Error Handling in Async Code

Error propagation in async/await means: 1) Errors automatically bubble up through await expressions, 2) Each async function in the call stack can handle or re-throw errors, 3) Mimics synchronous try/catch behavior in async code, 4) Maintains error context and stack traces, 5) Enables centralized error handling at appropriate levels, 6) Allows for proper separation of concerns in error handling.