JavaScript/TypeScript Best Practices

Code Style

• Use const by default, let when reassignment is needed
• Use template literals for string interpolation
• Prefer arrow functions for callbacks
• Use destructuring for object/array access
• Use async/await over .then() chains
• Use semicolons consistently (pick a style)

Error Handling

• Always handle promise rejections with .catch() or try/catch
• Use try/catch with async/await
• Provide meaningful error messages with context
• Don't swallow errors silently
• Create custom error classes for domain errors