if-promise.js

//Original
const makeRequest = () => {
  return getJSON()
    .then(data => {
      if (data.needsAnotherRequest) {
        return makeAnotherRequest(data)
          .then(moreData => {
            console.log(moreData)
            return moreData
          })
      } else {
        console.log(data)
        return data
      }
    })
}

//Async
const makeRequest = async () => {
  const data = await getJSON()
  if (data.needsAnotherRequest) {
    const moreData = await makeAnotherRequest(data);
    console.log(moreData)
    return moreData
  } else {
    console.log(data)
    return data    
  }
}

//Mills:
const onResult = (data) => {
  return new Promise((resolve, reject) => {
    if(data.needsAnotherRequest) {
      makeAnotherRequest(resolve,reject); 
    } else {
      resolve(data)
    }
  }
}
                     
const makeRequest = () => {
     return getJSON()
       .then(onResult)
       .then(data => {
          console.log(data);  
       });
}