vue 中 table序号列翻页累加

<el-table-column type="index" align="center" :index='indexMethod' label="序号" />

indexMethod(index) {
    let curpage = this.page; //当前页码
    let limitpage = this.size; //每页条数
    return (index + 1) + (curpage - 1) * limitpage;
}