Asynchronous Programming in JS

 Asynchronous Programming in JS

Asynchronous programming is a programming paradigm that allows code to run concurrently, rather than in a linear fashion. This can improve the performance and responsiveness of applications, especially when working with I/O operations or network requests.

Here is an example of using async/await syntax to handle asynchronous code:

async function fetchUserData(userId) {

  const response = await fetch(`https://jsonplaceholder.typicode.com/users/${userId}`);

  const user = await response.json();

  const postsResponse = await fetch(`https://jsonplaceholder.typicode.com/posts?userId=${userId}`);

  const posts = await postsResponse.json();

  return { user, posts };

}

fetchUserData(1)

  .then(data => console.log(data))

  .catch(err => console.error(err));

In this example, we use the async/await syntax to make two network requests in parallel and then combine the responses into a single object.