Exciting stuff -
LGTM to experiment from M148 to M151 inclusive.
On 4/9/26 2:49 p.m., Philip Rogers wrote:
*Contact emails*
[email protected], [email protected], [email protected],
[email protected], [email protected]
*Explainer*
https://github.com/WICG/html-in-canvas
*Specification*
https://github.com/whatwg/html/pull/11588
*Summary*
HTML-in-canvas enables customizing the rendering of html using canvas
with three new primitives: an attribute to opt-in canvas elements
(layoutsubtree), methods to draw child elements (2d: drawElementImage,
webgl: texElementImage2D, webgpu: copyElementImageToTexture), and a
paint event which fires to handle updates.
*Blink component*
Blink>Canvas
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECanvas%22>
*Web Feature ID*
canvas <https://webstatus.dev/features/canvas>
*Goals for experimentation*
API shape
*Origin Trial documentation link*
https://github.com/WICG/html-in-canvas
*Goals for experimentation*
None
*Risks*
*Interoperability and Compatibility*
This API exposes a small amount of new information which carries an
interop risk, such as the pixels of gradients and form controls.
/Gecko/:
Negative (https://github.com/mozilla/standards-positions/issues/1076) Mozilla
did not object to advancing the spec to stage 2 (consensus around
rough API shape), and we are actively working to address their
concerns about fingerprinting and compatibility.
/WebKit/: No
signal (https://github.com/WebKit/standards-positions/issues/630)
/Web developers/:
Positive (https://github.com/whatwg/html/issues/10650#issuecomment-3324124682) We
have positive signals from users of the DevTrial:
https://github.com/whatwg/html/issues/10650#issuecomment-3324124682
/Other signals/:
*Security*
https://github.com/WICG/html-in-canvas?tab=readme-ov-file#privacy-preserving-painting
*WebView application risks*
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
/No information provided/
*Debuggability*
Content under canvas can be debugged like regular DOM content via
devtools.
*Will this feature be supported on all six Blink platforms (Windows,
Mac, Linux, ChromeOS, Android, and Android WebView)?*
Yes
*Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
Yes
https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/wpt_internal/html/canvas/drawElementImage/
*DevTrial instructions*
https://github.com/WICG/html-in-canvas?tab=readme-ov-file#developer-trial-dev-trial-information
*Flag name on about://flags*
chrome://flags/#canvas-draw-element
*Finch feature name*
CanvasDrawElement
*Requires code in //chrome?*
False
*Tracking bug*
https://crbug.com/500967896
*Measurement*
HTMLInCanvas UseCounter
*Estimated milestones*
Origin trial desktop first 148
Origin trial desktop last 151
DevTrial on desktop 138
Origin trial Android first 148
Origin trial Android last 151
DevTrial on Android 138
Origin trial WebView first 148
Origin trial WebView last 151
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/5172548013916160
*Links to previous Intent discussions*
Intent to Prototype:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/a473b17f-def6-4bb7-85ee-344947c5ecabn%40chromium.org
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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