- From: <bugzilla@jessica.w3.org>
- Date: Fri, 11 May 2012 06:44:48 +0000
- To: public-webapps-bugzilla@w3.org
https://www.w3.org/Bugs/Public/show_bug.cgi?id=16953
--- Comment #6 from Glenn Maynard <glenn@zewt.org> 2012-05-11 06:44:48 UTC ---
(In reply to comment #4)
> We can use getter for feature detection. For example:
> var hasOneTimeOnly = false, hasAutoRevoke = false;
> var o = {};
> Object.defineProperty(o, "oneTimeOnly", { get: function(){ hasOneTimeOnly =
> true; return false; } });
> Object.defineProperty(o, "autoRevoke", { get: function(){ hasAutoRevoke = true;
> return false; } });
> URL.createObjectURL(new Blob(), o); // getter will be called if supported
This requires far more knowledge of how IDL dictionaries work than can be
reasonably expected. Feature detection shouldn't be so complex that everyone
needs to use a helper library to do it, especially not for something as common
as whether an IDL dictionary contains a property.
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Received on Friday, 11 May 2012 06:44:52 UTC