el-table实现单选

handleSelectionChange(v) {
      this.multipleSelection = v;
      if (v.length > 1) {
        var newRows = v.filter((it, index) => {
          if (index == v.length - 1) {
            this.$refs.table.toggleRowSelection(it, true);
            return true;
          } else {
            this.$refs.table.toggleRowSelection(it, false);
            return false;
          }
        });
        this.multipleSelection = newRows;
      }
    },

// 禁用掉全选
/deep/ thead .el-table-column--selection .cell{
  display: none;
}