Callback for visitWebPage?

[Anonymous]

I want to execute some JavaScript after Marketo makes its call to visitWebPage. Is there a callback for this function or an event I can detect? Can this be done on a Marketo-hosted landing page?

[Anonymous]

I have the same question.

[SanfordWhiteman]

There's no builtin hitCallback as there is with GA.  My "Munchkin Enhanced" adapter adds this capability into Munchkin.  But can I ask what you're using it for?  There may be another way.

[Anonymous]

Thanks for your reply Sanford. I was hoping for a callback after the Munchkin cookie is set, so I may send the cookie to another domain.  I assumed Munchkin wouldn't call visitWebPage until that cookie had been finalized, so I was first probing for one there.  Then I later discovered a function called Munchkin.createTrackingCookie but couldn't find any documentation on this, certainly none with any mention of a callback, so then attempted to bind a callback of my own to that but ran out of time figuring out the art of doing that in JS.  So I ended up setting an interval to check for the cookie after the munchkin script is requested.  That seems to work fine, just not as elegant.

[SanfordWhiteman]

No need for an interval.  Cookies are always set synchronously, immediately after the Munchkin library (not the bootstrapper) loads.

So:

  Munchkin.init('AAA-BBB-CCC');
  document.addEventListener('load', function(e) {
    if (/\/munchkin.js$/.test(e.target.src)) {
      setTimeout(function() {
        // cookie must exist here on this turn of the event loop
      });
      document.removeEventListener('load',arguments.callee,true);
    }
  }, true);

[Anonymous]

Very creative and elegant approach!

Thank you so much, I'm going to try this.

[SanfordWhiteman]

Yeah, I am quite proud of it.