vue 无限滚动
window.addEventListener('scroll',this.listscroll)
listscroll(){
var contantheight=document.body.scrollHeight //正文高度
var scrollheight=window.screen.availHeight+document.documentElement.scrollTop || document.body.scrollTop //可视工作区域加滚动卷去的高度
if(scrollheight>=contantheight){
var addlist=this.list
for(let i=0;i<=5;i++){
this.list.push(addlist[i])
}
}
},