How to use shouldComponentUpdate with React Hooks?

Question

I\'ve been reading these links:
https://reactjs.org/docs/hooks-faq.html#how-do-i-implement-shouldcomponentupdate
https://reactjs.org/blog/2018/10/23/react-v-16-6.htm

Answer 1

Also you can use in export statement like:

export default memo(Modal, (prevState, nextState) => prevState.show === nextState.show) ;

Answer 2

Here is the documentation for React.memo

You can pass a function to control the comparison :

const Modal = React.memo(
  props => {...},
  (prevProps, nextProps) => prevProps.show === nextProps.show
);

when the function returns true, the component will not be re-rendered