Sveltekit now can create cookies (Fixed problem with cookies).

sveltejs/kit#8409

client/src/routes/+layout.svelte

@@ -1,5 +1,13 @@
+<script>
+  export let data;
+</script>
+
 <h1>Welcome to Local Bargains</h1>
-<a href="/auth/register"> Sign up </a>
-<a href="/auth/login"> Sign in </a>
+{#if data.accessToken}
+  {data.accessToken}
+{:else}
+  <a href="/auth/register"> Sign up </a>
+  <a href="/auth/login"> Sign in </a>
+{/if}
 
 <slot />

client/src/routes/+page.svelte

@@ -1,6 +1,3 @@
-<script>
-</script>
-
 <svelte:head>
   <title>Local Bargains!</title>
 </svelte:head>

client/src/routes/auth/login/+page.server.js

@@ -1,4 +1,5 @@
 import { fail, redirect } from '@sveltejs/kit';
+import * as set_cookie_parser from 'set-cookie-parser';
 
 export const actions = {
   form: async ({ request, url, cookies }) => {
@@ -34,8 +35,11 @@ export const actions = {
         message: 'Bad password!'
       });
     }
-    console.log(response);
-    console.log(cookies.getAll());
+    const { headers } = response;
+    for (const str of set_cookie_parser.splitCookiesString(headers.get('set-cookie'))) {
+      const { name, value, ...options } = set_cookie_parser.parseString(str);
+      cookies.set(name, value, { ...options });
+    }
     throw redirect(303, url.searchParams.get('redirectTo') || '/');
   }
 }