react hook component unmount code example
Example 1: component unmount hooks
useEffect(() => {
window.addEventListener('mousemove', () => {});
// returned function will be called on component unmount
return () => {
window.removeEventListener('mousemove', () => {})
}
}, [])
Example 2: useeffect with cleanup
useEffect(() => {
//your code goes here
return () => {
//your cleanup code codes here
};
},[]);
Example 3: useeffect react
useEffect(() => {
// code goes here
return () => {
// cleanup code codes here
};
},[]);
Example 4: useeffect
import React, { useState, useEffect } from 'react';
function Example() {
const [count, setCount] = useState(0);
useEffect(() => { document.title = `You clicked ${count} times`; });
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}