给vue-admin-template菜单栏 sidebar-item 添加消息提示

<el-badge :value="200" :max="99" class="item">
  <el-button size="small">评论</el-button>
</el-badge>

<!-- 在 SidebarItem.vue 中 -->
<template>
  <div v-if="!item.hidden" class="menu-wrapper">
    <template v-if="hasOneShowingChild(item.children, item) && (!onlyOneChild.children || onlyOneChild.noShowingChildren) && !item.alwaysShow">
      <app-link v-if="onlyOneChild.meta" :to="resolvePath(onlyOneChild.path)">
        <el-menu-item :index="resolvePath(onlyOneChild.path)" :class="{'submenu-title-noDropdown':!isNest}">
          <svg-icon v-if="onlyOneChild.meta.icon" :icon-class="onlyOneChild.meta.icon"/>
          <span>{{ onlyOneChild.meta.title }}</span>
          <!-- 添加消息提示 -->
          <el-badge v-if="onlyOneChild.meta.messageCount" :value="onlyOneChild.meta.messageCount" class="mark"></el-badge>
        </el-menu-item>
      </app-link>
    </template>
    <!-- 其他模板代码 -->
  </div>
</template>


项目：反正是 <app-link> 下面
 <app-link v-else :to="resolvePath(child)" :key="child.name">
            <el-menu-item :index="resolveMenuCode(child)">
              <item
                v-if="child.meta"
                :icon="child.meta.icon"
                :title="child.meta.title"
              />
              <!-- 添加消息提示 --> <!-- 并且只有大模型菜单显示消息提示数量 -->
              <el-badge
                :value="10" 
                :max="99"
                class="mark"
                style="position: absolute; right: 75px"
                v-if="child.menuCode == 'LIVE-PLAY-BIGMODEL'"
              ></el-badge>
            </el-menu-item>
          </app-link>