🎮 Promise concurrency lab

Same four requests, fired at once. Set each one's latency and whether it fails, pick a combinator, and hit Run — watch the exact moment the group settles, and what it keeps vs. throws away.

1 · Pick a combinator

0 ms

2 · The four requests

Presets

3 · What the group returned

Press Run to fire all four requests concurrently.

// the resolved value(s) or the rejection will appear here