How can I protect routes in a Svelte application using authentication?

How can I protect routes in a Svelte application using authentication?

You can protect routes in a Svelte application by using a combination of Svelte stores and route guards. First, set up an authentication store to manage user login state.

What does the authentication store look like?

The authentication store can be a simple writable store that holds the user's authentication status and token. You can create it like this:

import { writable } from 'svelte/store';

export const authStore = writable({ isAuthenticated: false, token: null });

How do I implement route guards with this store?

You can create a route guard by checking the authentication status in your route definitions. If the user is not authenticated, redirect them to the login page.

Can you show me an example of a route guard?

Sure! In your Svelte routing setup, you can use a function like this:

import { authStore } from './authStore';

function requireAuth(to, from, next) {
    authStore.subscribe(auth => {
        if (!auth.isAuthenticated) {
            next({ path: '/login' });
        } else {
            next();
        }
    });
}