使用vue3.2实现多页签导航

// src/store/tag-list.js
import { defineStore } from "pinia";

export const useTagStore = defineStore('tag',{
    state: ()=> ({
        tagList: [
            // 初始化默认展示【首页】标签导航
            {
                path:'/index',
                name: 'index',
                meta: { title: '首页'}
            }
        ]
    }),
    getters: {
        tagListGetter: state=> state.tagList
    },
    actions: {
        addTag(item) {
            this.tagList.push(item)
        },
        delTag(item) {
            // 找出要删除的tag的索引值
            const i = this.tagList.findIndex(v => v.path === item.path)
            this.tagList.splice(i,1)
        }
    },
    // 持久化
    persist: {
        enabled: true, // 开启
        strategies: [
            {
                key: 'tagList',
                storage: sessionStorage
            }
        ]

    }

    <!-- 无子级 -->
    <el-menu-item :index="item.path" v-if="!item.children" @click="addTag(item)">
        <el-icon><Menu /></el-icon>
        <span>{{item.meta.title}}</span>
    </el-menu-item>
    <!-- 有子级 -->
    <el-sub-menu :index="item.path" v-else>
        <template #title>{{item.meta.title}}</template>
        <nav-item v-for="sub in item.children" :key="sub.path" :item="sub"></nav-item>
    </el-sub-menu>

import { storeToRefs } from 'pinia'
import { useTagStore } from '@/store/tag-list.js'
const tagStore = useTagStore()
const { tagList } = storeToRefs(tagStore)

const { item } = defineProps({
    item: {
        type: Object
    }
})

// 点击路由，添加标签导航，注意去重
const addTag = (item) => {
    // 添加前判断是否已存在
    const isRepeat = tagList.value.some(v => v.path === item.path) // 找到则返回true，否则返回false
    if(isRepeat) return
    // 限制最多只能打开10个标签导航页
    if(tagList.value.length === 10) {
        // 自动把第二个删除
        tagStore.delTag(tagList.value[1])
    }
    // 添加
    tagStore.addTag(item)
}

    <div class="tags">
        <el-scrollbar class="scroll-container">
            <el-tag
                v-for="(tag,index) in tagList"
                :key="tag.path"
                class="mx-1"
                :closable="tag.path !== '/index'"
                :type="tag.path === defaultUrl? '' : 'info'"
                @click="handleJump(tag)"
                @close="handleClose(tag,index)"
            >
                {{ tag?.meta?.title }}
            </el-tag>
        </el-scrollbar>
    </div>

import { ref,watch } from 'vue'
import { useRoute, useRouter } from 'vue-router'
import { storeToRefs } from 'pinia'
import { useTagStore } from '@/store/tag-list.js'

const route = useRoute()
const router = useRouter()
const tagStore =  useTagStore()
const { tagList } = storeToRefs(tagStore)

// 高亮当前路由导航的标签页
const defaultUrl = ref('/idnex')
watch(route,(newVal,oldVal) => {
    defaultUrl.value = newVal.path

},{deep: true,immediate: true})

// 跳转路由
const handleJump = (tag) => {
    // 重复点击标签，不跳转
    if(route.path === tag.path) return
    router.push(tag.path)
}

// 关闭标签
const handleClose = (tag, i) => {
    // store 删除
    tagStore.delTag(tag)
    // 1.删除非当前模块，正常删除
    if(route.path !== tag.path) return
    // 2.删除当前模块
    if(i === tagList.value.length) {
        // 2.1当前模块属于最后一个模块，删除后需要高亮前一个模块
        handleJump(tagList.value[i-1])
    }else {
        // 2.2当前模块属于中间模块模块，删除后需要高亮后一个模块
        handleJump(tagList.value[i])
    }
}