Promises and Async/Await in Java Script

  Promises and Async/Await in Java Script

Asynchronous programming is a technique for writing code that doesn't block the main thread and can perform multiple tasks simultaneously. JavaScript provides two features for asynchronous programming: Promises and Async/Await.

Promises are objects that represent the eventual completion or failure of an asynchronous operation. They can be used to chain multiple asynchronous operations together.

Here's an example of how to use a Promise to fetch data from a server:

javascript

fetch("https://api.example.com/data")

  .then(response => response.json())

  .then(data => console.log(data))

  .catch(error => console.error(error));

Async/Await is a syntax for writing asynchronous code that looks similar to synchronous code. It allows you to write code that appears to be executed in a linear, synchronous way, even though it's actually asynchronous.

Here's an example of how to use Async/Await to fetch data from a server:

javascript

async function fetchData() {

  try {

    const response = await fetch("https://api.example.com/data");

    const data = await response.json();

    console.log(data);

  } catch (error) {

    console.error(error);

  }

}