script: Fix loading of about:srcdoc documents by TimvdLippe · Pull Request #41959 · servo/servo

TimvdLippe · 2026-01-16T14:14:01Z

Align with the spec and implement part of its lazy loading
steps. Most tests use non-srcdoc lazy loading URLs, so most
tests will not pass until the other parts are implemented
as well.

github-actions · 2026-02-07T09:48:07Z

🔨 Triggering try run (#21778154557) for Linux (WPT)

github-actions · 2026-02-07T10:19:39Z

Test results for linux-wpt from try job (#21778154557):

Flaky unexpected result (29)

OK /IndexedDB/idbfactory-open-error-properties.any.html
- PASS [expected FAIL] subtest: Properties of error event from failed open()
OK /IndexedDB/idbfactory-open-error-properties.any.worker.html
- PASS [expected FAIL] subtest: Properties of error event from failed open()
CRASH [expected OK] /_mozilla/mozilla/img_load_more_than_cache.html

OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)

FAIL [expected PASS] subtest: WebGL test #45

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #47

assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false

FAIL [expected PASS] subtest: WebGL test #49

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #51

assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false

PASS [expected FAIL] subtest: WebGL test #53
PASS [expected FAIL] subtest: WebGL test #55
PASS [expected FAIL] subtest: WebGL test #57
PASS [expected FAIL] subtest: WebGL test #59

FAIL [expected PASS] subtest: WebGL test #61

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #63

assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false

And 10 more unexpected results...

OK /content-security-policy/frame-ancestors/frame-ancestors-path-ignored.window.html (#36468)
- PASS [expected FAIL] subtest: A 'frame-ancestors' CSP directive with a URL that includes a path should be ignored.
CRASH [expected PASS] /css/css-overflow/scroll-marker-in-display-none-column-crash.html
TIMEOUT /fetch/metadata/generated/css-images.sub.tentative.html (#29047)
- FAIL [expected PASS] subtest: content sec-fetch-site - HTTPS downgrade-upgrade
```
assert_unreached: Reached unreachable code
```
ERROR [expected TIMEOUT] /html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-initial-navigation.html (#40387)
OK /html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html (#28691)
- FAIL [expected PASS] subtest: load event does not fire on window.open('about:blank')
```
assert_unreached: load should not be fired Reached unreachable code
```
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.html (#29049)
- PASS [expected FAIL] subtest: Same-origin navigation started from unload handler must be ignored
OK /html/browsers/history/the-history-interface/traverse_the_history_4.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
TIMEOUT /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)
- TIMEOUT [expected FAIL] subtest: Element with tabindex should support autofocus
```
Test timed out
```
- NOTRUN [expected TIMEOUT] subtest: Non-HTMLElement should not support autofocus
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/update-the-rendering.html (#24145)
- FAIL [expected TIMEOUT] subtest: "Flush autofocus candidates" should be happen before a scroll event and animation frame callbacks
```
assert_array_equals: animationFrame lengths differ, expected array ["autofocus", "scroll", "animationFrame"] length 3, got ["animationFrame"] length 1
```
TIMEOUT /html/semantics/embedded-content/media-elements/autoplay-allowed-by-feature-policy.https.sub.html (#41404)
- TIMEOUT [expected PASS] subtest: Feature-Policy header: autoplay * allows same-origin iframes.
```
Test timed out
```
OK /html/semantics/embedded-content/media-elements/seeking/seek-to-max-value.htm (#40626)
- FAIL [expected PASS] subtest: seek to Number.MAX_VALUE
```
assert_equals: currentTime after setting expected 5.153333333 but got 0
```
TIMEOUT [expected OK] /html/semantics/embedded-content/the-iframe-element/iframe_sandbox_navigate_other_frame_popup.sub.html (#39702)
- TIMEOUT [expected FAIL] subtest: Sandboxed iframe can not navigate other frame's popup
```
Test timed out
```
OK /paint-timing/fcp-only/fcp-video-frame.html (#42360)
- FAIL [expected PASS] subtest: Video should become contentful when first frame is loaded
```
assert_equals: First contentful paint marked too early.  expected 0 but got 1
```
OK /paint-timing/fcp-only/fcp-video-poster.html (#42359)
- FAIL [expected PASS] subtest: Video should become contentful when poster is loaded
```
assert_equals: First contentful paint marked too early.  expected 0 but got 1
```
OK /paint-timing/input-text.html (#42356)
- FAIL [expected PASS] subtest: Text from a form control triggers First Contentful Paint.
```
assert_equals: First contentful paint marked too early.  expected 0 but got 1
```
OK /paint-timing/with-first-paint/first-image-child.html (#42400)
- FAIL [expected PASS] subtest: Child iframe ignores paint-timing events fired from parent image rendering.
```
assert_equals: expected "0" but got "1 paint first-paint"
```
FAIL [expected PASS] /png/apng/fcTL-blend-source-transparent.html (#39520)
ERROR [expected OK] /resource-timing/cors-preflight.any.html (#28694)
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- PASS [expected TIMEOUT] subtest: Navigate a frame via anchor with javascript:-urls w/ default policy in report-only mode.
- FAIL [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ a default policy throwing an exception in enforcing mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
- FAIL [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ a default policy throwing an exception in report-only mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
TIMEOUT /trusted-types/trusted-types-navigation.html?31-35 (#38034)
- TIMEOUT [expected PASS] subtest: Navigate a frame via form-submission with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected TIMEOUT] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in report-only mode.
OK /visual-viewport/resize-event-order.html (#41981)
- PASS [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
OK /wasm/webapi/abort.any.html (#39966)
- FAIL [expected PASS] subtest: instantiateStreaming() asynchronously racing with abort should succeed or reject with AbortError
```
assert_equals: expected "AbortError" but got "CompileError"
```
OK /webdriver/tests/classic/delete_cookie/delete.py
- FAIL [expected PASS] subtest: test_null_response_value
```
AssertionError: no such window (404): No such window
```
OK /webdriver/tests/classic/delete_cookie/user_prompts.py
- FAIL [expected PASS] subtest: test_accept[alert-None]
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webdriver/tests/classic/find_elements/find.py
- ERROR [expected PASS] subtest: test_no_top_browsing_context
```
setup error: webdriver.error.NoSuchWindowException: no such window (404): No such window
```

Stable unexpected results that are known to be intermittent (39)

OK /FileAPI/url/url-with-fetch.any.worker.html (#21517)
- FAIL [expected PASS] subtest: Revoke blob URL after calling fetch, fetch should succeed
```
promise_test: Unhandled rejection with value: object "TypeError: Network error: Blob URL store error: InvalidFileID"
```

OK /IndexedDB/idbcursor-continuePrimaryKey-exceptions.any.html (#39277)

FAIL [expected PASS] subtest: IDBCursor continuePrimaryKey() on object store cursor

assert_throws_dom: continuePrimaryKey() should throw if source is not an index function "function() {
        cursor.continuePrimaryKey(2, 2);
      }" threw object "TypeError: cursor.continuePrimaryKey is not a function" that is not a DOMException InvalidAccessError: property "code" is equal to undefined, expected 15

OK /IndexedDB/idbcursor-continuePrimaryKey-exceptions.any.worker.html (#39277)

FAIL [expected PASS] subtest: IDBCursor continuePrimaryKey() on object store cursor

assert_throws_dom: continuePrimaryKey() should throw if source is not an index function "function() {
        cursor.continuePrimaryKey(2, 2);
      }" threw object "TypeError: cursor.continuePrimaryKey is not a function" that is not a DOMException InvalidAccessError: property "code" is equal to undefined, expected 15

OK /IndexedDB/idbobjectstore_getAll.any.html (#39276)
- PASS [expected FAIL] subtest: Get all values with transaction.commit()
OK /IndexedDB/idbobjectstore_getAll.any.worker.html (#39400)
- PASS [expected FAIL] subtest: Get all values with transaction.commit()
OK /IndexedDB/idbrequest-onupgradeneeded.any.html (#38895)
- PASS [expected FAIL] subtest: transaction oncomplete ordering relative to open request onsuccess
OK /IndexedDB/idbrequest-onupgradeneeded.any.worker.html (#38971)
- PASS [expected FAIL] subtest: transaction oncomplete ordering relative to open request onsuccess

OK /IndexedDB/key-conversion-exceptions.any.html (#39305)

FAIL [expected PASS] subtest: IDBCursor continue() method with throwing/invalid keys

assert_throws_exactly: key conversion with throwing getter should rethrow function "() =&gt; {
      receiver[method](key);
    }" threw object "TypeError: receiver[method] is not a function" but we expected it to throw object "getter: throwing from getter"

FAIL [expected PASS] subtest: IDBCursor update() method with throwing/invalid keys

assert_throws_exactly: throwing getter should rethrow during clone function "() =&gt; {
      cursor.update(value);
    }" threw object "TypeError: cursor.update is not a function" but we expected it to throw object "getter: throwing from getter"

OK /IndexedDB/key-conversion-exceptions.any.worker.html (#39284)

FAIL [expected PASS] subtest: IDBCursor continue() method with throwing/invalid keys

assert_throws_exactly: key conversion with throwing getter should rethrow function "() =&gt; {
      receiver[method](key);
    }" threw object "TypeError: receiver[method] is not a function" but we expected it to throw object "getter: throwing from getter"

FAIL [expected PASS] subtest: IDBCursor update() method with throwing/invalid keys

assert_throws_exactly: throwing getter should rethrow during clone function "() =&gt; {
      cursor.update(value);
    }" threw object "TypeError: cursor.update is not a function" but we expected it to throw object "getter: throwing from getter"

FAIL [expected PASS] /_mozilla/mozilla/sslfail.html (#10760)
TIMEOUT [expected OK] /_mozilla/mozilla/window_resize_event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
TIMEOUT /content-security-policy/inheritance/location-reload.html (#38983)
- FAIL [expected PASS] subtest: location.reload() of empty iframe.
```
assert_equals: Image should be blocked by CSP after reload. expected "img blocked" but got "img loaded"
```
TIMEOUT [expected OK] /credential-management/credentialscontainer-frame-basics.https.html (#39430)
- TIMEOUT [expected FAIL] subtest: navigator.credentials should be undefined in documents generated from data: URLs.
```
Test timed out
```
OK /css/css-cascade/layer-font-face-override.html (#35935)
- FAIL [expected PASS] subtest: @font-face override update with appended sheet 2
```
assert_equals: expected "80px" but got "38.3166666666667px"
```
OK /css/css-fonts/generic-family-keywords-001.html (#37467)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(fangsong)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(kai)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(khmer-mul)
OK /css/css-fonts/generic-family-keywords-003.html (#38994)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted system-ui (drawing text in a canvas)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(khmer-mul) (drawing text in a canvas)
OK /css/cssom-view/offsetTopLeft-border-box.html (#40826)
- PASS [expected FAIL] subtest: container: 0
- PASS [expected FAIL] subtest: container: 1
OK /custom-elements/form-associated/ElementInternals-setFormValue.html (#29174)
- PASS [expected FAIL] subtest: Single value - empty name exists
- PASS [expected FAIL] subtest: Single value - Non-empty name exists
- PASS [expected FAIL] subtest: Null value should submit nothing
- PASS [expected FAIL] subtest: Multiple values - name content attribute is ignored
- PASS [expected FAIL] subtest: setFormValue with an empty FormData should submit nothing
- PASS [expected FAIL] subtest: Newline normalization - \r\n in name (urlencoded)
- PASS [expected FAIL] subtest: Newline normalization - \n in value (formdata)
- PASS [expected FAIL] subtest: Newline normalization - \r\n in value (urlencoded)
- PASS [expected FAIL] subtest: Newline normalization - \r\n in value (formdata)
- PASS [expected FAIL] subtest: Newline normalization - \r\n in filename (urlencoded)
- And 5 more unexpected results...
ERROR [expected OK] /fetch/fetch-later/quota/same-origin-iframe/multiple-iframes.https.window.html (#35176)
OK /fetch/metadata/generated/css-font-face.https.sub.tentative.html (#32732)
- FAIL [expected PASS] subtest: sec-fetch-mode
```
promise_test: Unhandled rejection with value: object "Error: Failed to query for recorded headers."
```
OK /fetch/metadata/generated/css-font-face.sub.tentative.html (#34624)
- FAIL [expected PASS] subtest: sec-fetch-storage-access - Not sent to non-trustworthy same-site destination
```
promise_test: Unhandled rejection with value: object "Error: Failed to query for recorded headers."
```
- FAIL [expected PASS] subtest: sec-fetch-storage-access - Not sent to non-trustworthy cross-site destination
```
promise_test: Unhandled rejection with value: object "Error: Failed to query for recorded headers."
```
OK /fetch/metadata/generated/element-iframe.https.sub.html (#40341)
- PASS [expected FAIL] subtest: sec-fetch-user with user activation
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.html (#29056)
- FAIL [expected PASS] subtest: Cross-origin navigation started from unload handler must be ignored
```
promise_test: Unhandled rejection with value: object "SecurityError: The operation is insecure."
```

OK /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html (#28697)

FAIL [expected PASS] subtest: aElement.click() before the load event must NOT replace

assert_equals: expected "http://web-platform.test:8000/common/blank.html?thereplacement" but got "http://web-platform.test:8000/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html?pipe=sub(none)&amp;code=%0A%20%20%20%20const%20a%20%3D%20document.createElement(%22a%22)%3B%0A%20%20%20%20a.href%20%3D%20%22%2Fcommon%2Fblank.html%3Fthereplacement%22%3B%0A%20%20%20%20document.currentScript.before(a)%3B%0A%20%20%20%20a.click()%3B%0A%20%20"

OK /html/browsers/history/the-history-interface/traverse_the_history_3.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
TIMEOUT /html/semantics/embedded-content/media-elements/autoplay-disabled-by-feature-policy.https.sub.html (#41221)
- TIMEOUT [expected FAIL] subtest: Feature-Policy header: autoplay "none" disallows same-origin iframes.
```
Test timed out
```
OK /html/semantics/embedded-content/media-elements/media_fragment_seek.html (#24114)
- FAIL [expected PASS] subtest: Video should seek to time specified in media fragment syntax
```
assert_equals: expected 3 but got 0
```
OK /html/semantics/forms/form-submission-0/multipart-formdata.window.html (#28725)
- PASS [expected FAIL] subtest: multipart/form-data: Basic File test (formdata event)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in name (normal form)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in name (formdata event)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in value (normal form)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in value (formdata event)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in filename (normal form)
- PASS [expected FAIL] subtest: multipart/form-data: 0x00 in filename (formdata event)
- PASS [expected FAIL] subtest: multipart/form-data: \n in value (normal form)
- PASS [expected FAIL] subtest: multipart/form-data: \n in value (formdata event)
- PASS [expected FAIL] subtest: multipart/form-data: \r\n in value (normal form)
- And 19 more unexpected results...
OK /html/semantics/forms/form-submission-0/text-plain.window.html (#28687)
- PASS [expected FAIL] subtest: text/plain: Basic File test (formdata event)
- PASS [expected FAIL] subtest: text/plain: 0x00 in name (normal form)
- PASS [expected FAIL] subtest: text/plain: 0x00 in name (formdata event)
- PASS [expected FAIL] subtest: text/plain: 0x00 in value (normal form)
- PASS [expected FAIL] subtest: text/plain: 0x00 in value (formdata event)
- PASS [expected FAIL] subtest: text/plain: 0x00 in filename (normal form)
- PASS [expected FAIL] subtest: text/plain: 0x00 in filename (formdata event)
- PASS [expected FAIL] subtest: text/plain: \r\n in name (normal form)
- PASS [expected FAIL] subtest: text/plain: \r\n in name (formdata event)
- PASS [expected FAIL] subtest: text/plain: \r\n in value (normal form)
- And 25 more unexpected results...
OK /html/semantics/forms/form-submission-0/urlencoded2.window.html (#28687)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: Basic File test (formdata event)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in name (normal form)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in name (formdata event)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in value (normal form)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in value (formdata event)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in filename (normal form)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: 0x00 in filename (formdata event)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: \r\n in name (normal form)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: \r\n in name (formdata event)
- PASS [expected FAIL] subtest: application/x-www-form-urlencoded: \r\n in value (normal form)
- And 31 more unexpected results...

OK [expected TIMEOUT] /html/semantics/forms/form-submission-target/rel-base-target.html (#40379)

FAIL [expected PASS] subtest: <form rel=""> with <base target>

assert_equals: referrer expected "http://web-platform.test:8000/html/semantics/forms/form-submission-target/rel-base-target.html" but got ""

FAIL [expected PASS] subtest: <form rel="noopener"> with <base target>

assert_equals: referrer expected "http://web-platform.test:8000/html/semantics/forms/form-submission-target/rel-base-target.html" but got ""

FAIL [expected PASS] subtest: <form rel="opener"> with <base target>

assert_equals: referrer expected "http://web-platform.test:8000/html/semantics/forms/form-submission-target/rel-base-target.html" but got ""

FAIL [expected PASS] subtest: <form rel="opener noopener"> with <base target>

assert_equals: referrer expected "http://web-platform.test:8000/html/semantics/forms/form-submission-target/rel-base-target.html" but got ""

TIMEOUT [expected ERROR] /html/semantics/links/links-created-by-a-and-area-elements/target_blank_implicit_noopener_base.html (#40347)
- TIMEOUT [expected PASS] subtest: Area element with base target=_blank with rel=noopener
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: Area element with base target=_blank with rel=opener
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: Area element with base target=_blank with implicit rel=noopener
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: Area element with base target=_blank with rel=opener+noopener
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: Area element with base target=_blank with rel=noopener+opener
```
Test timed out
```
OK /navigation-timing/test-navigation-type-reload.html (#33334)
- FAIL [expected PASS] subtest: Reload domContentLoadedEventEnd > Original domContentLoadedEventEnd
```
assert_true: Reload domContentLoadedEventEnd &gt; Original domContentLoadedEventEnd expected true got false
```
OK /resource-timing/test_resource_timing.html (#25720)
- PASS [expected FAIL] subtest: window.performance.getEntriesByName() and window.performance.getEntriesByNameType() return same data (iframe)
- FAIL [expected NOTRUN] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (link)
```
assert_equals: expected 15.879999999999995 but got 15.87
```
OK /resource-timing/test_resource_timing.https.html (#25216)
- PASS [expected FAIL] subtest: window.performance.getEntriesByName() and window.performance.getEntriesByNameType() return same data (iframe)
- FAIL [expected PASS] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (img)
```
assert_equals: expected 13.519999999999996 but got 13.51
```
OK /service-workers/service-worker/fetch-event.https.html (#36234)
- PASS [expected FAIL] subtest: Service Worker falls back to network in fetch event with POST form
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- TIMEOUT [expected PASS] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.
OK [expected TIMEOUT] /webmessaging/with-ports/017.html (#24486)
- PASS [expected TIMEOUT] subtest: origin of the script that invoked the method, about:blank
OK [expected TIMEOUT] /webmessaging/without-ports/017.html (#24486)
- PASS [expected TIMEOUT] subtest: origin of the script that invoked the method, about:blank

Stable unexpected results (1)

OK /html/dom/idlharness.https.html?include=HTML.+
- PASS [expected FAIL] subtest: HTMLIFrameElement interface: attribute loading
- PASS [expected FAIL] subtest: HTMLIFrameElement interface: document.createElement("iframe") must inherit property "loading" with the proper type

github-actions · 2026-02-07T10:19:47Z

⚠️ Try run (#21778154557) failed!

TimvdLippe · 2026-02-07T12:53:41Z

.../html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-to-eager-srcdoc.html

@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<head>
+  <title>Below-viewport srcdoc iframes with loading='lazy' load when set to


Verified this test passes now in Servo and Gecko. In Chromium it fails, but Chromium also fails the related test: https://wpt.fyi/results/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html?label=experimental&label=master&aligned

Note that this test is almost equivalent to tests/wpt/tests/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-to-eager.html, but uses srcdoc instead of src. That's the test coverage which was missing, which is why WPT didn't report any changes before.

TimvdLippe · 2026-02-07T12:55:48Z

components/script_bindings/webidls/HTMLIFrameElement.webidl

-  //         attribute boolean seamless;
-  [CEReactions]
-           attribute boolean allowFullscreen;
+  [CEReactions] attribute USVString src;


Figured to literally copy the webidl definition from the spec, since things were moved around and seamless (the previous name of loading afaik) no longer exists.

servo-wpt-sync · 2026-02-07T12:56:00Z

🤖 Opened new upstream WPT pull request (web-platform-tests/wpt#57638) with upstreamable changes.

servo-wpt-sync · 2026-02-08T10:55:05Z

📝 Transplanted new upstreamable changes to existing upstream WPT pull request (web-platform-tests/wpt#57638).

servo-wpt-sync · 2026-02-24T19:34:42Z

📝 Transplanted new upstreamable changes to existing upstream WPT pull request (web-platform-tests/wpt#57638).

jdm

Nice!

Align with the spec and implement part of its lazy loading steps. Most tests use non-srcdoc lazy loading URLs, so most tests will not pass until the other parts are implemented as well. Signed-off-by: Tim van der Lippe <[email protected]>

servo-wpt-sync · 2026-02-25T15:26:37Z

📝 Transplanted new upstreamable changes to existing upstream WPT pull request (web-platform-tests/wpt#57638).

Align with the spec and implement part of its lazy loading steps. Most tests use non-srcdoc lazy loading URLs, so most tests will not pass until the other parts are implemented as well. Signed-off-by: Tim van der Lippe <[email protected]>

TimvdLippe force-pushed the update-about-srcdoc branch 2 times, most recently from 5613ac5 to 6149e69 Compare February 7, 2026 09:47

TimvdLippe added the T-linux-wpt Do a try run of the WPT label Feb 7, 2026

github-actions bot removed the T-linux-wpt Do a try run of the WPT label Feb 7, 2026

TimvdLippe force-pushed the update-about-srcdoc branch from 6149e69 to 4860f0a Compare February 7, 2026 12:52

TimvdLippe marked this pull request as ready for review February 7, 2026 12:52

TimvdLippe requested a review from gterzian as a code owner February 7, 2026 12:52

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Feb 7, 2026

TimvdLippe commented Feb 7, 2026

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servo-wpt-sync mentioned this pull request Feb 7, 2026

script: Fix loading of about:srcdoc documents web-platform-tests/wpt#57638

Merged

TimvdLippe requested a review from jdm February 7, 2026 13:53

TimvdLippe force-pushed the update-about-srcdoc branch from 4860f0a to 17870c6 Compare February 8, 2026 10:51

TimvdLippe force-pushed the update-about-srcdoc branch from 17870c6 to 8b53b01 Compare February 24, 2026 19:28

jdm approved these changes Feb 24, 2026

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servo-highfive removed the S-awaiting-review There is new code that needs to be reviewed. label Feb 24, 2026

TimvdLippe enabled auto-merge February 24, 2026 19:43

TimvdLippe added this pull request to the merge queue Feb 24, 2026

servo-highfive added the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Feb 24, 2026

github-merge-queue bot removed this pull request from the merge queue due to failed status checks Feb 24, 2026

servo-highfive added S-tests-failed The changes caused existing tests to fail. and removed S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. labels Feb 24, 2026

script: Fix loading of about:srcdoc documents

2385706

Align with the spec and implement part of its lazy loading steps. Most tests use non-srcdoc lazy loading URLs, so most tests will not pass until the other parts are implemented as well. Signed-off-by: Tim van der Lippe <[email protected]>

TimvdLippe force-pushed the update-about-srcdoc branch from 8b53b01 to 2385706 Compare February 25, 2026 15:21

servo-highfive added S-awaiting-review There is new code that needs to be reviewed. and removed S-tests-failed The changes caused existing tests to fail. labels Feb 25, 2026

TimvdLippe enabled auto-merge February 25, 2026 15:21

TimvdLippe added this pull request to the merge queue Feb 25, 2026

servo-highfive added the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Feb 25, 2026

github-merge-queue bot removed this pull request from the merge queue due to failed status checks Feb 25, 2026

servo-highfive added S-tests-failed The changes caused existing tests to fail. and removed S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. labels Feb 25, 2026

TimvdLippe added this pull request to the merge queue Feb 25, 2026

servo-highfive added S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. and removed S-tests-failed The changes caused existing tests to fail. labels Feb 25, 2026

Merged via the queue into servo:main with commit 756af3b Feb 25, 2026
39 checks passed

TimvdLippe deleted the update-about-srcdoc branch February 25, 2026 20:51

servo-highfive removed the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Feb 25, 2026

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script: Fix loading of about:srcdoc documents#41959

script: Fix loading of about:srcdoc documents#41959
TimvdLippe merged 1 commit intoservo:mainfrom
TimvdLippe:update-about-srcdoc

TimvdLippe commented Jan 16, 2026 •

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TimvdLippe commented Jan 16, 2026 •

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