javascript-typescript

TypeScript strict configuration enforces strict compilerOptions like noImplicitAny and strictNullChecks. Configure tsconfig.json with strict: true, then use utility types like Pick, Omit, and Partial to ensure type safety across frontend, backend, or full-stack codebases. This prevents runtime errors and scales patterns across teams.

Discriminated unions use a shared literal field to narrow types safely. They're essential for handling multiple related states—like API responses or UI components—without losing type information. TypeScript's type guards narrow the union automatically, improving both safety and IDE autocomplete.

Yes. Modern React and Node.js both support ES2022+ and TypeScript. Apply generic constraints, destructuring, optional chaining, and error handling idioms consistently across frontend and backend. Strict types and utility patterns ensure compatibility between layers in full-stack applications.

Utility types like Pick, Omit, Partial, and Required derive new types from existing ones without duplication. Pick selects specific fields, Omit excludes them, Partial makes all fields optional, and Required enforces all fields. These scale type definitions across large codebases.

Generic constraints use the extends keyword to restrict what types can be passed to a function or class. For example, a function accepting T extends { id: string } ensures the argument always has an id field. This catches errors at compile time and improves function contracts.