How to use the routing authentication function in the Vue document

Vue is a very popular JavaScript framework that provides a very convenient and easy-to-use routing mechanism. In Vue, we can manage page jumps by defining routes, but in the actual development process, we often need to authenticate certain routes to ensure that users can only access pages for which they have permission. This article will introduce how to use the routing authentication function provided in the Vue documentation.

What is the routing authentication function?

The routing authentication function is one of the global routing guards provided by Vue. It can be used to verify whether the user has the authority to access a certain route. The routing authentication function needs to be defined in the routing configuration and will be executed before entering a certain route. If the route authentication function returns true, it means that the user has the permission to access the route and can enter normally; otherwise, if it returns false, it means that the user does not have permission to access the route and will be redirected to other pages or an error message will be displayed.

How to define the routing authentication function?

In Vue, we can use the beforeEnter function to define the routing authentication function. The beforeEnter function is a function defined separately in the routing configuration. It receives three parameters to, from and next.

The to parameter represents the target routing object to be entered, from represents the current routing object, and next is a function used to control the jump behavior of routing. In the beforeEnter function, we can judge the user's permissions and call the next function based on the judgment result to control whether the route should continue to jump.

The following is a sample code for a beforeEnter function:

const router = new VueRouter({
  routes: [
    {
      path: '/dashboard',
      component: Dashboard,
      beforeEnter: (to, from, next) => {
        if (user.checkAdmin()) {
          next()
        } else {
          next('/login')
        }
      }
    }
  ]
})

In the above code, we define a function named beforeEnter and use it as the beforeEnter function of Dashboard routing. When the user enters the /dashboard route, Vue will call the beforeEnter function and pass it the three parameters to, from and next.

In the beforeEnter function, we first call a function called checkAdmin to verify whether the user is an administrator. If the user is an administrator, call the next function to allow the route to jump to the /dashboard route normally; otherwise, call next('/login') to redirect the user to the login page.

Note that if the next function is not called, the route will be blocked and will not jump by default.

Application Scenarios of Routing Authentication Function

The routing authentication function is suitable for all scenarios where user permissions need to be verified. For example:

1. Permission management: For example, administrators need to have administrator permissions to access certain pages.
2. Login verification: For example, when users access certain pages that require login, they need to perform login verification first.
3. Account status verification: For example, when a user accesses certain pages that require account opening, they need to verify whether the account has been opened.

Summary

In Vue, the route authentication function is a very practical feature that can be used to verify whether the user has the authority to access a certain route. By defining the beforeEnter function and judging user permissions in it, the routing authentication function can be very conveniently implemented.

The above is the detailed content of How to use the routing authentication function in the Vue document. For more information, please follow other related articles on the PHP Chinese website!