IcaJS

promises.js

const mostrar = false
    const myPromise = new Promise((resolve, reject) => {
      setTimeout(() => {
        if (mostrar) {
          resolve('hello world!');
        } else {
          reject(Error('hello there!'));
        }
      }, 3000)
    });

    myPromise
      .then(response => { console.log(response) })
      .catch(error => { console.log(error) })

    const charlas = [
      { id: 1, tema: 'ES6'},
      { id: 2, tema: 'AWS Lambda con NodeJS' },
      { id: 3, tema: 'Promises' },
      { id: 4, tema: 'Firebase basics' }
    ]

    function getCharla(id) {
      return new Promise((resolve, reject) => {
        const charla = charlas.find(charla => charla.id === id)
        setTimeout(() => {
          if (charla) {
            resolve(charla)
          } else {
            reject(`Charla ${id} no encontrada`)
          }
        }, 2000)
      })
    }
    getCharla(10)
      .then(response => {console.log(response) })
      .catch(error => { console.error(error.toUpperCase()) })

    // SWAPI
    const people = fetch('https://swapi.co/api/people')
    const people2 = fetch('https://swapi.co/api/people/?page=2')

    Promise
      .all([people, people2])
      .then(responses => Promise.all(responses.map(res => res.json())))
      .then(responses => {
        results = responses.map(({ results }) => results)
        allPeople = [].concat(...results)
        console.log(allPeople)
      })