Flow or how I learned to stop worrying and typecheck my React code
summary
Flow claims to be a code‑intelligence engine not just a type system, built to run whole‑repo static analysis so tools like minifiers and refactorers get reliable facts. The open‑source Flow ships with a static type checker, supports gradual type system adoption, literal singleton and disjoint union types, and inference that tracks null and control flow. Examples show catching NaN/null bugs, inferring safe branches, and enabling editor integration and optimizers.
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chapters (7)
- 0:00Start
- 7:31Simple Example
- 10:16Unsafe Code: Reject
- 11:47Safe, Idiomatic Code: Accept
- 13:32Type Annotations + Modules
- 15:36Stay Idiomatic
- 19:36The Future
