An example about how to implement async, promise-based JS functionality.

Async JS Exercise

function logOne() {
    return new Promise((res) => {
        setTimeout(() => {
            console.log('one');
            res();
        }, Math.random() * 2000)
    })
}

function logTwo() {
    setTimeout(() => {
        console.log('two');
    }, Math.random() * 1000)
}

function inOrder(one, two) {
    one().then(() => {
        two();
    }) 
}
  
inOrder(logOne, logTwo);
  
// one
// two

// it should always log those two in order regardless of their timing