element-ui 点击行如何获取table的行索引

文档中有一个tableRowClassName方法，可以获取到当前行的index，

tableRowClassName ({row, rowIndex}) {
      //把每一行的索引放进row
      row.index = rowIndex;
    }　

例子：

表头：

<el-table :data="list" v-loading.body="listLoading" element-loading-text="Loading..."  border fit
                  :row-class-name="tableRowClassName" 3 @row-click = "onRowClick"
                  highlight-current-row style="width: 100%">
                <el-table-column align="center" prop="passtime" label="Time" width="180">

js:

tableRowClassName ({row, rowIndex}) {
      //把每一行的索引放进row
      row.index = rowIndex;  4     },
    onRowClick (row, event, column) {
      //行点击消除new标记
      var index = row.index;  8       var deleteIndex = Array.indexOf(this.showIndexArr, index);
      if (deleteIndex != -1) {
        this.showIndexArr.splice(deleteIndex,1);  
      }
    }

以上。

参考：https://segmentfault.com/q/1010000007849369