component did mount hooks code example
Example 1: componentdidmount hooks
For componentDidMount
useEffect(() => {
}, []);
For componentDidUpdate
useEffect(() => {
}, [yourDependency]);
For componentWillUnmount
useEffect(() => {
return () => {
}
}, [yourDependency]);
Example 2: useeffect umnount
useEffect(() => {
return () => {
console.log("cleaned up");
};
}, []);
Example 3: react hooks componentdidmount
useEffect(() => {
}, []);
Example 4: useeffect
function App() {
const [count, setCount] = useState(0);
useEffect(() => {
longResolve().then(() => {
alert(count);
});
}, []);
return (
<div>
<button
onClick={() => {
setCount(count + 1);
}}
>
Count: {count}
</button>
</div>
);
}
Example 5: useeffect react
useEffect(() => {
window.addEventListener('mousemove', () => {});
return () => {
window.removeEventListener('mousemove', () => {})
}
}, [])
Example 6: 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))
},[])