typescript

Strict mode TypeScript enforces rigorous type checking by enabling compiler flags like `noImplicitAny`, `strictNullChecks`, and `strictFunctionTypes` in your `tsconfig.json`. This catches type errors at compile time, preventing runtime failures and ensuring type-safe APIs across frontend, backend, and library projects.

Generics enable you to write reusable, type-safe functions and classes that work with multiple types while maintaining full type information. Utility types like `Partial`, `Pick`, and `Record` transform existing types to create expressive, composable APIs without sacrificing type safety or runtime performance.

Discriminated unions use a literal type field to distinguish between variant shapes, enabling TypeScript to narrow types exhaustively. This pattern prevents runtime errors by forcing you to handle every variant case explicitly before accessing variant-specific properties.

Yes, strict mode configuration applies uniformly across frontend applications, backend services, and library projects. The same strict compiler settings and type system features enforce consistency and catch errors regardless of the deployment target or module system you choose.

Type-safe factory functions validate inputs and enforce type constraints at creation time, preventing invalid object states before they enter your application. This pattern is especially valuable in scalable software where composition and reusability matter across large codebases.

TypeScript supports ES modules, CommonJS, and other module systems through `tsconfig.json` settings. Choosing the right module system depends on your target environment and build tool, and strict mode works consistently across all module configurations.