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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Async Dislogs Example</title>
  <script src="//cdn.jsdelivr.net/bluebird/3.0.5/bluebird.js"></script>
  <script type="text/javascript">
    document.addEventListener('DOMContentLoaded', function() {
      var time = document.getElementById('time-stamp');
      clockTick();
      setInterval(clockTick, 1000);
      function clockTick() {
        time.innerHTML = '' + new Date();
      }
    });
  </script>
</head>
<body>
  <p>The current time is <span id="time-stamp"></span>.</p>
  <p>Your name is <span id="prompt"></span>.</p>
  <button id="action">Set Name</button>
</body>
</html>
 
function promptPromise(message) {
  return new Promise(function(resolve, reject) {
    var result = window.prompt(message);
    if (result != null) {
      resolve(result);
    } else {
      reject();
    }
  });
}
​
document.addEventListener('DOMContentLoaded', function() {
  var button = document.getElementById('action');
  var output = document.getElementById('prompt');
​
  button.addEventListener('click', function() {
    promptPromise('What is your name?')
      .then(function(name) {
        output.innerHTML = '' + name;
      })
      .catch(function() {
        output.innerHTML = '¯\\_(ツ)_/¯';
      });
  });
});
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