does react use typescript or javascript code example

Example 1: React with Typescript

// to create a simple app with React and Typescript
npx create-react-app yourProjectName --template typescript

// to add Typescript in an existing project
npm install --save typescript @types/node @types/react @types/react-dom @types/jest

Example 2: why use typescript with react

npm install --save typescript @types/node @types/react @types/react-dom @types/jest