Best practices & advanced TypeScript tips for React devs

Learn to compile and type check TypeScript in React apps using tsc, with compile and watch commands, plus pre-commit hooks to catch errors early.

Learn how to convert JavaScript React components to TypeScript by typing props with interfaces or types, renaming to .tsx, and using functional components or React FC with proper return types.

Define mutually exclusive props for a component in TypeScript by requiring either a message or a message ID, not both, and use never types to enforce the rule.

Enable TypeScript strict mode and no unchecked index access to catch runtime errors, illustrated with a pizza order demo using coalescing and explicit error handling.

Validate data at the application boundary using schemas to ensure runtime shapes match expectations, catching errors from rest endpoints before rendering, and plan to infer TypeScript types from schemas later.

Learn to infer TypeScript types for functions using generics, keyof, and type extraction from configuration objects, providing compile-time validation and safer runtime access.

Explore building generic React form components with TypeScript by typing generic props and values to match initial values and submissions, enforcing type safety and preventing undefined values.

Derive component prop types from existing components by inferring prop definitions via React's component props, enabling reusable, generic type mappings for inputs and checkboxes.

Infer TypeScript types directly from Zod schemas to keep runtime validation and compile-time types in sync, avoid duplication, and align pizza schemas.

Explore TypeScript type mappings with Omit and Pick to create new types from existing ones, using conditional logic to include or omit properties and keep data in sync.

Explore the read only type in TypeScript, how it prevents mutations, its non-recursive nature, and how to catch bugs with compile-time checks in React apps.

Master recursive type mappings in TypeScript by creating a deep read-only type to make nested data immutable and detect mutations at compile time.

Explore how to display complex TypeScript mapped types using a resolve type mapping to improve readability in hover tooltips and error messages, while preserving read-only properties.

Explore type predicate functions in TypeScript to achieve both compile-time and runtime type safety by guarding items on sale such as books, magazines, and pens.

Learn type assertion functions and how they differ from type predicate functions, throwing runtime errors to enforce types and simplify code in TypeScript for React developers.

Master exhaustive checking in TypeScript by covering all union cases with switches and the never type, while enforcing runtime safety with assert never.

Explore end-of-course highlights: map types, TypeScript types, and flexible React components with complex props. Emphasize exhaustive checks and runtime type validations at the boundary.