Combination of Vue Router redirection function and route guard

Vue Router is the official routing manager of Vue.js. It allows us to build single page applications (SPA) by defining routes, creating nested routes, and adding route guards. In Vue Router, the combination of redirection function and route guard can achieve more flexible routing control and user navigation.

The redirection function allows us to redirect users to another specified path when they access a specified path. This is useful when handling user input errors or unifying routing jumps. For example, when a user visits the root path, we can redirect them to the homepage. The redirection function is implemented in Vue Router by using the redirect attribute in the routing configuration.

In addition to the redirection function, Vue Router also provides a route guard function, which is used to perform some operations before and after route jumps. For example, we can perform permission verification before the user jumps to a certain route, or update the title of the page after the user jumps, etc. Route guards in Vue Router can be divided into global guards, route-exclusive guards and intra-component guards.

Combining the redirection function and routing guards can achieve more complex routing control. For example, we can use route guards to perform permission verification when a user accesses a route that requires permission, and redirect the user to the login page if the verification fails. The specific steps are as follows:

First, define the routes that require permission verification in the routing configuration and add the redirection function. The sample code is as follows:

const routes = [
  {
    path: '/dashboard',
    component: Dashboard,
    meta: { requiresAuth: true }  // 添加需要权限验证的标记
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/',
    redirect: '/dashboard'  // 添加重定向功能
  }
]

const router = new VueRouter({
  routes
})

Then, perform permission verification and redirection in the global front guard. The sample code is as follows:

router.beforeEach((to, from, next) => {
  const requiresAuth = to.matched.some(record => record.meta.requiresAuth)  // 判断是否需要权限验证
  const isLoggedIn = checkIfLoggedIn()  // 判断用户是否已登录

  if (requiresAuth && !isLoggedIn) {  // 需要权限验证且用户未登录
    next('/login')  // 重定向到登录页
  } else {
    next()
  }
})

checkIfLoggedIn in the above code is a custom function used to determine whether the user is logged in. According to business needs, we can define this function according to the actual situation.

Through the above steps, combined with the redirection function and routing guards, we have implemented permission verification and redirection operations when users access routes that require permission verification. In this way, we can effectively control users' routing access rights and improve application security and user experience.

To sum up, the combination of Vue Router's redirection function and routing guards can achieve flexible routing control and user navigation. By properly configuring routes and using route guards for permission verification and redirection operations, we can effectively improve the security and availability of our applications. In actual development, we can flexibly use these functions according to business needs to make our applications more powerful and easier to maintain.

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