Re: [selectors-api]

Anne van Kesteren wrote:
> To ensure that naïve implementors don't overlook the potential issue 
> here. An implementation of NSResolver can be provided by the script 
> author as the specification explains and the script author can do all 
> kinds of weird things that don't match a conforming implementation of 
> NSResolver (such as mutating the DOM tree).

Is a conforming querySelector implementation allowed to throw an exception when 
this happens?

In fact, is a conforming querySelector implementation allowed to throw an 
exception if the NSResolver does something that it detects is non-conforming?

-Boris