better-result-adopt

A typed Result error represents failures as explicit values instead of thrown exceptions. Using typed Result errors in TypeScript makes error propagation structured across API boundaries and asynchronous flows, preventing uncaught exceptions and simplifying control flow.

To migrate try/catch blocks to Result-based error handling, identify I/O boundaries and wrap them using Result.try or Result.tryPromise. Then define TaggedError classes for domain failures and update function signatures to return Result types instead of throwing exceptions.

Yes, better-result works with asynchronous flows by wrapping Promise-based operations with Result.tryPromise. This converts promise rejections into typed Result err values, allowing you to handle asynchronous errors as structured TaggedError instances.

The best way to adopt railway-oriented programming is starting at I/O boundaries like database or API calls. Introduce TaggedError classes and wrap boundary functions with Result.try, then iteratively update internal callers to propagate Result types through the call stack.

You should avoid Result types for error handling when migrating internal logic that lacks clear API or I/O boundaries. Result types are designed for structured error propagation across boundaries, so deeply internal synchronous logic may not require this migration overhead.