refactoring-inline-types

Extract inline types by identifying object type literals in function parameters, unions, and intersections, then convert them into named interfaces or type aliases in a dedicated types module. This improves maintainability and enables reuse across your codebase.

Refactor inline types when they appear duplicated across files, become deeply nested, or reduce code readability. Named interfaces and type aliases make complex shapes explicit, document intent through naming, and let you reuse types consistently.

Yes. When extracting inline types, leverage generics and utility types to create flexible, reusable type definitions. This reduces duplication and makes your type structure more maintainable across your TypeScript codebase.

Create a dedicated types module (types.ts or types/index.ts) and export named interfaces and type aliases from it. Update all references in your codebase to import from this centralized location, establishing a single source of truth.

Add JSDoc comments to your extracted interfaces and type aliases to clarify purpose and usage. Clear naming conventions combined with documentation make your type structure self-explanatory and easier for teammates to adopt.