Async - the bad

async2.js

function asyncWorker() {
    return new Promise( (resolve, reject) => {
        setTimeout(resolve, 2000);
    });
}


function main() {

    callback = () => {
        console.debug('callback !');
    }

    console.debug('Started');
    asyncWorker().then(callback);
    console.debug('Ended');
}

main();