vue3路由缓存（点击菜单栏标签实现切换页面）

环境搭建 参考 vite+vue3环境搭建

其次ui框架用了antdV(感觉比element更专业啊)
上面的都安装好了后就可以开始了

0.配置路由文件

image.png

1.创建pinia缓存文件

import { defineStore } from 'pinia'

export const useMenuStore = defineStore({
  id: 'menu',
  state: () => {
    return {
      openMenu: [],
      menuIdx: 0,
      menuRoute: []
    }
  },
  getters: {},
  actions: {},
  // 开启数据缓存
  persist: {
    enabled: true,
    strategies: [{
      key: 'my_project',
      storage: sessionStorage,
    }]
  }
})

2.路由入口

<script setup>
import { useMenuStore } from '@/stores/menu';
import { storeToRefs } from "pinia"

const menuStore = useMenuStore()
const { openMenu } = storeToRefs(menuStore) 
</script>
 <router-view v-slot="{ Component, route }">
            <keep-alive :include="openMenu">
              <component v-if="route.meta.keepAlive" :is="Component" :key="route.name" />
            </keep-alive>
            <component v-if="!route.meta.keepAlive" :is="Component" :key="route.name" />
          </router-view>

3.简单的写个菜单样式

image.png
image.png

抽出成独立的组件

<template>
  <div style="position: relative;border-radius: 5px;background-color: #fff;overflow: hidden;" :style="`${isScrollBtn ? 'padding: 0 20px 0 27px;' : 'padding: 0 37px 0 10px;'}`">
    <div class="leftBtn" @click="handleLeft" v-show="isScrollBtn"><DoubleLeftOutlined /></div>
    <div class="menu-tag" ref="tagBox" @scroll="menuScroll">
  
      <a-tag :closable="v != 'Index'"  v-for="(v, index) in openMenu" :bordered="false" :color="`${index == menuIdx ? '#108ee9' : 'blue'}`" @click="handleTag(v)" @close.prevent="handleClose(v, index)">{{v}}</a-tag>

    </div>
    <div class="rightBtn" @click="handleRight" v-show="isScrollBtn"><DoubleRightOutlined /></div>
  </div>
</template>

<script setup>
  import { DoubleRightOutlined, DoubleLeftOutlined } from '@ant-design/icons-vue';
  import { ref, nextTick, watch } from 'vue'
  import { useMenuStore } from '@/stores/menu';
  import { storeToRefs } from "pinia"
  import { useRouter, useRoute } from "vue-router"
  const route = new useRoute()
  const router = new useRouter()
  const menuStore = useMenuStore()
  const { menuIdx, openMenu, menuRoute } = storeToRefs(menuStore) 
  const tagBox = ref(null)

  const isScrollBtn = ref(false)
  let offsetWidth = 0
  let scrollWidth = 0
  let scrollLeft = 0
  let isScroll = false // 是否在滚动
  let scrollLenth = 300 //滚动距离

  watch(() => route.name, async (now) => {
    let Idx = openMenu.value.indexOf(now)
    if(Idx == -1) {
      openMenu.value.push(now)
      menuRoute.value.push(route.path)
      menuIdx.value = openMenu.value.length - 1
      await nextTick()
      isBeyond()
    } else {
      menuIdx.value = Idx
    }
  }, {immediate: true})
  /** 监听容器盒子滚动事件 */
  let scrollTimer;
  const menuScroll = () => {
    isScroll = true
    if(scrollTimer) clearTimeout(scrollTimer);
    scrollTimer = setTimeout(() => {
      getOpton()
      isScroll = false
    }, 300);
  }
  /** 获取菜单容器宽度等信息 */
  const getOpton = () => {
    offsetWidth = tagBox.value.offsetWidth
    scrollWidth = tagBox.value.scrollWidth
    scrollLeft = tagBox.value.scrollLeft
  }
  /** 计算宽度是否超出容器宽度 */
  const isBeyond =  () => {
    getOpton()
    if(scrollWidth > offsetWidth) {
      isScrollBtn.value = true
      tagBox.value.scrollTo(scrollWidth - offsetWidth + 47, 0)
    } else {
      isScrollBtn.value = false
    }
  }
  const handleLeft = () => {
    if(isScroll) return
    tagBox.value.scrollTo(scrollLeft - scrollLenth, 0)
  }
  const handleRight = () => {
    if(isScroll) return
    tagBox.value.scrollTo(scrollLeft + scrollLenth, 0)
  }
  // 点击菜单
  const handleTag = (name) => {
    let Idx = openMenu.value.indexOf(name)
    menuIdx.value = Idx
    router.push(menuRoute.value[Idx])
  }
  // 关闭菜单
  const handleClose = async (name,index) => {
    
    // 删除的是高亮菜单
    if(index == menuIdx.value) {
      menuIdx.value -= 1
      router.push(menuRoute.value[index - 1])
    }
    openMenu.value.splice(index, 1)
    menuRoute.value.splice(index, 1)
    await nextTick()
    isBeyond()
  }
</script>
<style lang='less' scoped>  
  :deep(.menu-tag) {
    cursor: pointer;
    user-select: none;
  }
  .leftBtn,.rightBtn {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #fff2f0;
    position: absolute;
    top: 0;
    
    bottom: 0;
    background-color: rgb(60 60 60 / 88%);
    width: 20px;
    z-index: 1;
    box-shadow: #fff inset 0 0px 17px;
    cursor: pointer;
    &:hover {
      color: #d8d5d5;
      background-color: #999696;
    }
  }
  .leftBtn {
    left: 0;
  }
  .rightBtn {
    right: 0;
  }
  .menu-tag {
    // width: 1000px;
    height: 40px;
    
    box-sizing: border-box;
    // margin: 10px 16px;
    
    display: flex;
    align-items: center;
    overflow: hidden;
    justify-content: flex-start;
    &>* {
      flex-shrink: 0;
    }
    
  }
</style>

最后路由缓存需要页面申明name
使用steup语法糖 可以安装插件 vite-plugin-vue-setup-extend
vite.config.js内配置

image.png

就可以直接

<script steup name="aaaa">