Async/Await is a syntax feature that simplifies asynchronous programming in JavaScript. It allows you to write asynchronous code that looks and behaves like synchronous code, making it easier to read and maintain.
What is Async/Await?
Async/Await is a way to write asynchronous code using the async and await keywords. The async keyword is used to declare an asynchronous function, and the await keyword is used to pause the execution of the function until a Promise is resolved.
Why Use Async/Await?
- Simpler Syntax: Async/Await makes asynchronous code easier to read and write.
- Improved Error Handling: It provides a more intuitive way to handle errors.
- Better Performance: It can improve the performance of your application by reducing the overhead of callbacks.
Getting Started
To use Async/Await, you need to declare a function with the async keyword. Here's an example:
async function fetchData() {
const data = await fetch('/api/data');
return data.json();
}
In this example, the fetchData function is asynchronous. The await keyword is used to wait for the fetch call to complete and return the data.
Example Usage
Here's an example of how you can use Async/Await to fetch data from an API and display it:
async function displayData() {
const data = await fetchData();
console.log(data);
}
displayData();
In this example, the displayData function is called, which in turn calls the fetchData function. The await keyword ensures that the fetchData function completes before the displayData function continues.
Resources
For more information on Async/Await, you can read the official documentation.