TypeScript Patterns

Master TypeScript in React and React Router v7 applications. Learn how to create type-safe loaders, actions, components, and leverage TypeScript's power for better DX.

Quick Reference

Type-Safe Loader

export async function loader({ params }: LoaderFunctionArgs) {
  const user = await fetchUser(params.userId);
  return { user };
}

// In component
const { user } = useLoaderData<typeof loader>();

Type-Safe Action