Difference of using async / await vs promises?

Question

I am looking for a answer on what to use in my nodeJS app.

I have code which handles my generic dB access to mssql. This code is written using an async

Answer 1

Its depending upon what approach you are good with, both promise and async/await are good, but if you want to write asynchronous code, using synchronous code structure you should use async/await approach.Like following example, a function return user with both Promise or async/await style. if we use Promise:

function getFirstUser() {
    return getUsers().then(function(users) {
        return users[0].name;
    }).catch(function(err) {
        return {
          name: 'default user'
        };
    });
}

if we use aysnc/await

async function getFirstUser() {
    try {
        let users = await getUsers();
        return users[0].name;
    } catch (err) {
        return {
            name: 'default user'
        };
    }
}

Here in promise approach we need a thenable structure to follow and in async/await approach we use 'await' to hold execution of asynchronous function.

you can checkout this link for more clarity Visit https://medium.com/@bluepnume/learn-about-promises-before-you-start-using-async-await-eb148164a9c8