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To handle errors as values in TypeScript, you return typed unions (Error | T) rather than throwing exceptions. This Go-style approach provides predictable, exhaustive error handling across both synchronous and asynchronous code without relying on wrapper types.

The best way to pattern match tagged errors is using a matchError function to route and identify specific error types. This enables exhaustive handling and allows you to find causes with rich error context, replacing fragile string checks with structured matching.

You create typed domain errors with interpolation using a createTaggedError utility. This allows you to define specific error types and inject dynamic context data directly into the error structure, ensuring strongly typed domain-specific failures.

Yes, Go-style error handling works seamlessly with async TypeScript code. It uses try and unwrap functions to bridge sync and async boundaries, while utilizing disposable stacks to guarantee safe resource cleanup during execution.

Returning typed unions instead of throwing exceptions makes error handling predictable and exhaustive. By treating errors as values, you eliminate uncaught exceptions and force the compiler to verify all potential error paths are handled safely.