How to use routing to implement page interception and jump processing in a Vue project?

How to use routing to implement page interception and jump processing in a Vue project?

Introduction:
In the Vue project, routing is a very important part, it is responsible for jumps and management between pages. For some pages that require login status or permission control, we often need to perform page interception and jump processing. This article will introduce how to use routing in the Vue project to implement page interception and jump processing, and attach code examples.

1. Install and configure routing
   First, we need to install and configure Vue routing. You can use the command npm install vue-router to install Vue routing, and configure routing in the project's main.js file.

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

Vue.use(VueRouter)

// 定义路由规则
const routes = [
  // 路由配置
]

// 创建路由实例
const router = new VueRouter({
  routes
})

// 将路由实例注入根Vue实例中
new Vue({
  router,
  render: h => h(App)
}).$mount('#app')

2. Create an interceptor
   Next, we need to create an interceptor to implement page interception and jump processing. In Vue routing, we can use navigation guards to implement interceptors. There are three types of navigation guards: global front guards, global back guards and route-exclusive guards.

In the global front guard, we can process page interception. For example, check login status or permissions, etc. The code example is as follows:

router.beforeEach((to, from, next) => {
  // 判断是否需要登录态
  if (to.meta.requireAuth) {
    // 判断是否已登录
    if (isLogin()) {
      // 已登录，可以继续跳转
      next()
    } else {
      // 未登录，跳转到登录页
      next('/login')
    }
  } else {
    // 不需要登录态，直接跳转
    next()
  }
})

3. Configuring routing rules
   In the routing configuration, we can set the meta field for pages that need to be intercepted and redirected to mark whether login status is required. For example:

const routes = [
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    meta: { requireAuth: true } // 需要登录态
  },
  {
    path: '/about',
    component: About,
    meta: { requireAuth: false } // 不需要登录态
  }
]

4. Page jump and interception processing
   With the above configuration, when the user accesses a page that requires login status, the route will automatically jump to the login page. We can log in on the login page and then jump to the target page. The code example is as follows:

methods: {
  login() {
    // 登录操作
    // ...

    // 登录成功后，跳转到目标页面
    this.$router.push('/home')
  }
}

In summary, by using the navigation guard of Vue routing, we can easily implement page interception and jump processing. By judging the meta field of the page to determine whether a login state is required, permission control can be achieved. I hope this article can help you use routing to implement page interception and jump processing in your Vue project.

Note: The sample code in this article is a simplified version, and it needs to be adjusted and supplemented according to specific needs in actual projects.

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