dy-admin-manager/src/layout/components/Sidebar/SidebarItem.vue

<template>
  <div v-if="!item.hidden" v-show="menuIsShow(item)" class="menu-wrapper">
    <!--  &&
        !item.alwaysShow  && (!onlyOneChild.children|| onlyOneChild.children.length<=1 || onlyOneChild.noShowingChildren)-->
    <template
      v-if="
        hasOneShowingChild(item.children, item)
      "
    >
      <app-link v-if="onlyOneChild.meta" :to="resolvePath(onlyOneChild.path)">
        <el-menu-item
          :index="resolvePath(onlyOneChild.path)"
          :class="{ 'submenu-title-noDropdown': !isNest }"
        >
          <item
            :icon="onlyOneChild.meta.icon || (item.meta && item.meta.icon)"
            :title="onlyOneChild.meta.title"
          />
        </el-menu-item>
      </app-link>
    </template>

    <el-submenu
      v-else
      class="submenu"
      ref="subMenu"
      :index="resolvePath(item.path)"
      popper-append-to-body
    >
      <template slot="title">
        <item
          v-if="item.meta"
          :icon="item.meta && item.meta.icon"
          :title="item.meta.title"
        />
      </template>
      <sidebar-item
        v-for="child in item.children"
        :key="child.id"
        :is-nest="true"
        :item="child"
        :base-path="resolvePath(child.path)"
        class="nest-menu itemIcon"
      />
    </el-submenu>
  </div>
</template>

<script>
import path from "path";
import { isExternal } from "@/utils/validate";
import Item from "./Item";
import AppLink from "./Link";
import FixiOSBug from "./FixiOSBug";
import { getBelongTopMenuPath } from '@/utils/permission';
export default {
  name: "SidebarItem",
  components: { Item, AppLink },
  mixins: [FixiOSBug],
  props: {
    // route object
    item: {
      type: Object,
      required: true,
    },
    isNest: {
      type: Boolean,
      default: false,
    },
    basePath: {
      type: String,
      default: "",
    },
    activeTopMenu: {
          type: String,
          default: ''
      }
  },
  data() {
    // To fix https://github.com/PanJiaChen/vue-admin-template/issues/237
    // TODO: refactor with render function

    return {};
  },
  mounted() {
    this.onlyOneChild = null;
  },
  computed: {
    getActiveTopMenu: function () {
      if (this.activeTopMenu !== '') {
          return this.activeTopMenu;
      }
      const route = this.$route;
      /*
      const { meta, path } = route;
      if (meta.belongTopMenu) {
          return meta.belongTopMenu;
      }
      return '/' + path.split('/')[1];
      */
      return getBelongTopMenuPath(route);
    },
  },
  methods: {
    menuIsShow(route) {
        let activeTopMenu = this.basePath;
        const { meta } = route;
        if (meta.belongTopMenu) {
            activeTopMenu = meta.belongTopMenu;
        }
        //
        //  (activeTopMenu, this.getActiveTopMenu)
        return activeTopMenu === this.getActiveTopMenu;
    },
    hasOneShowingChild(children = [], parent) {
      let count = 0
      const showingChildren = children.filter((item) => {
        if (item.hidden) {
          return false;
        } else  {
          // Temp set(will be used if only has one showing child)
          this.onlyOneChild = item;
          count++
          return true;
        }
      });
      //  ('是否又多个子集',showingChildren)
      // When there is only one child router, the child router is displayed by default

      if (showingChildren.length === 1) {
        return true;
      }

      // Show parent if there are no child router to display
      if (showingChildren.length === 0) {
        this.onlyOneChild = { ...parent, path: "", noShowingChildren: true };
        return true;
      }

      return false;
    },
    resolvePath(routePath) {
      if (isExternal(routePath)) {
        return routePath;
      }
      if (isExternal(this.basePath)) {
        return this.basePath;
      }
      // debugger
      return path.resolve(this.basePath, routePath);
    },
  },
};
</script>
<style lang="scss" scoped>
// 取消双击选中文字
div {
  -moz-user-select: none; /*火狐*/
  -webkit-user-select: none; /*webkit浏览器*/
  -ms-user-select: none; /*IE10*/
  -khtml-user-select: none; /*早期浏览器*/
  user-select: none;
}
.itemIcon {
  display: flex;
  flex-direction: row;
  align-items: center;
}

</style>