bus event bus use

1. Route
   1) Each interface of the route is fixed in the corresponding navigation bar: a bus event bus is added to the nav component
   

eventBus.js

import Vue from 'vue'export default new Vue()

Introduced in navMain.vue

import eventBus from "@/utils/eventBus.js"created(){eventBus.$on("message", data => {console.log("A component passed to B component", data);this.toggleNav(data)});

Other interfaces should be quoted

import eventBus from "@/utils/eventBus.js"let param = { id: 1, key: 'xxx', path:`/xxx`, name: 'xxx' }eventBus.$emit("message", param)