How do asynchronous functions work in JavaScript?

How do asynchronous functions work in JavaScript?

Asynchronous functions in JavaScript allow you to perform tasks without blocking the main thread. They enable non-blocking code execution.

Can you give me an example of an asynchronous function?

Sure! Here's a simple example using the fetch API to get data from a URL:

async function getData(url) {
    const response = await fetch(url);
    const data = await response.json();
    return data;
}

What happens if I don't use 'await' in an async function?

If you don't use 'await', the function will return a promise immediately, and the code following the asynchronous call will execute without waiting for the promise to resolve.

How can I handle errors in asynchronous functions?

You can handle errors using try-catch blocks within async functions. For example:

async function fetchData() {
    try {
        const data = await getData('url');
    } catch (error) {
        console.error('Error fetching data:', error);
    }
}