Mastering TypeScript with React: Best Practices

Why TypeScript with React?

TypeScript adds static type checking to React, catching errors at compile time rather than runtime. This leads to more robust applications and better developer experience.

Basic Types

Props Typing

`typescript interface ButtonProps { variant: 'primary' | 'secondary' | 'outline' size?: 'sm' | 'md' | 'lg' children: React.ReactNode onClick?: () => void disabled?: boolean }

function Button({ variant, size = 'md', children, onClick, disabled }: ButtonProps) { // Component logic } `

State Typing

`typescript type User = { id: string name: string email: string role: 'admin' | 'user' }

const [users, setUsers] = useState([]) `

Advanced Patterns

Generic Components

`typescript function List({ items, render }: { items: T[] render: (item: T) => React.ReactNode }) { return

{items.map(render)}

} `

Discriminated Unions for State

`typescript type RequestState = | { status: 'idle' } | { status: 'loading' } | { status: 'success'; data: T } | { status: 'error'; error: Error } `

Type Safety Best Practices

1. Avoid any - use unknown when type is uncertain 2. Prefer interfaces for object shapes 3. Use type guards for runtime checking 4. Leverage satisfies operator for validation

Conclusion

TypeScript integration with React provides immense value for project scalability and maintainability. Start with basic patterns and gradually adopt advanced features as your team's confidence grows.