code-architecture

Apply a four-part function ordering to TypeScript modules: constants and types first, then the main entry point, followed by supporting functions, and finally bottom-up helper utilities. This structure enforces readability and testability.

Service functions over classes enhance testability and reduce coupling in TypeScript projects. By avoiding class instances, you simplify dependency injection and make functional boundaries clearer, which improves codebase scalability and readability.

Structure TypeScript functions using a four-part order: constants/types, main entry, supporting utilities, and bottom-up helpers. This enforces a top-down reading flow where high-level logic precedes implementation details, maximizing code maintainability.

Use dependency injection when refactoring monolithic modules or designing new services to reduce coupling and simplify testing. It enforces clear module boundaries by inverting dependencies, making it easier to isolate and mock service functions.

Apply architecture patterns to existing monolithic TypeScript modules by extracting responsibilities, enforcing module boundaries, and reordering functions into constants, main entry, supporting, and helper sections. This refactoring improves codebase scalability and testability.