When you have NWE beta enabled, then proveit will throw an error.
It will fail inside the prove() function, because var wikitext = proveit.getTextbox().val() will return null, as there is no wptextbox1 on the page in this case.
Description
Description
Event Timeline
Comment Actions
The loader assumes that action=edit means the classic editor will be available, it should also check for the existence of #wpTextbox1.
Comment Actions
I updated the initialization code so that it checks for the existence of the #wpTextbox1 element before loading ProveIt. See https://commons.wikimedia.org/wiki/Help:Gadget-ProveIt or https://en.wikipedia.org/wiki/MediaWiki:Gadget-ProveIt.js
I also updated the initialization code of all the Wikipedias using ProveIt.