Promise-vs-await.js

function x(name) {
    console.log(">x: ", name);
    return new Promise(function (resolve, reject) {
        setTimeout(() => {
            console.log("<x: ", name);
            resolve(name);
        }, 5000);
    });
}

function y(name) {
    console.log(">y: ", name);
    return new Promise(function (resolve, reject) {
        setTimeout(() => {
            console.log("<y: ", name);
            resolve(name);
        }, 2000);
    });
}

async function rob() {
    console.log('>rob')
    a = await x('rob');
    b = await y(a);
    console.log('<rob')
    return b;
}

function roustem() {
    console.log('>roustem');
    let result = x('roustem').then(value => y(value));
    console.log('<roustem');
    return result;
}

rob();
roustem();