- From: Rich Tibbett <richt@opera.com>
- Date: Wed, 09 May 2012 12:40:42 +0200
- To: Scott González <scott.gonzalez@gmail.com>
- Cc: "whatwg@whatwg.org" <whatwg@whatwg.org>, "Carr, Wayne" <wayne.carr@intel.com>, Doug Turner <dougt@mozilla.com>, JOSE MANUEL CANTERA FONSECA <jmcf@tid.es>, Andrei Popescu <andreip@google.com>, Jonas Sicking <jonas@sicking.cc>
Scott González wrote: > On Tuesday, May 8, 2012, Doug Turner wrote: > >> You don't. This API doesn't have device detection. Don't assume that >> onXXX means that the UA supports an event. >> > > I thought this was the preferred way to check. I seem to recall a > discussion about this and agreement that this was the best way to detect > events. The WHATWG spec [1] itself says the following: "When support for a feature is disabled (e.g. as an emergency measure to mitigate a security problem, or to aid in development, or for performance reasons), user agents must act as if they had no support for the feature whatsoever, and as if the feature was not mentioned in this specification. For example, if a particular feature is accessed via an attribute in a Web IDL interface, the attribute itself would be omitted from the objects that implement that interface — leaving the attribute on the object but making it return null or throw an exception is insufficient." If the feature is not yet implemented then the same principle should apply IMO (if that's not implicit in the above). - Rich [1] http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#extensibility
Received on Wednesday, 9 May 2012 10:41:28 UTC