Feature Request: Custom Fragments

[donaldpipowitch]

Please add the possibility to add custom fragments. E.g. something like class="fragment custom-fragment-effect". Currently the fragment would be invisible by default. It would be great if you could whitelist all classes with a specific prefix like [class^="custom-fragment-"],[class*=" custom-fragment-"] {}.

[hakimel]

I think it's okay to expect custom fragments to set opacity to 1 if they need to be visible from the start. The default behavior of a fragment is to be invisible and then appear, so it makes for anything that wants to change that behavior to override the defaults.