How can I implement authentication in a Svelte app using Svelte Router?

How can I implement authentication in a Svelte app using Svelte Router?

To implement authentication in a Svelte app with Svelte Router, you can use a combination of route guards and a store to manage user state.

What are route guards and how do I set them up?

Route guards are functions that check if a user is authenticated before allowing access to certain routes. You can create a guard function that checks the user's authentication status and redirects them if they're not logged in.

Can you show me a code example for a route guard?

Sure! Here's a simple example:

import { writable } from 'svelte/store';

export const isAuthenticated = writable(false);

export function requireAuth(to, from, next) {
  if (!isAuthenticated) {
    next({ path: '/login' });
  } else {
    next();
  }
}

You can use this function in your router configuration.

What about handling user sessions?

You can manage user sessions by storing a token in local storage or cookies after successful login, and checking for it on app load.