[whatwg] Custom elements and attributes

[Elliotte Harold]

Lachlan Hunt wrote:

> Authors who check their pages using a conformance checker would be 
> alerted to the error.  A typical browser can't do that (at least not by 
> default) because the average user just doesn't care or need to know 
> about such errors.

That's not true. A typical browser absolutely can and certainly should 
alert users to bugs in the pages, and the TAG finding I cited explains 
why and how. Optional recourse to external validators is not sufficient, 
as the current state of the web proves. *Silent* error recovery from 
incorrect metadata is potentially dangerous. It is rightly discouraged.

-- 
Elliotte Rusty Harold  elharo at metalab.unc.edu
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