Hi,
The jquery.badge and jquery.placeholder ResourceLoader modules will be
removed with the upcoming 1.31.0-wmf.10 release in about 3 weeks. These
were intended to be removed with this weeks deployment but it was
reverted since there was still some usage in gadgets on Commons[0].
Please check your wikis to see if any gadgets or popular user scripts
are still using them, and update them as needed.
For jquery.badge you can copy in parts of the upstream code[1] depending
on what you need.
For jquery.placeholder, it should just be removed as all the browsers we
support JavaScript for support the HTML5 "placeholder" property.[2]
[0]
https://phabricator.wikimedia.org/T178450#3746565
[1]
https://github.com/wikimedia/jquery-badge
[2]
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input
Thanks,
-- Kunal / Legoktm