vue

1.登录之后存储权限到store
2.layout/components/Sidebar/SiderItem.vue

<template>
    <div v-if="!item.hidden">
        <template v-if="hasOneShowingChild(item.children, item) && (!onlyOneChild.children || onlyOneChild.noShowingChildren) && !item.alwaysShow">
            <app-link v-if="onlyOneChild.meta && power[item.meta.power]" :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-if="power[item.meta.power]" 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>
            <template v-for="child in item.children">
                <sidebar-item v-if="power[child.meta.power]" :key="child.path" :is-nest="true" :item="child" :base-path="resolvePath(child.path)" class="nest-menu" />
            </template>
            <!-- <sidebar-item  v-for="child in item.children" :key="child.path" :is-nest="true" :item="child" :base-path="resolvePath(child.path)" class="nest-menu" /> -->
        </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 { mapGetters } from 'vuex';
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: '',
        },
    },
    data() {
        // To fix https://github.com/PanJiaChen/vue-admin-template/issues/237
        // TODO: refactor with render function
        this.onlyOneChild = null;
        return {};
    },
    computed: {
        ...mapGetters(['power']),
    },
    methods: {
        hasOneShowingChild(children = [], parent) {
            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;
                    return true;
                }
            });

            // 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;
            }
            return path.resolve(this.basePath, routePath);
        },
    },
};
</script>

{
    path: "/dashboard",
    component: Layout,
    redirect: "/dashboard",
    meta: { title: "首页", icon: "dashboard", power: "index" }
    children: [
      {
        path: "/dashboard",
        name: "Dashboard",
        component: () => import("@/views/dashboard/index"),
        meta: { title: "首页", icon: "dashboard", power: "index" }
      }
    ]
  },