Promise Chain Example 2

promiseChain2

const getPost = () => fetch('https://jsonplaceholder.typicode.com/posts/1')
const getAuthor = (id) => fetch('https://jsonplaceholder.typicode.com/users/' + id)
const getComment = (id) => fetch('https://jsonplaceholder.typicode.com/users/' + id)

var a = getPost().then(res => res.json()) // #1 get post
var b = a.then(res => getAuthor(res.id)).then(res => res.json()) // #2 get author
var c = a.then(res => getComment(res.id)).then(res => res.json()) //#3 get comment
Promise.all([a,b,c]).then(results => {
  console.log(results[0])
  console.log(results[1])
  console.log(results[2])
})