How can I use TypeScript with custom hooks in React?

How can I use TypeScript with custom hooks in React?

You can use TypeScript with custom hooks by defining the types for your hook's parameters and return values. This ensures type safety.

Can you show me an example of a custom hook in TypeScript?

Sure! Here's a simple example:

import { useState } from 'react';

function useCounter(initialValue: number = 0) {
    const [count, setCount] = useState(initialValue);
    const increment = () => setCount(c => c + 1);
    const decrement = () => setCount(c => c - 1);
    return { count, increment, decrement };
}

This hook manages a counter state.

What are the benefits of using TypeScript with React hooks?

Using TypeScript with React hooks provides better type safety, improved code readability, and enhanced developer experience through autocompletion and error checking.

Are there any common pitfalls to avoid when using TypeScript with custom hooks?

Yes, some common pitfalls include not properly typing the hook's return value, which can lead to runtime errors, and forgetting to handle dependencies in useEffect.