From: Timo Tijhof <ttijhof@wikimedia.org>
Date: Tue, 26 Mar 2013 17:59:07 +0000 (+0100)
Subject: mw.loader: Guard against odd setTimeout behaviour in old Firefox
X-Git-Tag: 1.31.0-rc.0~20202^2
X-Git-Url: https://git.cyclocoop.org/%7B%24admin_url%7Dmembres/modifier.php?a=commitdiff_plain;h=a1d4f5b0a27752d31d7a7c3b6a7231fde3501696;p=lhc%2Fweb%2Fwiklou.git

mw.loader: Guard against odd setTimeout behaviour in old Firefox

Bug: 46575
Change-Id: I80af730daa815f0c273fe942c570d1f0144bbbb1
---

diff --git a/resources/mediawiki/mediawiki.js b/resources/mediawiki/mediawiki.js
index 2ceb3eac78..d1cb41d6a0 100644
--- a/resources/mediawiki/mediawiki.js
+++ b/resources/mediawiki/mediawiki.js
@@ -487,7 +487,13 @@ var mw = ( function ( $, undefined ) {
 						// TODO: Use requestAnimationFrame in the future which will
 						// perform even better by not injecting styles while the browser
 						// is paiting.
-						setTimeout( addEmbeddedCSS );
+						setTimeout( function () {
+							// Can't pass addEmbeddedCSS to setTimeout directly because Firefox
+							// (below version 13) has the non-standard behaviour of passing a
+							// numerical "lateness" value as first argument to this callback
+							// http://benalman.com/news/2009/07/the-mysterious-firefox-settime/
+							addEmbeddedCSS();
+						} );
 						return;
 					}