How can I use type guards in React?

How can I use type guards in React?

Type guards in React help ensure that your components receive the correct types of props. You can use them to narrow down types at runtime.

Can you give me an example of a type guard in a functional component?

Sure! You can create a type guard function that checks if a prop is of a specific type, like this:

function isString(value: any): value is string {
  return typeof value === 'string';
}

Then use it in your component to validate props.

What if I have multiple types for a prop?

You can use a union type and create a type guard for each type. For example:

function isStringOrNumber(value: any): value is string | number {
  return typeof value === 'string' || typeof value === 'number';
}

Are there any libraries that can help with type guards?

Yes, libraries like io-ts or zod can help you create runtime type validation and guards more easily.