example_promise.js

const fetch = require('node-fetch');
const defer = new Promise((resolve, reject) => {
    setTimeout(() => {
        if (true) {
            resolve('Hello! It works!');
        } else {
            reject('Error');
        }
    }, 2000);
});
defer.then(data => console.log(data));

const posts = async function getPosts() {
    try {
        const response = await fetch('https://willianjusten.com.br/search.json');
        const data = await response.json();
        return data.map(post => {
            console.log(post.title);
        });
    } catch (err) {
        console.error('Noooooo, we got an error!', err);        
    }
}
posts();

async function getUsers(users) {
    const promise = users.map(user => fetch(`https://api.github.com/users/${user}`).then(r => r.json()));
    
    const people = await Promise.all(promise);
    console.log(people.map(p => p.company))
}
getUsers(['willianjusten', 'guilouro', 'lhbzr'])