make-before-await.js

const delay = (ms) => new Promise(resolve => setTimeout(resolve, ms));

const fn = (ms) => delay(ms).then(() => console.log('done after ' + ms));

// Sequential
async function test1() {
    const [one, two] = [await fn(2000), await fn(1000)];
    console.log('mikael1 finished');
}

// Parallel
async function test2() {
    const [one, two] = await Promise.all([fn(2000), fn(1000)]);
    console.log('mikael2 finished');
}

// Also parallel
async function test3() {
    const [prom1, prom2] = [fn(2000), fn(1000)];
    const [one, two] = [await prom1, await prom2];
    console.log('joey1 finished');
}

Promise.resolve().then(test1).then(test2).then(test3).catch(console.error);