What is the difference between React.memo and PureComponent?

What is the difference between React.memo and PureComponent?

React.memo is a higher-order component that memoizes the result of a functional component, preventing unnecessary re-renders. PureComponent, on the other hand, is a base class for class components that implements a shallow comparison of props and state.

When should I use React.memo instead of PureComponent?

Use React.memo for functional components where you want to optimize rendering. Use PureComponent for class components when you want to avoid re-renders based on shallow prop/state comparison.

Can you give an example of when to use each?

Sure! Use React.memo for a functional component that receives props that rarely change. Use PureComponent for a class component that has complex state management but only needs to re-render when specific props change.

Are there any performance differences between the two?

Yes, React.memo can be more performant for functional components, especially with complex props. PureComponent can be beneficial for class components but may not always yield significant performance gains.