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              <a id="bloglink" href="http://hellote.com/dynamic-promise-chains/" target="_blank">Click to see related post</a>
<div id="output"></div>
<button onClick="doTheThing()">Do the thing</button>

            
          
!
            
              #bloglink {
  display: block;
  margin-bottom: 20px;
}
            
          
!
            
              // Helper function
function out(text) {
  var outputDiv = document.getElementById('output');
  outputDiv.innerText = text;
}

// Recurse on a given promise chain
function recurse(amount) {
  
  // Base case - just return the promise
  if (amount === 0) {
    return Promise.resolve(amount);
  }
  
  // Just to show that we're doing it for real
  out(amount - 1);
  
  // .delay is a Bluebird helper that is basically setTimeout
  // We call recurse() in the .then to add to the chain dynamically
  return Promise.delay(1000).then(function() {
    return recurse(amount - 1);
  })
}

function doTheThing() {
  Promise.resolve(10).then(recurse);
}

            
          
!
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