart-this.leftPrevCount].top||0,this.rightOffset=this.waterfallInfo.right[this.rightStart-this.rightPrevCount].top||0;break}this.$nextTick((function(){t.emitScrollEvent(),e+t.$refs.virtualList.clientHeight>=t.$refs.virtualList.scrollHeight-t.distance&&t.$emit("loadMore")}))}}},x=S;r("4636");function D(t,e,r,i,n,a,o,s){var l,f="function"===typeof t?t.options:t;if(e&&(f.render=e,f.staticRenderFns=r,f._compiled=!0),i&&(f.functional=!0),a&&(f._scopeId="data-v-"+a),o?(l=function(t){t=t||this.$vnode&&this.$vnode.ssrContext||this.parent&&this.parent.$vnode&&this.parent.$vnode.ssrContext,t||"undefined"===typeof 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