Sync execution

Console output or cleanup runs in an order that does not match the source code order. Most setup code, imports, and simple calculations behave this way.

Looking for async behavior where there is none.

Make ordering explicit instead of relying on when a queued callback might happen to run.

Promise.resolve().then(handleMicrotask);
setTimeout(handleTimer, 0);
// Assert/expect the microtask before the timer.

The console lane proves the visible order: A -> B -> C. The active line and queues show why source order changed.

Add temporary logs around the sync line, promise callback, and timer, then confirm the order without adding arbitrary delays.