What are some usage scenarios for Vue 3 router guards?

What are some usage scenarios for Vue 3 router guards?

Vue 3 router guards are used to control access to routes. Common scenarios include authentication checks, role-based access, and data fetching before entering a route.

Can you explain how to implement an authentication guard?

Sure! You can create a global before guard using router.beforeEach. Check if the user is authenticated and redirect if not.

What about handling permissions for different user roles?

You can use route meta fields to define roles required for a route and check these in your guard to allow or deny access.

Are there any performance considerations with using guards?

Yes, excessive checks in guards can slow down navigation. It's best to keep them lightweight and only check what's necessary.

Can I use async functions in router guards?

Absolutely! You can return a Promise in your guard to handle asynchronous operations like API calls.