vue 列表上下无缝滚动轮播

滚动从头到尾从上到下，最后首位相接，无限滚动

 // 判断是否滚动
    setTopGoBom() {
      let dom = this.$refs[this.bodyTableId];
      if (dom) {
        let allH = dom.offsetHeight;
        let chiDom = dom.firstElementChild;
        let chiLength = dom.children.length;
        let chiH = 0;
        let chiAllH = 0;
        if (chiDom) {
          chiH = chiDom.offsetHeight;
          chiAllH = chiH * chiLength;
          if (chiAllH > allH) {
            this.stateScorl(dom, chiDom);
          }
        }
      }
    },
    // 开始滚动
    stateScorl(dom, chiDom) {
      let _this = this;
      let timePop = 1;
      let offPop = this.resultNumRun;
      let chiLength = dom.children.length;
      let chiH = chiDom.offsetHeight;
      let allH = dom.offsetHeight;
      let chiAllH = chiH * chiLength;
      if (this.timeScorl) {
        clearInterval(this.timeScorl);
      }
      let resultH = 0;
      let chazhi = chiAllH - allH;
      this.timeScorl = setInterval(scorlRun, timePop);
      // 滚动方式
      function scorlRun() {
        if (chazhi > resultH) {
          resultH = resultH + offPop;
          if (resultH > chiH) {
            if (_this.timeScorl) {
              clearInterval(_this.timeScorl);
            }
            // 获取隐藏消失的dom
            let fistnode = dom.firstElementChild;
            // 删除dom
            dom.removeChild(fistnode);
            // 放到队尾
            dom.appendChild(fistnode);
            resultH = 0;
            if (this.timeScorl1) {
              clearTimeout(this.timeScorl1);
            }
            _this.timeScorl1 = setTimeout(function() {
              _this.timeScorl = setInterval(scorlRun, timePop);
            }, 1000);
          } else {
            setScrollTop(dom, resultH);
          }
        } else {
          if (this.timeScorl1) {
            clearTimeout(this.timeScorl1);
          }
          if (_this.timeScorl) {
            clearInterval(_this.timeScorl);
          }
        }
      }
      //设置窗口滚动条高度
      function setScrollTop(domIn, top) {
        if (!isNaN(top)) domIn.scrollTop = top;
      }
    },