3.Install[composer](https://getcomposer.org/download/) and make sure running `composer` will execute it (*e.g.* add it to `$PATH` in POSIX environments).
9.Youcannavigatetohttp://localhost/tests/ to run the tests locally in your browser.
Weuse[Gerrit](https://gerrit.wikimedia.org/) for code review, and [Phabricator](https://phabricator.wikimedia.org) to track issues. To contribute patches or join discussions all you need is a [developer account](https://wikitech.wikimedia.org/w/index.php?title=Special:CreateAccount&returnto=Help%3AGetting+Started).
*Tosubmityourpatch,follow[the"getting started"quick-guide](https://www.mediawiki.org/wiki/Gerrit/Getting_started). We try to review patches within a week.
*Weautomaticallylintandstyle-checkchangestoJavaScript,PHP,LESS/CSS,RubyandJSONfiles.Youcantesttheseyourselfwith`npmtest`and`composertest`locallybeforepushingchanges.SVGfilesshouldbesquashedinadvanceofcommittingwith[SVGO](https://github.com/svg/svgo) using `svgo --pretty --disable=removeXMLProcInst --disable=cleanupIDs <filename>`.