gistfile1.js

function methodThatCleansUpStuff(){
  // dont return anything cause you are just cleaning up
}

function doAsyncStuff() {
  return methodThatGivesAPromise()
    .then(otherMethodThatGivesAPromise)
    .then(()=>{throw new Error(“BOOM”)})
    .then(otherOtherMethodThatGivesAPromise)
    .catch(methodThatCleansUpStuff)
}

doAsyncStuff().then(()=>{
  console.log('promise was resolved!!')
})
.fail(()=>{
  console.log('promise was rejected!!')
})
   
// this prints 'promise was resolved!!'