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>;react memo
function MyComponent(props) {
/* render using props */
}
function areEqual(prevProps, nextProps) {
/*
return true if passing nextProps to render would return
the same result as passing prevProps to render,
otherwise return false
*/
}
export default React.memo(MyComponent, areEqual);react.createElement
//Below I use the React.createElement() function to create a virtual DOM
//representation of a <li> element node containing a text node of one (a.k.a.,
//React text) and an id of li1.
var reactNodeLi = React.createElement('li', {id:'li1'}, 'one');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 */
});how to add react.memo in export list
export const MemoMainPostTopic = React.memo(MainPostTopic);
//or
const MainPostTopic = memo(() => {
...
})
export { MainPostTopic };Copyright © 2021 Codeinu
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