分享一个极致舒适的Vue页面保活方案

<template>
  <RouterView v-slot="{ Component }">
    <KeepAlive>
      <component :is="Component"/>
    </KeepAlive>
  </RouterView>
</template>

import useRoutersStore from '@/store/routers';

const routes: RouteRecordRaw[] = [
  {
    path: '/',
    name: 'index',
    component: () => import('@/layout/index.vue'),
    children: [
      {
        path: '/app',
        name: 'App',
        component: () => import('@/views/app/index.vue'),
      },
      {
        path: '/data-list',
        name: 'DataList',
        component: () => import('@/views/data-list/index.vue'),
        meta: {
          // 离开【/data-list】前往【/data-detail】时缓存【/data-list】
          leaveCaches: ['/data-detail'],
        }
      },
      {
        path: '/data-detail',
        name: 'DataDetail',
        component: () => import('@/views/data-detail/index.vue'),
      }
    ]
  }
];

router.beforeEach((to: RouteLocationNormalized, from: RouteLocationNormalized, next: NavigationGuardNext) => {
  const { cacheRouter } = useRoutersStore();
  cacheRouter(from, to);
  next();
});

import { RouteLocationNormalized } from 'vue-router';

const useRouterStore = defineStore('router', {
  state: () => ({
    cacheComps: new Set<string>(),
  }),
  actions: {
    cacheRouter(from: RouteLocationNormalized, to: RouteLocationNormalized) {
      if(
        Array.isArray(from.meta.leaveCaches) && 
        from.meta.leaveCaches.inclued(to.path) && 
        typeof from.name === 'string'
      ) {
        this.cacheComps.add(form.name);
      }
      if(
        Array.isArray(to.meta.leaveCaches) && 
        !to.meta.leaveCaches.inclued(from.path) && 
        typeof to.name === 'string'
      ) {
        this.cacheComps.delete(to.name);
      }
    },
  },
  getters: {
    keepAliveComps(state: State) {
      return [...state.cacheComps];
    },
  },
});

<template>
  <RouterView v-slot="{ Component }">
    <KeepAlive :include="keepAliveComps">
      <component :is="Component"/>
    </KeepAlive>
  </RouterView>
</template>

<script setup>
import { storeToRefs } from 'pinia';
import useRouterStore from '@/store/router';

const { keepAliveComps } = storeToRefs(useRouterStore());
</script>

import 'vue-router';

export type LeaveCaches = string[];

declare module 'vue-router' {
  interface RouteMeta {
    leaveCaches?: LeaveCaches;
  }
}