Thank you.
This Intent is only about <embed> and <object>, which are the cases covered by WPT tests and supported by other browsers (already implemented in Firefox, open bug in WebKit). My first CL placed this change in LayoutEmbeddedContent, so it would have also applied to iframes. This did not have any actual impact because iframes don't report natural dimensions, and the code was moved to LayoutEmbeddedObject in a second CL. The current implementation does not yet support the case where the SVG comes from a different site and is rendered in a separate process: <object data="https://other-site.net/chart.svg"; style="width: 400px; height: 400px; object-fit: contain"></object> This is a known limitation, noted with a TODO in LayoutEmbeddedObject::ReplacedContentRectFrom: // TODO(crbug.com/41302806): Only works for same-origin content (LocalFrame). Best, Felipe On Tuesday, 22 September 2026 at 05:46:57 UTC+9 Stephen Chenney wrote: > On Mon, Sep 21, 2026 at 3:03 PM Mike Taylor <[email protected]> wrote: > >> >> On 9/20/26 10:54 p.m., Chromestatus wrote: >> >> *Contact emails* >> [email protected] >> >> *Specification* >> >> https://html.spec.whatwg.org/multipage/rendering.html#embedded-content-rendering-rules >> >> >> *Summary* >> SVG documents loaded through <object> or <embed> are sized and positioned >> inside the element's content box according to the CSS object-fit and >> object-position properties, the same way <img> content is. Previously >> Chrome ignored both properties for embedded SVG documents and always >> stretched the document viewport to the whole content box. >> >> *Blink component* >> Blink>SVG >> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ESVG%22> >> >> *Web Feature ID* >> object-fit <https://webstatus.dev/features/object-fit> >> >> *Motivation* >> Authors use object-fit and object-position to control how replaced >> content is scaled and placed inside its box. >> https://drafts.csswg.org/css-images-3/#the-object-fit >> https://drafts.csswg.org/css-images-3/#the-object-position Currently, >> Chrome applies them to images and videos but ignores them for SVG documents >> loaded through <object> or <embed>, which are always stretched to fill the >> element. The fix has been implemented behind the >> SVGEmbeddedAsReplacedElement flag since M141. This entry ships it by >> default. >> >> *Initial public proposal* >> *No information provided* >> >> *Search tags* >> svg <http:///features#tags:svg>, object-fit >> <http:///features#tags:object-fit>, object-position >> <http:///features#tags:object-position> >> >> *TAG review* >> *No information provided* >> >> *TAG review status* >> Not applicable >> >> *Goals for experimentation* >> None >> >> *Risks* >> >> >> *Interoperability and Compatibility* >> With the initial values (object-fit: fill; object-position: 50% 50%) the >> replaced content rect is the whole content box, so pages that do not set >> these properties render as before. Rendering changes where authors >> intentionally set object-fit / object-position on an <object>/<embed> >> hosting an SVG document. Firefox already applies both properties in this >> case; Safari not yet (https://bugs.webkit.org/show_bug.cgi?id=317804). >> Rendering also changes in fullscreen, where the UA stylesheet sets >> object-fit: contain for a fullscreen <object>/<embed>. This is tested by >> https://wpt.fyi/results/fullscreen/rendering/backdrop-object.html >> (Firefox and Safari time out on that test for harness reasons, test can be >> verified manually on Firefox.) Only <object> and <embed> are affected; >> <iframe> is unchanged, as in Firefox. Known limitation: SVG documents >> hosted in an out-of-process frame are not covered and keep the old >> behaviour. >> >> Could you elaborate on why the OOPIF behavior differs? Sometimes SVG is > embedded in an iframe and I would expect sizing to work the same in that > context. > >> >> >> *Gecko*: Shipped/Shipping (https://wpt.fyi/results/css/css-images) See >> the related WPT tests in the css-images folders. >> >> *WebKit*: No signal (https://bugs.webkit.org/show_bug.cgi?id=317804) Bug >> still in the NEW status. >> >> Can we request an official signal from WebKit please? >> >> >> *Web developers*: No signals >> >> *Other signals*: >> >> *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? >> None. >> >> >> *Debuggability* >> No changes, as object-fit and object-position are already supported by >> 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://wpt.fyi/results/css/css-images/object-fit-contain-svg-001e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-001o.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-002e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-002o.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-003e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-003o.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-004e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-004o.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-005e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-005o.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-006e.html >> https://wpt.fyi/results/css/css-images/object-fit-contain-svg-006o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-001e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-001o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-002e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-002o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-003e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-003o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-004e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-004o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-005e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-005o.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-006e.html >> https://wpt.fyi/results/css/css-images/object-fit-cover-svg-006o.html >> https://wpt.fyi/results/css/css-images/object-fit-dyn-aspect-ratio-001.html >> https://wpt.fyi/results/css/css-images/object-fit-dyn-aspect-ratio-002.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-001e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-001o.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-002e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-002o.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-003e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-003o.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-004e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-004o.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-005e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-005o.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-006e.html >> https://wpt.fyi/results/css/css-images/object-fit-fill-svg-006o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-001e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-001o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-002e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-002o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-003e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-003o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-004e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-004o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-005e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-005o.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-006e.html >> https://wpt.fyi/results/css/css-images/object-fit-none-svg-006o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-001e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-001o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-002e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-002o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-003e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-003o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-004e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-004o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-005e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-005o.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-006e.html >> https://wpt.fyi/results/css/css-images/object-fit-scale-down-svg-006o.html >> >> *Flag name on about://flags* >> SVGEmbeddedAsReplacedElement >> >> *Finch feature name* >> SVGEmbeddedAsReplacedElement >> >> *Rollout plan* >> Will ship enabled for all users >> >> *Requires code in //chrome?* >> False >> >> *Tracking bug* >> https://issues.chromium.org/41302806 >> >> *Estimated milestones* >> Shipping on desktop 157 >> Shipping on Android 157 >> Shipping on WebView 157 >> >> *Anticipated spec changes* >> >> Open questions about a feature may be a source of future web compat or >> interop issues. Please list open issues (e.g. links to known github issues >> in the project for the feature specification) whose resolution may >> introduce web compat/interop risk (e.g., changing to naming or structure of >> the API in a non-backward-compatible way). >> None. >> >> *Link to entry on the Chrome Platform Status* >> https://chromestatus.com/feature/4886345347629056?gate=4869870255734784 >> >> This intent message was generated by Chrome Platform Status >> <https://chromestatus.com>. >> -- >> You received this message because you are subscribed to the Google Groups >> "blink-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6ab09c5b.60d96795.386b54.0022.GAE%40google.com >> >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6ab09c5b.60d96795.386b54.0022.GAE%40google.com?utm_medium=email&utm_source=footer> >> . >> >> -- >> You received this message because you are subscribed to the Google Groups >> "blink-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/93ad2edf-af73-4e2e-a3e9-81700e2aeb0e%40chromium.org >> >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/93ad2edf-af73-4e2e-a3e9-81700e2aeb0e%40chromium.org?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/500023cb-1801-472e-8543-591b8a030ecdn%40chromium.org.
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