Promise Chaining Example 1

promiseChain1

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)

getPost() // #1.fetch post
.then(postResponse => postResponse.json()) // #2. get & return post json 
.then(postResponse => getAuthor(postResponse.id) // #3. fetch author
  .then(authorResponse => authorResponse.json()  // #4 get & return author json
    .then(authorResponse => getComment(postResponse.id) // #5 fetch comment
      .then(commentResponse => commentResponse.json()) // #6 get & return comment json
      .then(commentResponse => {  // #7 time to combine all results
          return ({postResponse,authorResponse,commentResponse}) // #8 combine & return all reponses
        })
    )
  )
  .then(results => { // #9 read all responses
    console.log(results.postResponse)
    console.log(results.authorResponse)
    console.log(results.commentResponse)

  }) 
)
.catch(error => console.log(error)) //# 10 error handling

nice. but i still understand

https://medium.com/coderupa/panduan-komplit-asynchronous-programming-pada-javascript-part-3-promise-819ce5d8b3c?source=collection_home---4------9-----------------------