What are the best practices for using router guards in Vue.js?

What are the best practices for using router guards in Vue.js?

When using router guards in Vue.js, it's important to keep your logic simple, avoid unnecessary complexity, and ensure that guards are reusable. You should also handle asynchronous operations properly and provide user feedback during navigation.

Can you give an example of a simple router guard?

Sure! A simple router guard can check if a user is authenticated before allowing access to a route. Here's an example:

router.beforeEach((to, from, next) => {
  const isAuthenticated = // logic to check if user is authenticated;
  if (to.meta.requiresAuth && !isAuthenticated) {
    next({ name: 'Login' }); // redirect to login if not authenticated
  } else {
    next(); // proceed to the route
  }
});

What should I avoid when implementing router guards?

You should avoid heavy computations or API calls directly in the guard, as this can slow down navigation. Also, try not to have too many nested guards, as it can make your routing logic hard to follow.

How can I test my router guards?

You can test your router guards by writing unit tests for your navigation logic. Use tools like Jest or Mocha to simulate route changes and check if the guards behave as expected.