const handleSubmit = (e) => { e.preventDefault(); const userData = { username, email, password }; fetch('http://localhost:8080/signup', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify(userData), }) .then((response) => { if (!response.ok) { throw new Error('Network response was not ok'); } return response.json(); }) .then((data) => { console.log('Success:', data); }) .catch((error) => { console.error('Error:', error); }); };
Question
const handleSubmit = (e) => { e.preventDefault(); const userData = { username, email, password }; fetch('http://localhost:8080/signup', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify(userData), }) .then((response) => { if (!response.ok) { throw new Error('Network response was not ok'); } return response.json(); }) .then((data) => { console.log('Success:', data); }) .catch((error) => { console.error('Error:', error); }); };
Solution
This is a JavaScript function named handleSubmit. It is an arrow function that takes an event e as a parameter. Here's a step-by-step explanation of what this function does:
-
e.preventDefault();: This line prevents the default action of the event from happening. In this case, it prevents the form from being submitted in the traditional way, which would cause a page reload. -
const userData = { username, email, password };: This line creates a new objectuserDatawith the propertiesusername,email, andpassword. The values of these properties are taken from the variablesusername,email, andpasswordthat should be defined somewhere in the scope accessible to this function. -
fetch('http://localhost:8080/signup', {...}): This line
Similar Questions
.then((response) => { if (!response.ok) { throw new Error('Network response was not ok'); } return response.json(); }) .then((data) => { console.log('Success:', data); }) .catch((error) => { console.error('Error:', error); }); };
Which of the following is a preferrable way to send a GET request in react?Aconst App = () => {const fetchHandler = () => { fetch('randomapi').then(res => {console.log(res)}) }fetchHandler();return <div></div>}Bconst fetchHandler = () => { fetch('randomapi').then(res => {console.log(res)}) }const App = () => {fetchHandler();return <div></div>}Cconst App = () => {useEffect(() => {const fetchHandler = () => { fetch('randomapi').then(res => {console.log(res)}) }fetchHandler();}, []);return <div></div>}DNone of the above
Which of the following is an appropriate way of sending POST request in react and printing the response on console?Aconst App = () => {const [body, setBody] = useState([]);const postHandler = () => { fetch('http://api.com', {method: 'POST', body: body}) .then(res => console.log(res))}return <button onClick={postHandler}> Click</button>}Bconst App = () => {const [body, setBody] = useState([]);const postHandler = () => { fetch('http://api.com') .then(res => console.log(res))}return <button onClick={postHandler}> Click</button>}Cconst App = () => {const [body, setBody] = useState([]);const postHandler = () => { fetch('http://api.com') .then( console.log(res))}return <button onClick={postHandler}> Click</button>}DNone of the above
10.Question 10How can a function fetchData be implemented in JavaScript to fetch data from a remote server using an asynchronous API call that takes a URL and returns a promise that resolves with the fetched data or rejects with an error message if the request fails?1 pointfunction fetchData(url) {<br> return fetch(url).then(response => {<br> if (!response.ok) {<br> throw new Error("Request failed.");<br> }<br><br> return response.json();<br> });<br>}function fetchData(url) {<br> return fetch(url).then(response => {<br> if (response.status !== 200) {<br> throw new Error("Request failed.");<br> }<br><br> return response.json();<br> });<br>}function fetchData(url) {<br> return fetch(url).then(response => {<br> if (response.ok) {<br> return response.json();<br> } else {<br> throw new Error("Request failed.");<br> }<br> });<br>}function fetchData(url) {<br> return fetch(url).then(response => {<br> if (response.status === 200) {<br> return response.json();<br> } else {<br> throw new Error("Request failed.");<br> }<br> });<br>}
fetch() returns a Promise that resolves to the Response to that request, whether it is successful or not.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.