elementui table表格使用fixed固定表格后，页面放大缩小，表格错位问题。

// 计算页面放大缩小表格高度计算有误问题
    window.onresize = () => {
      setTimeout(() => {
        const tableList = this.$refs.tableList;
        const tableHeader = tableList.querySelector('.el-table__header-wrapper');
        const fixedBodyWrapper = tableList.querySelectorAll('.el-table__fixed-body-wrapper');
        const {offsetHeight} = tableHeader;

        fixedBodyWrapper.forEach(element => {
          element.style.top = offsetHeight + 'px';
        });
      }, 0);
    };