We've been using Google Tag Manager (GTM) because it allows us to use one block of code that supports Google Analytics (GA4), Microsoft Advertising and Google Customer Reviews.

This is in place of the GA4 support that's now integrated with the ECT shopping cart.

However, after some brilliant troubleshooting by Phil at Bettapages, it was determined that GTM was interfering with the Fancybox JavaScript code on our site, resulting in intermittent problems that were ugly, confusing to users, and difficult to track down.

Following Phil's advice we were able to strip out enough GTM tags and triggers to speed it up to the point where our pages load normally - but it's a concern that these ugly surprises could return should Google force another change in our GTM configuration (as they did this year with GA4).

Worse yet, the GTM preview feature didn't display any of those errors; we had to deploy each GTM change to our production site and eventually discover problems that visitors were seeing.

Out of fear of this sort of issue repeating, it's tempting to remove GTM and replace it with all those different tracking scripts.

Is anyone else still using GTM? Any issues? Do you plan to keep it?

Hi Paul, I too use (and a big fan of) fancybox.
I also use the the GTM.
No problems here at all.

Do you know what version of fancybox you have?

Thanks,
David

Dave, we're running the 2013 version of Fancybox v2.1.4.

Last week, when we first discovered the issue, we bought a new Fancybox v5 license to try.

However, changing to v5 looks pretty complex - presumably we'd need to update lots of headers and libraries, along with hundreds of v2 links on our site that currently look like this:

<a class="various fancybox.iframe" href="info/information-box.html" >link text</a>

Am I right that the v2 iframe link above won't work with v5?

Hi Paul, it looks like I am on 2.5 of fancybox.
I think I did upgrade to that version from an earlier (1.x) version.
Honestly I may not have looked at newer versions in a while, but I did recall updating once.

Below are a few links I use - My iframe links looks like this -
I'm not sure what the "various" does in your version.

I found another link I use and that's inline


Of course I'm sure you understand the various ways to use fancybox.
FYI - You can easily use it for your tooltips in place of the native ect tooltips.

I also recall having problems at some point with fancybox where I tried aa few different versions of jquery and right now I am using v3.3.1
I would see what version you have as that may sort your issues out.
Lastly, the order of the fancybox and GT4 calls may play a factor and I can share how mine are setup, or you can view source on my pages to see that.

Thanks,
David

Thanks so much for this, Dave!