Choose the correct statements about the below code: const [name,setName]= useState('') const [age,setAge] = useState(0) useEffect(()=>{ console.log("useEffect method called") },[age]) useEffect will be called whenever name and age state changes useEffect is invoked once after initial render and then everytime when age state changes useEffect is invoked once once after initial render useEffect is not invoked
Question
Choose the correct statements about the below code:
const [name,setName]= useState('')
const [age,setAge] = useState(0)
useEffect(()=>{
console.log("useEffect method called")
},[age])
useEffect will be called whenever name and age state changes
useEffect is invoked once after initial render and then everytime when age state changes
useEffect is invoked once once after initial render
useEffect is not invoked
Solution
The correct statement about the given code is:
"useEffect is invoked once after initial render and then everytime when age state changes"
Explanation:
In the given code, useEffect is a hook in React that is used to perform side effects in function components. Side effects could be data fetching, subscriptions, or manually changing the DOM, etc.
The useEffect hook takes two arguments: a function and an array of dependencies. The function is the side effect that you want to run. The array of dependencies is the list of variables that the side effect depends on.
In this case, the dependency array includes only 'age'. This means the useEffect hook will run once after the initial render (because by default, it runs after every render), and then it will run again every time the 'age' state changes. It will not run when the 'name' state changes because 'name' is not included in the dependency array.
Similar Questions
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