What are Vue routing guards and how do I use them?

What are Vue routing guards and how do I use them?

Vue routing guards are functions that control access to routes in a Vue application. They can be used to protect routes, redirect users, or perform checks before entering a route.

Can you give me an example of a beforeEnter guard?

Sure! Here's a simple example:

const router = new VueRouter({
  routes: [
    {
      path: '/protected',
      component: ProtectedComponent,
      beforeEnter: (to, from, next) => {
        if (isAuthenticated()) {
          next(); // allow access
        } else {
          next('/login'); // redirect to login
        }
      }
    }
  ]
});

What other types of guards are there?

In addition to beforeEnter, there are beforeRouteEnter, beforeRouteUpdate, and beforeRouteLeave guards. Each serves different purposes in managing route transitions.

How do I handle asynchronous operations in guards?

You can handle asynchronous operations by returning a Promise in your guard. For example:

beforeEnter: (to, from, next) => {
  checkUserStatus().then(isAuthenticated => {
    if (isAuthenticated) {
      next();
    } else {
      next('/login');
    }
  });
}