Currently the entire thing is a javascript file.
For an experiment that's perfectly fine, but this has since been deployed in full on the English Wikipedia and thus that is no longer a viable implementation.
From a user standpoint, anyone without js will miss out on it entirely when much of the visual stuff would still benefit the new folks even without the added responsiveness.
From a developer standpoint, having the thing implemented in js makes it harder to work with in general as it does not follow interface standards.
From an i18n standpoint, there is no i18n nor any system messages in general.
From a wiki admin standpoint, without system messages, the only way to customise things is javascript, but it can be very difficult if not impossible to write on-wiki js that will work with/override system js, which this is.
Version: unspecified
Severity: normal
URL: https://en.wikipedia.org/wiki/Special:CreateAccount