2. Error Handling Practices

• 2.1 Use Async-Await or promises for async error handling
• 2.2 Use only the built-in Error object
• 2.3 Distinguish operational vs programmer errors
• 2.4 Handle errors centrally, not within a middleware
• 2.5 Document API errors using Swagger or GraphQL
• 2.6 Exit the process gracefully when a stranger comes to town
• 2.7 Use a mature logger to increase error visibility
• 2.8 Test error flows using your favorite test framework
• 2.9 Discover errors and downtime using APM products
• 2.10 Catch unhandled promise rejections
• 2.11 Fail fast, validate arguments using a dedicated library
• 2.12 Always await promises before returning to avoid a partial stacktrace