node

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Node / TypeScript

Type Safety

• Always use explicit type hints for function parameters.
• Always use explicit return types (@typescript-eslint/explicit-function-return-type).
• Never use any — use unknown and narrow, or define a proper type.
• Use type imports for type-only imports (import type { Foo } from ...).

ESLint Rules

Use ESLint to enforce consistent code style.

Use ../../config/.eslintrc as the base configuration.

Error Handling

• Never use bare catch(e) — type-narrow or use unknown and check with instanceof.
• Use the most specific built-in or library error available (e.g., TypeError, RangeError). Custom error classes are a last resort.
• Always handle promise rejections — no fire-and-forget .then() without .catch().

Testing

Use Jest as the default test runner. Consider Vitest for new standalone projects.

Logging

Logs should be one line when possible.

Package Management

Use npm for package management.

Consider Deno 2 or Bun for new standalone projects.