his/openhis-ui-vue3/src/components/TopNav/index.vue

<template>
  <el-menu
    :default-active="activeMenu"
    mode="horizontal"
    :ellipsis="false"
    @select="handleSelect"
  >
    <template v-for="(item, index) in topMenus">
      <!-- 处理有子菜单的情况 -->
      <template v-if="item.children && item.children.length > 0 && index < visibleNumber">
        <el-sub-menu
          :key="index"
          :style="{'--theme': theme}"
          :index="item.path"
        >
          <template #title>
            <svg-icon
              v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
              :icon-class="item.meta.icon"
            />
            {{ item.meta.title }}
          </template>
          <template
            v-for="(child, childIndex) in item.children"
            :key="childIndex"
          >
            <el-menu-item :index="item.path + '/' + (child.path || '')">
              {{ child.meta.title }}
            </el-menu-item>
          </template>
        </el-sub-menu>
      </template>
      <!-- 处理无子菜单的情况 -->
      <template v-else-if="index < visibleNumber">
        <el-menu-item
          :key="index"
          :style="{'--theme': theme}"
          :index="item.path"
        >
          <svg-icon
            v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
            :icon-class="item.meta.icon"
          />
          {{ item.meta.title }}
        </el-menu-item>
      </template>
    </template>

    <!-- 顶部菜单超出数量折叠 -->
    <el-sub-menu
      v-if="topMenus.length > visibleNumber"
      :style="{'--theme': theme}"
      index="more"
    >
      <template #title>
        更多菜单
      </template>
      <template
        v-for="(item, index) in topMenus"
        :key="index"
      >
        <!-- 处理有子菜单的情况 -->
        <template v-if="item.children && item.children.length > 0 && index >= visibleNumber">
          <el-sub-menu :index="item.path">
            <template #title>
              <svg-icon
                v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
                :icon-class="item.meta.icon"
              />
              {{ item.meta.title }}
            </template>
            <template
              v-for="(child, childIndex) in item.children"
              :key="childIndex"
            >
              <el-menu-item :index="item.path + '/' + (child.path || '')">
                {{ child.meta.title }}
              </el-menu-item>
            </template>
          </el-sub-menu>
        </template>
        <!-- 处理无子菜单的情况 -->
        <template v-else-if="index >= visibleNumber">
          <el-menu-item :index="item.path">
            <svg-icon
              v-if="item.meta && item.meta.icon && item.meta.icon !== '#'"
              :icon-class="item.meta.icon"
            />
            {{ item.meta.title }}
          </el-menu-item>
        </template>
      </template>
    </el-sub-menu>
  </el-menu>
</template>

<script setup>
import {constantRoutes} from "@/router"
import {isHttp} from '@/utils/validate'
import useAppStore from '@/store/modules/app'
import useSettingsStore from '@/store/modules/settings'
import usePermissionStore from '@/store/modules/permission'

// 顶部栏初始数
const visibleNumber = ref(null);
// 当前激活菜单的 index
const currentIndex = ref(null);
// 隐藏侧边栏路由
const hideList = ['/index', '/user/profile'];

const appStore = useAppStore()
const settingsStore = useSettingsStore()
const permissionStore = usePermissionStore()
const route = useRoute();
const router = useRouter();

// 主题颜色
const theme = computed(() => settingsStore.theme);
// 所有的路由信息
const routers = computed(() => permissionStore.topbarRouters);

// 顶部显示菜单
const topMenus = computed(() => {
  let topMenus = [];
  routers.value.map((menu) => {
    if (menu.hidden !== true) {
      // 兼容顶部栏一级菜单内部跳转
      if (menu.path === "/") {
          topMenus.push(menu.children[0]);
      } else {
          topMenus.push(menu);
      }
    }
  })
  return topMenus;
})

// 设置子路由
const childrenMenus = computed(() => {
  let childrenMenus = [];
  routers.value.map((router) => {
    for (let item in router.children) {
      if (router.children[item].parentPath === undefined) {
        if(router.path === "/") {
          router.children[item].path = "/" + router.children[item].path;
        } else {
          if(!isHttp(router.children[item].path)) {
            router.children[item].path = router.path + "/" + router.children[item].path;
          }
        }
        router.children[item].parentPath = router.path;
      }
      childrenMenus.push(router.children[item]);
    }
  })
  return constantRoutes.concat(childrenMenus);
})

// 默认激活的菜单
const activeMenu = computed(() => {
  const path = route.path;
  let activePath = path;
  if (path !== undefined && path.lastIndexOf("/") > 0 && hideList.indexOf(path) === -1) {
    const tmpPath = path.substring(1, path.length);
    activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
    if (!route.meta.link) {
        appStore.toggleSideBarHide(false);
    }
  } else if(!route.children) {
    activePath = path;
    appStore.toggleSideBarHide(true);
  }
  
  // 检查当前路径是否是子菜单路径
  let isChildRoute = false;
  for (const item of routers.value) {
    if (item.children && item.children.length > 0) {
      const childRoute = item.children.find(child => (item.path + '/' + (child.path || '')) === path);
      if (childRoute) {
        isChildRoute = true;
        activePath = item.path; // 激活父菜单
        break;
      }
    }
  }
  
  activeRoutes(activePath);
  return activePath;
})

function setVisibleNumber() {
  const width = document.body.getBoundingClientRect().width / 3;
  visibleNumber.value = parseInt(width / 85);
}

function handleSelect(key, keyPath) {
  currentIndex.value = key;
  const route = routers.value.find(item => item.path === key);
  if (isHttp(key)) {
    // http(s):// 路径新窗口打开
    window.open(key, "_blank");
  } else {
    // 检查是否是子菜单路径
    let isChildRoute = false;
    let parentRoute = null;
    
    // 查找父路由
    for (const item of routers.value) {
      if (item.children && item.children.length > 0) {
        const childRoute = item.children.find(child => (item.path + '/' + (child.path || '')) === key);
        if (childRoute) {
          isChildRoute = true;
          parentRoute = item;
          break;
        }
      }
    }
    
    if (isChildRoute) {
      // 处理子菜单路径
      router.push({ path: key });
      appStore.toggleSideBarHide(true);
    } else if (!route || !route.children) {
      // 没有子路由路径内部打开
      const routeMenu = childrenMenus.value.find(item => item.path === key);
      if (routeMenu && routeMenu.query) {
        let query = JSON.parse(routeMenu.query);
        router.push({ path: key, query: query });
      } else {
        router.push({ path: key });
      }
      appStore.toggleSideBarHide(true);
    } else {
      // 显示左侧联动菜单
      activeRoutes(key);
      appStore.toggleSideBarHide(false);
    }
  }
}

function activeRoutes(key) {
  let routes = [];
  if (childrenMenus.value && childrenMenus.value.length > 0) {
    childrenMenus.value.map((item) => {
      if (key == item.parentPath || (key == "index" && "" == item.path)) {
        routes.push(item);
      }
    });
  }
  if(routes.length > 0) {
    permissionStore.setSidebarRouters(routes);
  } else {
    appStore.toggleSideBarHide(true);
  }
  return routes;
}

onMounted(() => {
  window.addEventListener('resize', setVisibleNumber)
})
onBeforeUnmount(() => {
  window.removeEventListener('resize', setVisibleNumber)
})

onMounted(() => {
  setVisibleNumber()
})
</script>

<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}

.topmenu-container.el-menu--horizontal > .el-menu-item.is-active, .el-menu--horizontal > .el-sub-menu.is-active .el-submenu__title {
  border-bottom: 2px solid #{'var(--theme)'} !important;
  color: #303133;
}

/* sub-menu item */
.topmenu-container.el-menu--horizontal > .el-sub-menu .el-sub-menu__title {
  float: left;
  height: 50px !important;
  line-height: 50px !important;
  color: #999093 !important;
  padding: 0 5px !important;
  margin: 0 10px !important;
}

/* 背景色隐藏 */
.topmenu-container.el-menu--horizontal>.el-menu-item:not(.is-disabled):focus, .topmenu-container.el-menu--horizontal>.el-menu-item:not(.is-disabled):hover, .topmenu-container.el-menu--horizontal>.el-submenu .el-submenu__title:hover {
  background-color: #ffffff !important;
}

/* 图标右间距 */
.topmenu-container .svg-icon {
  margin-right: 4px;
}

/* topmenu more arrow */
.topmenu-container .el-sub-menu .el-sub-menu__icon-arrow {
  position: static;
  vertical-align: middle;
  margin-left: 8px;
  margin-top: 0px;
}
</style>