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| const Child = React.memo( | |
| ({ isAboveFive, children }) => { | |
| console.log("child renders"); | |
| return ( | |
| <> | |
| <h2>Child: {!isAboveFive ? "<= 5" : "> 5"}</h2> | |
| {children} | |
| </> | |
| ); | |
| }, |
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| const App = () => { | |
| const [counter, setCounter] = useState(0); | |
| const [aboveFive, setAboveFive] = useState(false); | |
| const increment = () => { | |
| setCounter(n => n + 1); | |
| }; | |
| useEffect(() => { | |
| if (counter > 5) { |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| const App = () => { | |
| const [counter, setCounter] = useState(0); | |
| const [aboveFive, setAboveFive] = useState(false); | |
| const increment = useCallback(() => { | |
| setCounter(n => n + 1); | |
| }, []); | |
| useEffect(() => { | |
| if (counter > 5) { |
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