Javascript settimeout in promise chain

Javascript settimeout in promise chain.js

// example code for blog post
// https://stackfame.com/javascript-settimeout-promise-chain
makeHttpCall("https://api.stackfame.com/1")
  .then(function(data) {
    return makeHttpCall("https://api.stackfame.com/2");
  })
  .then(function(data) {
    return loadScript("https://api.stackfame.com/3");
  })
  .then(function(data) {
    // do something useful with data
  });

makeHttpCall("https://api.stackfame.com/1")
  // add delay here
  .then(function(data) {
    return makeHttpCall("https://api.stackfame.com/2");
  })
  // add delay here
  .then(function(data) {
    return loadScript("https://api.stackfame.com/3");
  })
  .then(function(data) {
    // do something useful with data
  });

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

makeHttpCall("https://api.stackfame.com/1")
  // add delay here
  .then(delay(10000))
  .then(function(data) {
    return makeHttpCall("https://api.stackfame.com/2");
  })
  // add delay here
  .then(delay(5000))
  .then(function(data) {
    return loadScript("https://api.stackfame.com/3");
  })
  .then(function(data) {
    // do something useful with data
  });

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

//   using es6 arrow functions
makeHttpCall("https://api.stackfame.com/1")
  // add delay here
  .then(delay(4000))
  .then(data => makeHttpCall("https://api.stackfame.com/2"))
  // add delay here
  .then(delay(2000))
  .then(data => loadScript("https://api.stackfame.com/3"))
  .then(
    data => console.log(data)
    //do something useful with data
  );

Promise.prototype.delay = time =>
  new Promise(resolve => setTimeout(resolve, time));

makeHttpCall("https://api.stackfame.com/1")
  // add delay here
  .delay(4000)
  .then(data => makeHttpCall("https://api.stackfame.com/2"))
  // add delay here
  .delay(5000)
  .then(data => loadScript("https://api.stackfame.com/3"))
  .then(
    data => console.log(data)
    //do something useful with data
  );

Blog post link: https://stackfame.com/javascript-settimeout-promise-chain