On May 2, 2008, at 7:23 PM, Boris Zbarsky wrote:
Lachlan Hunt wrote:
What do they do if there is an element named <null> in the
document?
IE 8 Beta: Returns null or empty NodeList
Interesting. What happens in IE8b1 if you do:
document.querySelector("")
Throws a SYNTAX_ERR.
In that case, the null behavior doesn't make any sense to me... I
would expect querySelector(null) to either behave as
querySelector("null") (as in Opera) or as querySelector("") (as in
Gecko and apparently Webkit)...
Sounds like whatever gets specified here we need a test for it in
the test suite, at least.
I'm not sure what NoNull is supposed to mean, but existing DOM APIs
that take strings almost always either treat JS null the same as "",
or the same as "null". I think Web IDL should define a property to
distinguish these cases. In WebKit's IDL we have the overly verbose
[ConvertNullToNullString] extended attribute for the first case (we
internally distinguish null string from empty string and I think there
may be a tiny number of APIs that actually treat null and empty
differently). I am not sure which of these behaviors [NoNull] applies
to.
We have similar extended attributes for IDL method return values or
attributes that are nominally DOMString but may return other values
such as null, or occasionally undefined, or in at least one crazy
case, boolean false (thanks to whoever designed queryCommandValue).
Regards,
Maciej
