Time-Travel Debugging: Replaying Production Bugs Locally
2 days ago
- #JavaScript
- #Debugging
- #EffectSystem
- Debugging production crashes is challenging when the issue doesn't reproduce locally.
- An Effect System in JavaScript allows business logic to describe actions via Command objects without executing them directly.
- Commands can be composed into pipelines that handle Success and Failure cases automatically.
- Execution traces can be recorded and replayed deterministically, eliminating the need for mocking external services.
- A time-travel function can replay execution traces locally, making debugging more straightforward.
- The approach ensures user privacy by redacting sensitive information before logging.
- Pure functions and side-effect management lead to deterministic and secure execution traces.