Hi,

we've released v0.40.0 and follow-up hot fix v0.40.1 of OOUI library last Friday. It will rollout on the normal train tomorrow, Tuesday, 11 August.

Highlights in this release: - Removal of Internet Explorer 8 specific code and fallbacks, largely reducing size of CSS (~800+ lines on all icons) due to removal of PNG fallback images, relying only on SVG icons from here on. This is going to have a positive performance impact for all other users of the library. This is in alignment with approved RFC on removing IE 8 Basic support for MediaWiki core.[0]. Hence, this release is a breaking release. If you need continuous support in your environment for IE 8 you need to stick with v0.39.3.

You can find details on additional new features, code-level, styling and interaction design amendments, and all improvements since v0.38.0 in the full changelog[1].

If you have any further queries or need help dealing with breaking changes, please let me know.

As always, interactive demos[2] and library documentation is available on mediawiki.org[3], there is comprehensive generated code-level documentation and interactive demos and tutorials hosted on doc.wikimedia.org[4].

OOUI version: 0.40.1 MediaWiki version: 1.36.0-wmf.4 Date of deployment to production: Regular train, starting Tuesday 11 August

[0] - https://phabricator.wikimedia.org/T248061 [1] - https://gerrit.wikimedia.org/g/oojs/ui/+/v0.40.1/History.md [2] - https://doc.wikimedia.org/oojs-ui/master/demos/#widgets-mediawiki-vector-ltr [3] - https://www.mediawiki.org/wiki/OOUI [4] - https://doc.wikimedia.org/oojs-ui/master/

Best, Volker