[whatwg] proposal: Add support for masking to canvas

[Cameron McCormack]

On 30/01/13 6:28 PM, Ian Hickson wrote:
> That's weird. heycam, can you elaborate on this? The addHitRegion() case
> in particular never makes sense to be called without a dictionary
> containing at least one member. Do we have to allow it?

This is to encourage (require, really) API design that allows the 
dictionary object to be not specified at all.  Remember that all 
dictionary members can be "not specified" anyway.

Do you want addHitRegion() to throw just like addHitRegion({}) would 
throw?  That will happen if you already have wording to say that 
addHitRegion({}) will throw.