the exception that vue better-scroll rolls to the bottom when a new message is loaded.
let disY=60; scrolls normally
let disY= el [el.length-1] .clientHeight; this makes scrolling unusual. See the picture below for details.
RequestAxios(comment,function(){
//
_this._intervalLoad(function(){
_this.$nextTick(()=>{
let el=_this.$refs.recordWrap.childNodes;
//let disY=60;
//
let disY=el[el.length-1].clientHeight;
if(el){
_this.chatScroll.scrollBy(0, _this.lastScrollY-disY,500);
setTimeout(()=>{
_this.lastScrollY= _this.chatScroll.y;
},50);
}
});
});
});
}, 
