Error Handling

Robust error handling in TypeScript involves using custom error classes, Result types, and error boundaries to prevent crashes. This approach categorizes exceptions explicitly and manages expected failures without relying solely on try-catch blocks.

The Result type pattern, or Either pattern, is an exception management technique that returns explicit success or failure states. It forces developers to handle expected failures directly, improving application reliability by avoiding unhandled exceptions.

Asynchronous error handling requires proper try-catch implementation within async functions and promise chains. It ensures that rejected promises are caught, logged with relevant context, and managed without causing full application crashes.

User-facing error messages should present clear, non-technical explanations, while structured logging captures unexpected system errors with relevant context for debugging. This separation ensures users understand issues without exposing backend implementation details.

Error boundaries prevent application crashes by catching unhandled exceptions in UI component trees. They isolate errors to specific components, allowing the rest of the application to remain functional while displaying a fallback UI.