/*doFirst(function(result) {
    doNext(result, function(newResult) {
      doLast(newResult, function(finalResult) {
        console.log('Got the final result: ' + finalResult);
      }, failureCallback);
    }, failureCallback);
  }, failureCallback);*/

  let Q = require('q');

  Q.when(null)
  .then(function doFirst(){
      return 'First passes to next';
  })
  .then(function doNext(val){
      console.log(val);
      return Q.when('Last');
  })
  .then(function doLast(val){
      console.log('Here we are at: ' + val);
  })
  .then(function(val){
    console.log(val==undefined);
  });

doFirst()
.then(result => doNext(result)
.then(nextResult => doLast(nextResult)
.then(val => console.log(val === undefined));

async lifecycleMethod() {
  const val = await doFirst();
  const nextVal = await doNext(val);
  const lastVal = await doLast(nextVal);
  return val === undefined;
}

const [val, nextVal, lastVal] = Promise.all([getVal(), getNextVal(), getLastVal()]);

getVal() {
  return new Promise(function(resolve,reject){
   const workDone = true; // some time consuming work
      if(workDone){
      //invoke resolve function passed

      resolve('success promise completed')
   }
   else{
      reject('ERROR , work could not be completed')
   }
  })
}
...doNext(val)

getVal()
.then(doNext)
.then(doLast)
.then(() => {
  console.log(val === undefined);
});
https://javascript.info/promise-chaining