elementUI表格设置单元格文字hover样式

      <el-table-column label="核心使用场景" min-width='300'>
        <template scope="scope">
          <el-tooltip effect="dark" placement="top">
            <div v-html="scope.row.useScene" slot="content" style="{'220px';white-space:pre-line;word-break:break-all;}"></div>
            <div class="oneLine">{{scope.row.useScene}}</div>
          </el-tooltip>
        </template>
      </el-table-column>

    async getList() {
      let res = await getList(this.listQuery)
      if (res.code === 200) {
        let { list, recordcount } = res.data
        list.forEach((item) => {
          item.updatetime = parseTime(
            Number(item.updatetime + '000'),
            '{y}-{m}-{d} {h}:{i}:{s}'
          )
          item.useScene = item.casescenelist
            .map((item) => `${item.typename}：${item.content}

`)
            .join('')
            .slice(0, -2)
        })
        this.tableData = list
        this.total = recordcount
      }
    },

    .oneLine {
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
    }