Re: @else in Media Queries

> On Jun 11, 2016, at 12:38 AM, Daniel Glazman <daniel.glazman@disruptive-innovations.com> wrote:
> 
> I don't
> want standalone @else rules to appear because an OM-based app or webapp
> hasn't been updated to deal with @else.

Isn't that mostly no worse than an un-updated editor leaving behind or ignoring any new @rule? In some ways it would be better, because a dangling @else would just match nothing. 

> We would break 20+ years of
> "deletion of a valid rule does not change validity of a sheet".

It shouldn't change the validity of the entire sheet its in. It should just be skipped for matching no conditions. 

In the case where an older @else-unaware editor is deleting the @media and causing the @else to be mismatched to the wrong @media: well, the editor probably isn't rendering the page correctly anyway, because it is ignoring the @else.

Though, this is probably a good argument for using @when instead of matching @else to existing @media and @supports blocks. That way, the editor (and browsers) would ignore both together. Better graceful degradation.