* Review site scripts to verify that no wikibits methods are used.
* If you find usage of wikibits, refactor the code to use newer methods
instead, or add a dependency on the 'mediawiki.legacy.wikibits' module.
module has been a long time coming. This announces another step in that
In 2011, wikibits was deprecated following the introduction of
ResourceLoader in MediaWiki 1.17. To accommodate pre-ResourceLoader code
created to allow existing sites (such as Wikimedia wikis) to load
"mediawiki.legacy.wikibits" by default on all pages. While most code no
longer uses wikibits, it remains set to this day.
In 2013, we introduced mw.log.deprecate in MediaWiki 1.23 to help you
detect any use of deprecated methods in the browser's developer console.
We have seen a big reduction in the use of such methods.
In 2015, we made significant performance improvements in MediaWiki 1.26, by
avoid breaking undeclared use of wikibits, we made an exception for
before other modules".
Now, as the last step before removing wikibits from MediaWiki, it will
first no longer load by default in MediaWiki 1.27. This change will roll
out on Wikimedia wikis in April 2016. If you find usage of wikibits
features without a dependency, please refactor this code to use the modern
replacements, or add an explicit dependency as temporary stop-gap while
figuring out how to refactor the code.
Before re-factoring, please remember to first check whether the associated
code is working. Many wikibits methods have become empty placeholders to
avoid cascading failures. As such, blind updates may cause old or broken
code that is currently invisible to re-activate itself. Removing dead code
speeds up wikis for all users, and reduces the risk of things going wrong
For third-party wikis, this will ship in MediaWiki 1.27.0. If needed, you
This will give you time to fix missing dependencies on wikibits. In
MediaWiki 1.28, to be released in November 2016, the wikibits module will
be removed entirely.