React memo

React forwardref

const FancyButton = React.forwardRef((props, ref) => (
  <button ref={ref} className="FancyButton">
    {props.children}
  </button>
));

// You can now get a ref directly to the DOM button:
const ref = React.createRef();
<FancyButton ref={ref}>Click me!</FancyButton>;

Source: reactjs.org

React memo

/* this is for es6 onward */
/* React.memo is the new PureComponent */

import React, { memo } from 'react'

const MyComponent = () => {
 return <>something</>
}

export default memo(MyComponent)

Import React, { memo } from 'react';

const MyComponent = React.memo(function MyComponent(props) {
  /* only rerenders if props change */
});

Source: reactjs.org

How to add react.memo in export list

export const MemoMainPostTopic = React.memo(MainPostTopic);
 

//or

const MainPostTopic = memo(() => {
 ...
})
export { MainPostTopic };

Source: stackoverflow.com

Similar codes

16 votes265 views3 answers
Start react native
Javascript React
1 vote243 views2 answers
Switch is not exported from react-router-dom
Javascript React
0 vote265 views1 answer
Websocket with Node and React
Javascript React
1 vote258 views1 answer
How to know react and react-native version
Javascript React
0 vote225 views1 answer
React Mixed symbols
Javascript React
0 vote232 views1 answer
Event handling in react documentation
Javascript React
0 vote267 views1 answer
React native cli sdk.dir
Javascript React
-2 votes275 views1 answer
React native generate signed apk getting older version
Javascript React
1 vote262 views1 answer
React stripe npm
Javascript React
0 vote241 views1 answer
React 10 to 1 with step -2 (odd numbers between [1..10] inverted order)
Javascript React