What are navigation guards in Vue.js and how do I use them?

What are navigation guards in Vue.js and how do I use them?

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

Can you give me an example of how to implement a navigation guard?

Sure! You can define a global navigation guard in your router configuration like this:

router.beforeEach((to, from, next) => {
  if (to.meta.requiresAuth && !isLoggedIn()) {
    next({ name: 'Login' });
  } else {
    next();
  }
});

What is the difference between global and route-specific navigation guards?

Global guards apply to all routes, while route-specific guards are defined on individual routes. This allows for more granular control.

Can I use navigation guards with Vue Router 4?

Yes, navigation guards are fully supported in Vue Router 4, and the implementation is quite similar to previous versions.