vue2 el-table行悬停时弹出提示信息el-popover
实现方法，用到了cell-mouse-enter、cell-mouse-leave两个事件，然后在表格的首列字段中，加个el-popover组件，当然你也可以选择在其他字段的位置来显示提示框，看自己的需求了。
示例代码：
<el-table @cell-mouse-enter="enter" @cell-mouse-leave="leave" :data="[{rowIndex:100, title:'行一', status: 1},{rowIndex:200, title:'行二', status: 0}]"><el-table-column label="序号" width="100"><template slot-scope="scope"><el-popover trigger="manual" placement="right" :ref="'popover'+(scope.row.rowIndex)"><div>弹出popover提示内容</div><div slot="reference">{{ scope.$index+1 }}</div></el-popover></template></el-table-column><el-table-column label="标题" prop="title"></el-table-column>
</el-table>enter (row, column, cell) {this.$refs['popover' + row.rowIndex].showPopper = true
},
leave (row, column, cell) {this.$refs['popover' + row.rowIndex].showPopper = false
}在enter方法中，还可以根据row行数据进行一些处理，比如根据状态status来判断是否弹出提示框。
enter (row, column, cell) {//当status等于0时弹出提示框if(row.status===0) {this.$refs['popover' + row.rowIndex].showPopper = true}
},
leave (row, column, cell) {this.$refs['popover' + row.rowIndex].showPopper = false
}