Which of the following is a valid way to use theuseEffect()hook to fetch data from an API?AuseEffect(() => { const fetchData = async () => { const response = await fetch('https://api.example.com'); const data = await response.json(); setData(data); }; fetchData();}, []);BuseEffect(() => { fetch('https://api.example.com') .then(response => response.json()) .then(data => setData(data));}, []);CBoth a and bDNeither a nor b
Question
Which of the following is a valid way to use theuseEffect()hook to fetch data from an API?AuseEffect(() => { const fetchData = async () => { const response = await fetch('https://api.example.com'); const data = await response.json(); setData(data); }; fetchData();}, []);BuseEffect(() => { fetch('https://api.example.com') .then(response => response.json()) .then(data => setData(data));}, []);CBoth a and bDNeither a nor b
Solution
The correct answer is C. Both A and B are valid ways to use the useEffect() hook to fetch data from an API in React.
Option A uses the async/await syntax to fetch data. It first defines an async function fetchData() inside the useEffect hook. This function fetches data from the API and then uses the setData function to update the state with the fetched data.
Option B uses the .then() syntax to fetch data. It directly fetches data from the API inside the useEffect hook and then uses the .then() method to handle the Promise returned by fetch(). It then uses the setData function to update the state with the fetched data.
Both these methods are valid and can be used based on your preference or the specific requirements of your project.
Similar Questions
Which of the following is an example of using the useEffect() hook to build a loader in a React component?AuseEffect(() => { setLoading(true); fetch('https://example.com/data') .then(res => res.json()) .then(data => { setData(data); setLoading(false); });}, []);BuseEffect(() => { setIsLoading(true); fetch('https://example.com/data') .then(res => res.json()) .then(data => { setData(data); setIsLoading(false); });}, []);CuseEffect(() => { setIsLoaded(false); fetch('https://example.com/data') .then(res => res.json()) .then(data => { setData(data); setIsLoaded(true); });}, []);DuseEffect(() => { setLoading(true); fetch('https://example.com/data') .then(res => res.json()) .then(data => { setData(data); setLoading(false); });}, [data]);
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
What is the purpose of the useEffect hook in React? a. To manage component state b. To create reusable logic in functional components c. To define the initial state of a component d. To handle side effects in functional components
What does the useEffect hook do without a dependency array?
Which of the following code subscribes to the user in useEffect and then signout him in useEffect cleanup?AuseEffect(() => { // set our variable to true let isSubscribed = true; get(API).then((response) => { if (isSubscribed) { // handle success } }); return () => { // cancel the subscription isSubscribed = false; };}, []);BuseEffect(() => { // set our variable to true let isSubscribed = true; get(API).then((response) => { if (isSubscribed) { // handle success } }); return () => { // cancel the subscription isSubscribed = true; };}, []);CuseEffect(() => { // set our variable to true let isSubscribed = true; get(API).then((response) => { if (isSubscribed) { // handle success } });}, []);DuseEffect(() => { // set our variable to true let isSubscribed = true; if (!isSubscribed) { // handle success } return () => { // cancel the subscription isSubscribed = true; };}, []);
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