Update to handle Google Tag Manager using dataLayer

[penguinstampede]

I needed the script to work with GTM, so I added a bit of code to check for the dataLayer variable.
See https://developers.google.com/tag-manager/devguide

[mickey]

Hey @penguinstampede thanks for the PR.
I'm not very familiar with GTM but according to the documentation the dataLayer can eventually be renamed.

Ideally I would detect the dataLayer whatever his name is. I searched a couple of minutes and didn't find any way to do this. I'll check againg tonight or t-row. If I don't, I'm inclined to accept your PR + add an option to pass the dataLayer.
What do you think?

Cheers

[phildpearce]

@mickey & @penguinstampede

Great plugin & a life saver!

But, needs some small refinements...

1. Its strongly recommended to use eventNonInteraction (NOT nonInteraction)
2. eventNonInteraction is incorrect set to "true" on the play click and percent played. Both these interactions should improve bounce rate. Pls change to:
   sendbeacon('play', false, currentTime); // PP changed to false
   sendbeacon('percent played', false, percent); // PP changed to false
3. It is best to explicitly declare 'eventCategory': 'video' (even though this is the same as 'event': 'video').
4. Please add 'videoId' this is needed for GA`s new server-side data append feature called dimension widening via CSV upload.

Updated example...
http://83.223.104.160/~searchph/_testing_script/__itv/gtm-code-examples/videojs-ga-f20f7478752c221ebde9a98e6602f1394d26c3e7/dist/videojs.ga.js

dataLayer.push({
'event': 'video',
'eventCategory': 'video', // Added
'eventAction': action,
'eventLabel': eventLabel,
'eventValue': value,
'eventNonInteraction': nonInteraction, // Changed
'videoId': '' // Added - CustomDimension - Used for server-side data append
});

Thanks

Phil.
GTM specialist
Useful ReadMe: http://bit.ly/gtmdevguide2

[tylerhunt]

Any updates on this?

[Gaebou]

This js https://github.com/BrightcoveOS/videojs-ga-videocloud handles GTM. You just need to adjust labels to merge datas in analytics.