el-tooltip 提示样式修改，解决el-tooltip__popper设置宽度无效问题

<el-table-column label="描述" width="200" align="left" prop="description">
        <template v-slot="scope">
          <el-tooltip
            class="item ellipsis"
            effect="dark"
            placement="top"
            :content="scope.row.description"
            popper-class="tooltipLines"
          >
            <div>
              {{ scope.row.description }}
            </div>
          </el-tooltip>
        </template>
      </el-table-column>

<style scoped>
.ellipsis {
  white-space: wrap; /* 防止文本换行 */
  overflow: hidden; /* 隐藏超出的文本 */
  text-overflow: ellipsis; /* 显示省略号 */
  width: 180px; /* 设置元素宽度，根据需要调整 */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  text-align: justify;
}
</style>
<style lang="css">
.el-tooltip__popper {
  max-width: 40%;
}
</style>

https://blog.youkuaiyun.com/qq_51657072/article/details/124267624