How to use Vue Router to implement route interception and jump control?

How to use Vue Router to implement route interception and jump control?

Vue Router is the official routing manager of Vue.js, which allows us to implement the front-end routing function of SPA (Single Page Application). When using Vue Router, we need to master how to implement route interception and jump control to meet specific business needs. This article will introduce how to use Vue Router to implement route interception and jump control, and provide corresponding code examples.

First, we need to install and configure Vue Router. In the root directory of the project, use the command line to run the following command to install Vue Router:

npm install vue-router

After the installation is complete, create arouterfile in thesrcdirectory of the project folder, and create anindex.jsfile under the folder for configuring routing. In theindex.jsfile, we need to introduce Vue and Vue Router, and create a new Vue Router instance:

import Vue from 'vue' import VueRouter from 'vue-router' Vue.use(VueRouter) const router = new VueRouter({ // 在这里配置路由 }) export default router

In the routing configuration, we can passroutesArray to define routing rules. Each routing rule consists of apathand acomponent.pathspecifies the path of the route, andcomponentspecifies the component corresponding to the path. The following is a simple routing configuration example:

const router = new VueRouter({ routes: [ { path: '/', name: 'home', component: () => import('@/views/Home.vue') }, { path: '/about', name: 'about', component: () => import('@/views/About.vue') }, // 更多路由规则... ] })

Next, we will introduce how to implement route interception and jump control.

Route interception

Route interception can help us perform some operations before jumping to a certain route, such as verifying whether the user is logged in or checking user permissions. We can use thebeforeEachmethod provided by Vue Router to implement route interception.

In routing configuration, we can register a global beforeEach guard by calling therouter.beforeEachmethod. This front guard will be called before each route jump, and we can intercept and process the route here. The following is a simple route interception example:

router.beforeEach((to, from, next) => { // 在这里进行路由拦截 if (to.meta.requireAuth && !isLogin) { next('/login') } else { next() } })

In the above code, thetoparameter represents the routing object that is about to be jumped, and thefromparameter represents the current route object. In this front guard, we can make interception judgments based on business logic. If the route that requires login is not logged in, jump to the login page; otherwise, continue to jump normally.

Route jump control

In addition to intercepting routes, we can also control the jump when the route jumps. Vue Router provides thebeforeRouteLeavemethod to perform some operations before leaving the current route.

In the component, we can implement route jump control by defining abeforeRouteLeavefunction. This function will be called before leaving the current route, and we can do some judgment and processing here. The following is a simple route jump control example:

export default { beforeRouteLeave(to, from, next) { // 在这里进行路由跳转控制 if (this.isDirty) { if (confirm('当前页面有未保存的修改，是否离开？')) { next() } else { next(false) } } else { next() } } }

In the above code, thebeforeRouteLeavefunction has three parameters:to,fromandnext. We can use this function to determine whether to allow leaving the current route based on business logic. If you are not allowed to leave, you can cancel the route jump by callingnext(false); otherwise, callnext()to continue the normal jump.

To sum up, by using the route interception and jump control functions provided by Vue Router, we can easily implement custom routing logic. In actual development, we can flexibly use these functions according to specific business needs to improve user experience and system security.

The above is an introduction and code example on how to use Vue Router to implement route interception and jump control. I hope this article will help you understand Vue Router's route interception and jump control. If you have any questions or need more help, please leave a message for discussion.

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