...

routes/api/joke.ts

@@ -1,6 +1,14 @@
 import { FreshContext } from "$fresh/server.ts";
 
-Deno.writeTextFileSync('./test.txt', 'foo');
+// Deno.writeTextFileSync('./test.txt', 'foo');
+
+// error: Uncaught (in promise) PermissionDenied: Permission denied (os error 13): writefile './test.txt'
+// Deno.writeTextFileSync('./test.txt', 'foo');
+//      ^
+//     at writeFileSync (ext:deno_fs/30_fs.js:805:3)
+//     at Object.writeTextFileSync (ext:deno_fs/30_fs.js:868:10)
+//     at file:///app/routes/api/joke.ts:3:6
+
 
 // Jokes courtesy of https://punsandoneliners.com/randomness/programmer-jokes/
 const JOKES = [