Docs
Parsing
Explain how parsing compatibility is evaluated and where edge cases require extra scrutiny.
Guidance
Treat Parsing As A Migration Review Area
Parsing behavior is where hidden dependencies tend to accumulate over years of product code. Teams often rely on forgiving input handling, fallback behavior, and malformed-but-accepted strings without realizing it until a replacement changes the outcome.
This is why parsing should be compared using real fixtures from your application, not just generic examples.
- Review custom format parsing and strict mode assumptions.
- Compare invalid inputs as carefully as valid ones.
- Track known edge-case differences explicitly during rollout.
How To Use This Doc
Use this page as a migration review aid rather than as a generic tutorial. If the behavior in this area is business-critical, compare it directly against your current moment.js usage and record the outcome before expanding rollout.