[HTML] Canvas place element

[khushalsagar]

こんにちは TAG-さん!

I'm requesting an early TAG design review of "Canvas place element".

A fundamental capability missing from the web is the ability to complement Canvas with HTML elements. Adding this capability enables Canvas surfaces to benefit from all of the styling, layout and behaviors of HTML, including interactive elements and built-in accessibility.

There are 2 API surfaces to be exposed on this proposal. First, a high level API that brings an Element and its subtree into the 2D Canvas. Second, a broken down version that allows finer control over Javascript and is also available in 3D contexts.

• Explainer¹: https://github.com/WICG/canvas-place-element/blob/main/README.md
• User research:
• Security and Privacy self-review²: https://github.com/WICG/canvas-place-element/blob/main/security-privacy-questionnaire.md
• GitHub repo: https://github.com/WICG/canvas-place-element
• Primary contacts:
  • Fernando (@fserb), Google, Spec author
  • Khushal (@khushalsagar), Google, Spec author
  • Stephen Chenney (@schenney), Igalia, Spec author
• Organization/project driving the design:
  • Google
  • Igalia
• Multi-stakeholder feedback³:
  • Chromium comments: Supportive, we have a prototype landing in Blink.
  • Mozilla comments: HTML-in-Canvas mozilla/standards-positions#1076
  • WebKit comments: [HTML] Canvas place element WebKit/standards-positions#403
  • Developer feedback: https://docs.google.com/document/d/13M0VtYSAnl_aU7SQoFBuM2DrAkQTZSFHi_ojypJdcpA/edit

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• The group where the incubation/design work on this is being done (or is intended to be done in the future): WICG
• The group where standardization of this work is intended to be done ("unknown" if not known): WHATWG
• Existing major pieces of multi-implementer review or discussion of this design:
• Major unresolved issues with or opposition to this design:
• This work is being funded by: Google