[Webkit-unassigned] [Bug 83993] Unsupported commands in execCommand/queryCommand* should throw except queryCommandSupported

Mon Apr 16 09:25:12 PDT 2012

https://bugs.webkit.org/show_bug.cgi?id=83993

--- Comment #2 from Ryosuke Niwa <rniwa at webkit.org>  2012-04-16 09:25:12 PST ---
(In reply to comment #1)
> Engines support different sets of commands, so raising an exception is particularly likely to completely break a page, as opposed to some minor stylistic difference.
> 
> I think that making execCommand raise an exception for unknown verb would be wrong.

But IE has been and will be throwing exceptions. If anything websites should be calling queryCommandSupported.

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