Monitor for DOM changes

[G0dwin]

This would probably be better inside a Rails specific package but it would be nice to look for DOM changes, particularly after Ajax calls. If we were to create a marmara-rails package, we could inject JS code into each page that would call an endpoint to initiate a record call. We could monitor for AJAX calls using:

(function() {
  var requestOpen = XMLHttpRequest.prototype.open;
  XMLHttpRequest.prototype.open = function() {
    this.addEventListener('load', function() {
      if (this.readyState === 4) {
        if (this.responseText !== 'marmara-ok') {
          // make an AJAX call to our '/__marmara_record' endpoint which will call Marmara.record and return 'marmara-ok';
        }
      }
    });
    requestOpen.apply(this, arguments);
  };
})();