typescript-cheatsheets/react

React TypeScript Cheatsheet is a practical reference guide for developers who already know React and want to start using it with TypeScript, or who are working in a TypeScript React codebase and keep running into confusing type-related questions. TypeScript is a version of JavaScript that adds type annotations, declarations of what kind of data a variable or function parameter is supposed to hold. When combined with React, TypeScript helps catch mistakes early, improves editor autocompletion, and makes large codebases easier to navigate, but the combination introduces a learning curve full of common stumbling points. The guide is divided into sections for different experience levels and scenarios. The Basic Cheatsheet focuses on getting a React developer productive with TypeScript quickly: how to type function components and their props, how to add types to the most common hooks like useState and useRef, how to handle form events, and how to avoid common pitfalls. The Advanced Cheatsheet covers more complex patterns needed when writing shared component libraries: generics, higher-order components, render props, and type utilities. There is also a Migrating section with advice for converting an existing JavaScript React codebase to TypeScript incrementally, and a HOC (higher-order component) section. Each section provides copy-pasteable code examples alongside brief explanations of why a particular pattern is recommended. The cheatsheet also includes a troubleshooting handbook for the TypeScript error messages that confuse React developers most often. You would use this when starting TypeScript in a React project for the first time, when encountering an unfamiliar TypeScript error in React code, or when looking for the accepted pattern for a specific React+TypeScript use case without wanting to read through TypeScript's full documentation.