w3c / w3c/csswg-drafts

[css-background-4] Switch to opt into transparent canvas for additive displays

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#3,949 35 comments 0 reactions 0 assignees View on GitHub

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css-backgrounds-4
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Description

On passthrough devices such as Magic Leap One or Hololens, the browsing experience in "dark" mode is more pleasant if the browser canvas itself is transparent.

By default, the canvas is white and the [css-color-adjust] spec just inverts that to black.
Can there be a way for an author to specify that the canvas color is transparent? Or can the canvas always be transparent for passthrough devices?

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the linked CSS Color Adjustment specification, especially its color-scheme processing section, and the issue discussion about passthrough devices. Done means reaching agreement on an author-controlled or device-specific transparent canvas behavior and documenting the resulting specification change.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
frontend, web-dev
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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