Javascript Async/await

JavaScript async/await is a way to write asynchronous code that is easier to read and write compared to using callbacks or promises. Async/await is built on top of promises and provides a way to write asynchronous code that looks and behaves like synchronous code.

The async keyword is used to define an asynchronous function, which returns a promise. Inside an async function, you can use the await keyword to wait for a promise to resolve before continuing with the code execution.

Syntax:

async function myAsyncFunction() {
  // async code here
}

And here’s an example of an async function that fetches data from an API and returns the result as a JSON object:

async function fetchData() {
  const response = await fetch('https://jsonplaceholder.typicode.com/todos/1');
  const data = await response.json();
  return data;
}

fetchData().then(data => {
  console.log(data);
}).catch(error => {
  console.error(error);
});

In the example above, the fetchData function is defined as an async function using the async keyword. Inside the function, we use the await keyword to wait for the fetch API to return a response, and then we use another await keyword to wait for the response to be parsed as JSON.

The fetchData function returns a promise that resolves to the data fetched from the API. We use the .then() method to handle the successful resolution of the promise and log the data to the console. We also use the .catch() method to handle any errors that might occur during the fetching process.

Async/await is a powerful feature of JavaScript that makes it easier to write asynchronous code that is easy to read and maintain. It allows you to write code that looks and behaves like synchronous code, but still performs asynchronous tasks in the background.

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