“Le composant montera les crochets” Réponses codées

comment utiliser composantDidMount dans la composante fonctionnelle

// passing an empty array as second argument triggers the callback in useEffect
// only after the initial render thus replicating `componentDidMount` lifecycle behaviour
useEffect(() => {
  if(!props.fetched) {
 	 props.fetchRules();
  }
  console.log('mount it!');
}, []);

// componentDidUpdate
useEffect({
	your code here
}) 

// For componentDidUpdate
useEffect(() => {
  // Your code here
}, [yourDependency]);

// For componentWillUnmount
useEffect(() => {
  // componentWillUnmount
  return () => {
     // Your code here
  }
}, [yourDependency]);
Salo Hopeless

Remplacez les composants avec des crochets

useEffect(() => {
	//will be called on every load
})

useEffect(() => {
	//will be called on component mount
  window.addEventListener('mousemove', () => {});

  // returned function will be called on component unmount 
  return () => {
    window.removeEventListener('mousemove', () => {})
  }
}, []) // <---- empty array at end will cause to only run on first load
Exuberant Eel

Composantwillunmount Crochets

useEffect(() => {
  window.addEventListener('mousemove', () => {});

  // returned function will be called on component unmount 
  return () => {
    window.removeEventListener('mousemove', () => {})
  }
}, [])
Agreeable Antelope

React Hook montera

const useComponentWillMount = (func: (params?: any) => any) => useMemo(func, []);
TindyC

Le composant montera les crochets

  useMemo(() => { }
    }, []);
Tough Toad

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