react-typescript

Type-safe React components require explicit prop typing using interfaces or types, proper return type annotations, and React's FC generic. Define props interfaces, apply them to your component signature, and annotate event handlers and state types to enable compile-time checking and prevent runtime errors across typed components.

Type React hooks by annotating state types in useState, specifying dependency array element types, and declaring explicit return types for custom hooks. Use generics for reusable hook logic, type event parameters, and reference parameters to create maintainable, reusable logic that catches type mismatches before runtime.

Create a typed context by defining a context interface, wrapping your provider component with explicit type annotations, and using generics for context values. Type the useContext hook call, ensure providers and consumers align on types, and apply discriminated unions for complex state shapes to enable type-safe shared state.

Polymorphic components use discriminated unions and conditional types to accept different prop shapes based on a variant or component type prop. TypeScript enables strict typing for each variant, preventing invalid prop combinations and ensuring that polymorphic buttons, forms, or layout primitives maintain type safety across usage contexts.

TypeScript React patterns integrate directly with design systems through typed prop interfaces, CSS token references, and reusable component primitives. Apply Atomic Design principles with explicit typing, forwardRef support for ref forwarding, and generic components to build scalable, type-checked component libraries.

Accessible typed React components require proper ARIA attribute typing, semantic HTML element selection, and event handler types that support keyboard and pointer interactions. Enforce accessibility patterns through component prop types, ensuring focused components expose required ARIA attributes and keyboard behavior through typed interfaces.