一、 router/index.js

// 引入路由
// eslint-disable-next-line no-unused-vars
import Vue from 'vue'
import VueRouter from 'vue-router'
import Box_1 from '../pages/Box_1.vue'
import Box_2 from '../pages/Box_2.vue'
import Menu_1 from '../pages/Menu_1.vue'
import Menu_2 from '../pages/Menu_2.vue'

Vue.use(VueRouter)
const originalPush = VueRouter.prototype.push
VueRouter.prototype.push = function push(location) {
  return originalPush.call(this, location).catch(err => err)
}


// 创建一个路由器

export default new VueRouter({
    routes: [

        {
            path: '/Box_1',
            component: Box_1,
            children: [
                {
                    name: 'myMenu',  // 用name代替路径
                    path: 'Menu_1',
                    component: Menu_1,
                    props($route){
                        return{
                            id:$route.params.id,
                            name:$route.params.name,
                        }
                    }
                },
                {
                    path: 'Menu_2',
                    component: Menu_2
                },
            ]
        },
        {
            path: '/Box_2',
            component: Box_2,
            children: [
                {
                    path: 'Menu_1',
                    component: Menu_1
                },
                {
                    path: 'Menu_2',
                    component: Menu_2
                },

            ]
        },
    ]


})

2、box_1.vue

<template>
  <div class="m_box">
    <div class="top">
      <!-- 路由跳转链接 -->

      <router-link
        replace
        class="box_1"
        active-class="active"
        :to="{
          name: 'myMenu',
          params: {
            id: id,
            name: name,
          },
        }"
      >
        菜单1
      </router-link>

      <!-- 路由跳转链接 -->
      <router-link
        replace
        class="box_2"
        to="/Box_1/menu_2"
        active-class="active"
      >
        菜单2
      </router-link>

      <!-- <button @click="justTo">编程式路由跳转</button> -->
      <button class="box_3" @click="justTo">编程路由跳转</button>
    </div>
    <div class="bottom">
      <!-- 我是Box_1组件! -->
      <router-view></router-view>
    </div>
  </div>
</template>

<script>
export default {
  name: "Box_1",
  data() {
    return {
      id: "666",
      name: "我是Box_1组件传过来的参数",
    };
  },
  methods: {
    justTo() {
      console.log(this.$router);

      this.$router.push({
        name: "myMenu",
        params: {
          id: this.id,
          name: this.name,
        },
      });

      // alert("aaaa");
    },
  },
};
</script>

3、Menu_1.vue

<template>
  <div class="m_box">{{id}}.{{name}}</div>
</template>

<script>
export default {
  name: "Menu_1",
  props:['id','name'],
  mounted() {
    console.log("=============");
    console.log(this);
  },
};

</script>

二、当出现重复异常错误

出现vue-router.esm.js?3423:2065 Uncaught (in promise) NavigationDuplicated: Avoided redundant navigation to current location: "/Box_1/Menu_1".

解决办法：

增加：

import Vue from 'vue'
import VueRouter from 'vue-router'


Vue.use(VueRouter)
const originalPush = VueRouter.prototype.push
VueRouter.prototype.push = function push(location) {
  return originalPush.call(this, location).catch(err => err)
}