业务场景：当前步骤条鼠标悬浮提示框，步骤条是for循环出来的

如下图:

  <el-steps finish-status="success">
        <el-popover
          v-for="item in uniqueReverseArr"
          placement="top-start"
          :title="item.title"
          :width="250"
          trigger="hover"
        >
          <template #reference>
            <el-step
              :status="
                item.status == '2'
                  ? 'success'
                  : item.status == '3'
                  ? 'error'
                  : item.status == '1'
                  ? 'finish'
                  : 'process'
              "
              @click.native="stepClick(item)"
            >
              <template v-slot:title>
                <span>{{ item.title }}</span>
              </template>
            </el-step>
          </template>
          <div>
            <span class="popoverSpan">traceid:</span>
            {{ item.currentTraceId }}
          </div>
          <div>
            <span class="popoverSpan">time:</span>
            {{ parseTime(item.executionTime) }}
          </div>
        </el-popover>
      </el-steps>