Error Handling Traps

• Unhandled rejection crashes Node 15+ — always .catch() or try/catch with await
• Callback errors don't throw — must check if (err) in callback, try/catch useless
• process.on('uncaughtException') — log and EXIT, don't try to continue
• process.on('unhandledRejection') — same, log and exit gracefully
• Throwing non-Error — loses stack trace, always throw new Error()
• error event on streams — unhandled crashes process, must attach handler