Re: [SelectorsAPI] Selector detection needed?

[moving this to the right mailing list]
Daniel Glazman wrote:
> Oh come on. So to test if the childhood combinator ">" is implemented

Why would you be testing that?  What's the use case?

The way I see this working in practice is something like this:

   var elements;
   try {
     elements = document.querySelectorAll("something");
   } catch (e) {
     // Use a slower implementation of the "something" selector
   }

This is certainly how I expect JS libraries to use querySelectorAll...

In what cases would you want to check whether a selector is parsed but _not_ 
actually try matching against it?

-Boris