useEffect(()=>{ console.log(‘hello’)},[state1,state2]])Which statement is true for the above code?
Question
useEffect(()=>{ console.log(‘hello’)},[state1,state2]])Which statement is true for the above code?
Solution
The statement is written in JavaScript, specifically using React Hooks. The useEffect hook is used to perform side effects in function components.
Here's a step-by-step breakdown of the code:
-
useEffectis a function that takes two arguments: a function and an array. -
The function
() => { console.log('hello') }is the first argument touseEffect. This function will be executed after the render is committed to the screen. -
The array
[state1, state2]is the second argument touseEffect. This is the dependency array.
The true statement for the above code is:
"The console will log 'hello' every time either state1 or state2 changes. If neither state1 nor state2 changes between renders, the function will not be executed."
Similar Questions
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What is the syntax for the useEffect() hook in React, when you want to run a function inside the useEffect only when the app loads?AuseEffect(() => {}, []);BuseEffect(() => {}, [stateVariable]);CuseEffect(() => {});DAll of the above
Consider the below code snippet:function Sample() { const [name,setName] = useState("Jack") const [age,setAge] = useState(20) useEffect(()=>{ console.log("use Effect called") },[age]) return ( <div> <h1>Your Name is: {name}</h1><br/> <h1>Your Age is: {age} </h1><br/> <button onClick={()=>setName("Tom")}>Change Name</button> <button onClick={()=>setAge(age+1)}>Change Age</button> </div> );}How many times the "use Effect called" will be logged to the console when the change Name button and Change Age button is clicked 3 times each?6745
The useEffect() method will run whenever any state of the component changes, when there is no second argument passed to it. Please validate the above statement. True False
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