HTML Attribute rel Errors using fancyBox

If you want to have a fancybox gallery within a valid HTML document (just because we are all purists 😉 then you need two things:

1: An HTML5 DOCTYPE

<!DOCTYPE html>

2: use the data-fancybox-group attribute rather than the rel attribute like:

<a class="fancybox" data-fancybox-group="group1" href="https://stackoverflow.com/questions/9037061/img/work/1.jpg"></a>

That validates!! … see sample here

NOTE: this is for fancybox v2.x

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