The problem of v-cloak realizing the display of the number of unread messages

flicker occurs when refreshing or loading the page. Use v-cloak to solve the problem. When the unread message is 0, the page will not flicker, but when the unread message is not 0, it will not be displayed. Is there any good way to solve the problem that the page does not flash when there is no unread message, and the unread message does not display normally when it is 0?

<div class="showIf" v-if="temp.unReadMessageNum != "" || temp.unReadMessageNum != 0" v-cloak>
   <span class="num">{{temp.unReadMessageNum}}</span>
</div>
.showIf {
        display: inline-block;
        float: right;
        height: size(20);
        width: size(20);
        background-color: -sharpF64D32;
        margin-right: size(5);
        margin-top: size(13);
        border-radius: 50%;

        [v-cloak] {
          display: none;
        }

        .num {
          font-size: size(14);
          line-height: size(16);
          color: -sharpffffff;
          text-align: center;
        }
      }
Mar.16,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c2bb70-33a84.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c2bb70-33a84.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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