What does the useEffect hook do? code example
Example 1: useeffect react
useEffect(() => {
// code goes here
return () => {
// cleanup code codes here
};
},[]);
Example 2: useeffect react
useEffect(() => {
window.addEventListener('mousemove', () => {});
// returned function will be called on component unmount
return () => {
window.removeEventListener('mousemove', () => {})
}
}, [])
Example 3: react useeffect
import React, { useEffect } from 'react';
const [data,setData]=useState()
useEffect(() => {
fetch(`put your url/api request in here`)
.then(res=>res.json())
.then(json => setData(json))
},[])