better-result-adopt

TypeScript error handling migrates to typed Result-based errors by replacing try/catch blocks and Promise rejections with Result flows. Wrap I/O boundaries using Result.try and Result.tryPromise to ensure safe error propagation and composable railway-oriented programming.

Railway-oriented programming in TypeScript models errors as typed values using Result flows instead of exceptions. It enforces defining TaggedError classes to represent domain errors and uses pattern matching to handle success and failure cases compositionally.

Converting thrown exceptions into Result flows in JavaScript requires wrapping boundary calls with Result.try and Result.tryPromise. This captures exceptions and Promise rejections, returning typed Result values for safe propagation without try/catch blocks.

Yes, defining custom error classes is required to use typed errors in TypeScript. The migration enforces defining TaggedError classes to accurately model domain errors, enabling type-safe pattern matching and composable error handling across Result flows.

The best way to handle I/O boundary errors in TypeScript without try/catch is wrapping them with Result.try and Result.tryPromise. This converts unpredictable I/O failures into typed Result values for safe propagation and pattern matching.

You should avoid typed Result-based errors when migrating simple synchronous logic lacking I/O boundaries or domain errors. It targets complex codebases needing railway-oriented programming, requiring TaggedError definitions and pattern matching overhead unsuitable for trivial scripts.