production.
=== Configuration changes in 1.31 ===
+* $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
+ a future version. The API is now considered to be stable, secure and
+ essential.
+* $wgUsejQueryThree was removed, as it is now the default. This was documented as a
+ temporary variable during the migration period, deprecated since 1.29.
* …
=== New features in 1.31 ===
-* …
+* Wikimedia\Rdbms\IDatabase->select() and similar methods now support
+ joins with parentheses for grouping.
=== External library changes in 1.31 ===
* MessageBlobStore::insertMessageBlob() (deprecated in 1.27) was removed.
* The global function wfBCP47 was renamed to LanguageCode::bcp47.
* The global function wfBCP47 is now deprecated.
+* The global function wfCountDown() is now deprecated in favor of
+ Maintenance::countDown()
+* The OutputPage class constructor now requires a context parameter,
+ (instantiating without context was deprecated in 1.18)
+* mw.page (deprecated in 1.30) was removed.
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. There is experimental support for