title: Use zone.js inside node (not angular)
body: <p>I would like to use zone.js in my node app.</p>
  
  <p>Although I have found a <a href="https://stackoverflow.com/questions/39563213/using-zone-js-hooks-in-node">post</a> in which is described how to do this, I still get <code>zone</code> is not defined error</p>
  
  <p>For example. I also found an examples likt this</p>
  
  <pre><code>let zone = require('zone');
  
  zone.run(function () {
      zone.inTheZone = true;
  
     setTimeout(function () {
         console.log('in the zone: ' + !!zone.inTheZone);
     }, 0);
  });
  </code></pre>
  
  <p>Which gives the same error, but I inspected the <code>zone</code> object, I noticed that it returns an object like this</p>
  
  <pre><code>{
      enable: function() { .. }
  }
  </code></pre>
  
  <p>So I guess that the zone API changed. Any help would be appreciated</p>