Vue-Router: How to use routing meta information to manage routes?

Vue-Router: How to use routing meta information to manage routing?

Introduction:
Vue-Router is the official routing manager of Vue.js, which can help us quickly build single-page applications (SPA). In addition to common routing functions, Vue-Router also supports the use of routing meta information to manage and control routing. Routing metainformation is a custom attribute that can be attached to a route, which can help us implement some special logic or permission control.

1. What is routing meta information?
Routing meta information refers to the attributes and values ​​attached to each route. We can control routing behavior based on this metainformation. For example, we can add an attribute to the routing metainformation to control whether login is required to access the route.

2. How to use routing meta information?

1. Declare routing meta information
   When defining a route, you can add routing meta information through the meta field. For example:

   const routes = [
     {
    path: '/home',
    component: Home,
    meta: { requiresAuth: true }
     },
     {
    path: '/about',
    component: About,
    meta: { requiresAuth: false }
     }
   ]

   In the above code, we added a meta field containing the requiresAuth attribute for the '/home' route, which means that the /home page requires authentication to access, but the /about page does not. .

2. Judge the routing meta information and handle it accordingly
   We can determine whether certain operations need to be performed based on the routing meta information in the routing navigation guard. Navigation guard is a hook function triggered when the route jumps. For example, in the global front guard, we can perform permission verification to determine whether the user has permission to access a certain route:

   router.beforeEach((to, from, next) => {
     if (to.matched.some(record => record.meta.requiresAuth)) {
    // 这里可以根据需求进行身份验证逻辑
    if (需要验证身份) {
      next()
    } else {
      next('/login') // 如果没有权限，跳转到登录页面
    }
     } else {
    next() // 如果不需要验证，直接进行下一个路由
     }
   })

   In the above code, we first determine whether the metainformation of the current route has the requiresAuth attribute. , if there is, then proceed to the authentication logic, if not, proceed directly to the next route.

3. Get route meta information in the component
   Once the route meta information is set, we can get it through $route.meta. For example, in the component we can get the meta information of the /about route in the following way:

   export default {
     created() {
    console.log(this.$route.meta.requiresAuth); // 输出false
     }
   }

   In the above code, we use this.$route to get the current routing information, and pass $route.meta. requiresAuth to get the value of the requiresAuth attribute.

Conclusion:
By using routing meta-information, we can easily control routing behavior and permission control. Whether it is a global navigation guard or in a local component, we can decide whether to allow the user to access a page based on routing metainformation. Using Vue-Router's routing meta information feature can make our application more flexible and secure.

The above is an introduction to how Vue-Router uses routing meta information to manage routing. I hope it will be helpful to you.

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