How do I use promises in a Node.js application?

How do I use promises in a Node.js application?

Promises are used in Node.js to handle asynchronous operations. You can create a promise using the Promise constructor.

Can you show me a simple example of a promise?

Sure! Here's a basic example:

const myPromise = new Promise((resolve, reject) => {
    const success = true;
    if (success) {
        resolve('Operation was successful!');
    } else {
        reject('Operation failed.');
    }
});

myPromise.then(result => {
    console.log(result);
}).catch(error => {
    console.error(error);
});

What are the benefits of using promises over callbacks?

Promises help avoid callback hell, making code easier to read and maintain. They also provide better error handling.

Can I chain multiple promises together?

Yes! You can chain promises using the .then() method, allowing you to perform sequential asynchronous operations.