- From: Tobie Langel <tobie.langel@gmail.com>
- Date: Mon, 10 Sep 2012 21:28:50 +0200
- To: Dean Jackson <dino@apple.com>
- Cc: "whatwg@lists.whatwg.org" <whatwg@lists.whatwg.org>
On Sep 10, 2012, at 8:14 PM, Dean Jackson <dino@apple.com> wrote:
> I propose adding a new method to HTMLCanvasElement:
>
> interface HTMLCanvasElement : HTMLElement {
> boolean supportsContext(DOMString contextId, any... arguments);
> };
>
> supportsContext takes the same parameters as getContext, and simply returns
> true if the corresponding call to getContext would have returned a valid
> context, false otherwise.
What about enabling feature detection by providing a method per context?
interface HTMLCanvasElement : HTMLElement {
object get2DContext();
object getWebGLContext(any... args);
};
That way, developers can use idiomatic JS for feature testing like
pretty much everywhere else on the Web platform:
if (canvas.get2DContext) {
// do stuff with 2D canvas
}
--tobie
Received on Monday, 10 September 2012 19:29:17 UTC