vue路由守衛的寫法

router.js(全局守衛)

import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'
import child from '../components/child.vue'
import child1 from '../components/child1.vue'

Vue.use(VueRouter)

  const routes = [
  // {
  //   path: '/',
  //   name: 'Home',
  //   component: '../App.vue'
  // },
  {
    path: '/about',
    name: 'About',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  },
      {
          path: '/child/:data',
          name: 'child',
          component: child
          // component: '../components/child.vue'
      },
      {
          path: '/child1',
          component: child1
          // component: '../components/child.vue'
      }

]

const router = new VueRouter({
  //mode: 'history',
  //base: process.env.BASE_URL,
  routes
})

router.beforeEach((to,from,next) => {
    console.log('全局守衛');
    // 以下可以做一些路由判斷
    next(); //不寫這一句會無法跳轉
});
export default router

局部守衛(child.vue)

<template>
    <div>
        我是子組件
        <slot></slot>
    </div>
</template>

<script>
    export default {
        //局部守衛寫法start
        beforeRouteEnter(to,from,next) {
            console.log('局部路由守衛main');
            next();
        },
        //局部守衛寫法end
        mounted() {
            console.log(this.$route)
        }
    }
</script>