Not a recommended dynamic styling hook but for completeness sake.
Created attachment 271427 [details] patch
Comment on attachment 271427 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=271427&action=review r=me > Source/WebCore/ChangeLog:12 > + However dynamic id changes are not common enought (nor recommended) to pay the memory cost of > + the required data structures. Strongly agree with this. Also s/enought/enough/ > Source/WebCore/WebCore.xcodeproj/project.pbxproj:10555 > - 83D35AEF1C718D8400F70D5A /* JSXMLHttpRequestEventTarget.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = JSXMLHttpRequestEventTarget.cpp; path = JSXMLHttpRequestEventTarget.cpp; sourceTree = "<group>"; }; > - 83D35AF01C718D8400F70D5A /* JSXMLHttpRequestEventTarget.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = JSXMLHttpRequestEventTarget.h; path = JSXMLHttpRequestEventTarget.h; sourceTree = "<group>"; }; > + 83D35AEF1C718D8400F70D5A /* JSXMLHttpRequestEventTarget.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSXMLHttpRequestEventTarget.cpp; sourceTree = "<group>"; }; > + 83D35AF01C718D8400F70D5A /* JSXMLHttpRequestEventTarget.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSXMLHttpRequestEventTarget.h; sourceTree = "<group>"; }; > 83E359A01BB1031D002CEB98 /* JSHTMLTimeElement.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSHTMLTimeElement.h; sourceTree = "<group>"; }; I don't know what these are about.
https://trac.webkit.org/r196636