What are the best practices for using default props in React?

What are the best practices for using default props in React?

Using default props in React helps ensure that your components have default values. Here are some best practices:

1. Use default props for optional props to avoid undefined values.
2. Define default props directly on the component or use default parameters in function components.
3. Keep default values simple and relevant to the component's purpose.

Can you give an example of how to set default props?

Sure! Here's a simple example:

function Greeting({ name }) {
  return <h1>Hello, {name}!</h1>;
}

Greeting.defaultProps = {
  name: 'Guest',
};

In this example, if no name is provided, it defaults to 'Guest'.

What happens if I don't set default props?

If you don't set default props, the component will receive undefined for any props that are not provided. This can lead to errors or unexpected behavior in your component.

Are there any performance considerations with default props?

Generally, using default props has minimal performance impact. However, avoid complex calculations in default props, as they will run every time the component renders.