typescript-pro

Type-safe TypeScript systems use discriminated unions to model state machines and type guards to narrow runtime values. This approach enforces compile-time correctness and prevents invalid states across large codebases.

Configure strict tsconfig settings by enabling strict compiler flags and declaration outputs. This setup supports monorepo and library ergonomics while maintaining build correctness checks across packages.

Branded types are nominal typing patterns in TypeScript used to prevent mixing of structurally identical values like IDs. You need them when modeling domain constraints to ensure invalid states are unrepresentable at compile-time.

TypeScript integrates with tRPC to achieve full-stack type safety workflows. By sharing types across the stack, developers can design type-first APIs that prevent client-server mismatches at compile time.

The best way to implement exhaustive checking is combining discriminated unions with conditional types and the never type. This pattern guarantees all possible cases are handled, preventing unhandled states during codebase evolution.

You can use advanced generics, mapped types, and template literal types to model real domain constraints in TypeScript. These type-first design patterns enforce strict data shapes and prevent invalid data assignments at compile-time.