ruoyi

src/components/TopNav/index.vue

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+<template>
+  <el-menu
+    :default-active="activeMenu"
+    mode="horizontal"
+    @select="handleSelect"
+  >
+    <template v-for="(item, index) in topMenus">
+      <el-menu-item :style="{'--theme': theme}" :index="item.path" :key="index" v-if="index < visibleNumber"
+        ><svg-icon :icon-class="item.meta.icon" />
+        {{ item.meta.title }}</el-menu-item
+      >
+    </template>
+
+    <!-- 顶部菜单超出数量折叠 -->
+    <el-sub-menu :style="{'--theme': theme}" index="more" v-if="topMenus.length > visibleNumber">
+      <template #title>更多菜单</template>
+      <template v-for="(item, index) in topMenus">
+        <el-menu-item
+          :index="item.path"
+          :key="index"
+          v-if="index >= visibleNumber"
+          ><svg-icon :icon-class="item.meta.icon" />
+          {{ item.meta.title }}</el-menu-item
+        >
+      </template>
+    </el-sub-menu>
+  </el-menu>
+</template>
+
+<script setup>
+import { constantRoutes } from "@/router"
+import { isHttp } from '@/utils/validate'
+
+// 顶部栏初始数
+const visibleNumber = ref(null);
+// 是否为首次加载
+const isFrist = ref(null);
+// 当前激活菜单的 index
+const currentIndex = ref(null);
+
+const store = useStore();
+const route = useRoute();
+
+// 主题颜色
+const theme = computed(() => store.state.settings.theme);
+// 所有的路由信息
+const routers = computed(() => store.state.permission.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 = "/redirect/" + 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 = defaultRouter.value;
+  if (path !== undefined && path.lastIndexOf("/") > 0) {
+    const tmpPath = path.substring(1, path.length);
+    activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
+  } else if ("/index" == path || "" == path) {
+    if (!isFrist.value) {
+      isFrist.value = true;
+    } else {
+      activePath = "index";
+    }
+  }
+  let routes = activeRoutes(activePath);
+  if (routes.length === 0) {
+    activePath = currentIndex.value || defaultRouter.value
+    activeRoutes(activePath);
+  }
+  return activePath;
+})
+// 默认激活的路由
+const defaultRouter = computed(() => {
+  let router;
+  Object.keys(routers.value).some((key) => {
+    if (!routers.value[key].hidden) {
+      router = routers.value[key].path;
+      return true;
+    }
+  });
+  return router;
+})
+function setVisibleNumber() {
+  const width = document.body.getBoundingClientRect().width / 3;
+  visibleNumber.value = parseInt(width / 85);
+}
+function handleSelect(key, keyPath) {
+  currentIndex.value = key;
+  if (isHttp(key)) {
+    // http(s):// 路径新窗口打开
+    window.open(key, "_blank");
+  } else if (key.indexOf("/redirect") !== -1) {
+    // /redirect 路径内部打开
+    router.push({ path: key.replace("/redirect", "") });
+  } else {
+    // 显示左侧联动菜单
+    activeRoutes(key);
+  }
+}
+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) {
+    store.commit("SET_SIDEBAR_ROUTERS", routes);
+  }
+  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-submenu__title {
+  float: left;
+  height: 50px !important;
+  line-height: 50px !important;
+  color: #999093 !important;
+  padding: 0 5px !important;
+  margin: 0 10px !important;
+}
+</style>