Hi everybody. I have a question about the definition of CanvasRenderingContext2D's behavior.
The current spec about CanvasRenderingContext2D says the following: > Except where otherwise specified, for the 2D context interface, > any method call with a numeric argument whose value is infinite > or a NaN value must be ignored. https://html.spec.whatwg.org/multipage/scripting.html#canvasrenderingcontext2d But I think that, why don't CanvasRenderingContext2D use restricted float type defined in WebIDL if these methods ignore the value when its is not finite? By the current WebIDL spec (http://heycam.github.io/webidl/#es-double), restricted values, 'float' & 'double', will raise TypeError in conversion phase under ECMAScript environment if the passed value is a NaN or +-Infinity. For the purpose to ignore non-restricted values, I feel that it's more better to restrict by IDL type. So the definitions by the current spec is for backward compatibility, or simply a spec issue? Thanks. -- Tetsuharu OHZEKI
