Edit in JSFiddle

Promise.resolve()
  .then(()=>{
    log('onFulfilled1 returns some value');
    return 'returned from onFulfilled1';
  })
  .then((value)=>{
    log('onFulfilled2 got value:', value);
  });

function log(...strings){
  let node = document.createElement('div');
  node.innerText = strings.join(' ');
  document.getElementById('log').appendChild(node);
}