Merge pull request #241 from ticua07/add-error-404-handling

Handle non-existant categories and urls

src/routes/+error.svelte

@@ -0,0 +1,5 @@
+<script lang="ts">
+  import { redirect } from '@sveltejs/kit';
+
+  redirect(301, '/');
+</script>

src/routes/directory/[slug]/+page.ts

@@ -21,6 +21,11 @@ export const load = (async ({ params }) => {
     }
   });
 
+  // If SVGs array is empty, category can't exist
+  if (svgsByCategory.length === 0) {
+    return error(404, 'Not found');
+  }
+
   return {
     category: slug as string,
     svgs: svgsByCategory