What are union types in TypeScript and how can I use them in React?

What are union types in TypeScript and how can I use them in React?

Union types in TypeScript allow you to define a variable that can hold multiple types. For example, you can define a prop that can be either a string or a number.

Can you give me an example of how to implement union types in a React component?

Sure! Here's a simple example:

interface MyComponentProps {
  value: string | number;
}

const MyComponent: React.FC<MyComponentProps> = ({ value }) => {
  return <div>{value}</div>;
};

This component accepts a prop value that can be either a string or a number.

What happens if I pass a boolean to that component?

If you pass a boolean, TypeScript will throw a type error because boolean is not part of the defined union type for value.

Are there any best practices for using union types in TypeScript?

Yes! It's best to keep your union types simple and clear. Avoid overly complex unions, and consider using type guards to handle different types safely.