主要利用keep-alive实现从列表页跳转到详情页，然后点击返回时，页面缓存不用重新请求资源。
一、在router里配置路由

import Vue from "vue";
import Router from "vue-router";

// 避免到当前位置的冗余导航
const originalPush = Router.prototype.push
Router.prototype.push = function push(location) {
   return originalPush.call(this, location).catch(err => err)
}

Vue.use(Router);
export default new Router({
  base: '',
  routes: [{
      path: "/",
      name: "index",
      component: () => import("@/layout"),
      redirect: '/login',
      children: [
        {
          path: 'dutySheet',
          name: 'dutySheet',
          component: () => import("@/pages/Dashboard/DutySheet")
        },
        {
          path: 'searchWord',
          name: 'searchWord',
          component: () => import("@/pages/dailyReportManage/searchWord/index"),
          meta: {
            keepAlive: true // 需要缓存页面
          }
        },
        // 匹配维护
        {
          path: "troopAction",
          name: "troopAction",
          component: () => import("@/pages/Dashboard/TroopAction"),
          meta: {
            keepAlive: false//  不需要缓存
          }
  		 },
      ]
    },
  ]
});

二、配置APP.vue
使用keep-alive来进行缓存

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

三、点击返回按钮时调用this.$router.back()方法就可以了

      // 返回
      bacKBnt(){
        this.$router.back()
      },