vue项目开发遇到需要部分页面要缓存起来，返回时，需要保持上一个页面跳转前的状态。

路由配置

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

const router = new Router({
  base: '/',
  routes: [
    {
      path: '/',
      name: '',
      component: resolve => require(['@/views/home'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    }, {
      path: '/videoList',
      name: '',
      component: resolve => require(['@/views/videoList'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: true
      }
    }, {
      path: '/videoDetail',
      name: '',
      component: resolve => require(['@/views/videoDetail'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    }, {
      path: '/detail',
      name: '',
      component: resolve => require(['@/views/detail'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    }, {
      path: '/signBack',
      name: '',
      component: resolve => require(['@/views/signBack'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    }, {
      path: '/sign',
      name: '',
      component: resolve => require(['@/views/sign'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    }, {
      path: '/test',
      name: '',
      component: resolve => require(['@/views/test'], resolve),
      meta: {
        requiresAuth: false,
        showPage: false,
        keepAlive: false
      }
    },
  ]
})
router.beforeEach((to, from, next) => {
  console.log(to)
  if (to.meta.requiresAuth) {
    if (!localStorage.getItem('token')) {
      next('/login')
    } else {
      next()
    }
  } else {
    next()
  }
})
//获取原型对象上的push函数
const originalPush = Router.prototype.push
//修改原型对象中的push方法
Router.prototype.push = function push(location) {
  return originalPush.call(this, location).catch(err => err)
}
export default router

配置app.vue

<keep-alive>
    <router-view v-if="$route.meta.keepAlive"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>