Add colorType documentation to CanvasRenderingContext2DSettings

[ccameron-chromium]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/getContextAttributes

What specific section or headline is this issue about?

Return value

What information was incorrect, unhelpful, or incomplete?

The new CanvasRenderingContext2DSettings attribute of colorType is absent.

This is a new property added in this PR.

What did you expect to see?

This affects the following pages.

For getContextAttributes under CanvasRenderingContext2D

• Under the return value section
• Add colorType for the color type.
• Note that when issue 37727 is resolved, this will need to be added to the same section for OffscreenCanvasRenderingContext2D

For getContext on HTMLCanvasElement

• In the 2d context attributes section
• Add colorType to the list of parameters that affect the 2D context creation

For getContext for OffscreenCanvas

• Do the same changes in the "2d context attributes" section as is done for the HTMLCanvasElement version of the function.

Do you have any supporting links, references, or citations?

PR for the change adding this feature:
whatwg/html#10951

Explainer for the feature:
https://github.com/ccameron-chromium/ColorWeb-CG/blob/canvas2d_float/canvas_float.md

Do you have anything more you want to share?

No response

[Josh-Cena]

What's the implementation status?

[ccameron-chromium]

Not shipping on any browser yet:

• Chromium: https://crbug.com/40277213
• Gecko: https://bugzilla.mozilla.org/show_bug.cgi?id=1946355
• WebKit: https://bugs.webkit.org/show_bug.cgi?id=287139

[hamishwillee]

@ccameron-chromium I understand that updating MDN with these changes is part of the working group processes, which is excellent. Is there any way to hint in that process that the implementation status information you provided above be included in the post? We almost always have to ask for it (sometimes it is in the linked implementation PR)

EDIT. Actually, note Josh link below. Ignore. Thanks.

[Josh-Cena]

@hamishwillee If you aren't aware: whatwg/meta#334