489532 - document.createElement("<x>") does not throw in quirks mode

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[Anne (:annevk)]

In both Opera and WebKit-based browsers document.createElement("<x>") gives you an INVALID_CHARACTER_ERR regardless of the rendering mode. Gecko only throws in standards mode.

http://software.hixie.ch/utilities/js/live-dom-viewer/?%3Cscript%3Ew%28document.createElement%28%22%3Cx%3E%22%29%29%3C%2Fscript%3E

Comment 1

[Henri Sivonen (:hsivonen)]

IIRC, this was added for behind-a-firewall IE compat.

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

http://bonsai.mozilla.org/cvsblame.cgi?file=mozilla/content/html/document/src/nsHTMLDocument.cpp&rev=3.791&mark=1459,1467-1473#1458

Comment 3

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Attachment: Patch v1

Comment 4

[Marco Bonardo [:mak]]

this is bitrotted against current m-c, please provide an updated patch and
re-ask c-n.

Comment 5

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Attachment: Patch v2 (merged to tip)

r=jonas

Comment 6

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Attachment: Patch v2.1, merged to tip

Fixed a typo.

Comment 7

[Dão Gottwald [:dao]]

http://hg.mozilla.org/mozilla-central/rev/ecdf587c02d0

Comment 8

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

I added a note to <https://developer.mozilla.org/en/Firefox_4_for_developers#section_8>. Apparently, this quirk wasn't actually documented anywhere, so I don't think anything else is needed.

Comment 9

[Alexey Proskuryakov]

> IIRC, this was added for behind-a-firewall IE compat.

FYI, public sites were (are?) also affected: <https://bugs.webkit.org/show_bug.cgi?id=25893>. As Firefox is removing this quirk, we likely won't add it to WebKit.

Comment 10

[Dennis Haney]

It is still not giving any warnings or errors in the firebug console when this happens. As of FF4b12

Comment 11

[Boris Zbarsky [:bzbarsky]]

That sounds like a problem with Firebug; if you actually look at our error console you'll see an exception is thrown.