css: Implement `touch-action` (Except for pan-{up,down,left,right} that Stylo does not support) by yezhizhen · Pull Request #47043 · servo/servo

yezhizhen · 2026-08-06T08:38:07Z

Motivated by #46983 to get this to the end.

This has 44.1736% usage percentage as listed in Chrome report, and controls the most basic interaction rule with touch.

Stylo PR: servo/stylo#439

Testing: Only new passing. No new failure. All of them are pointerevents tests so demonstrate quite the value.

yezhizhen

The implementation is based on test expectation in

servo/tests/wpt/tests/pointerevents/touch-action-with-swipe-dir-change.html

Lines 49 to 57 in 0d31f6f

    
           const promise_test_params = [ 
        
             ["auto",  ["right", "down"], true,  true ], 
        
             ["auto",  ["down", "right"], true,  true ], 
        
             ["pan-x", ["right", "down"], true,  false], 
        
             ["pan-x", ["down", "right"], false, false], 
        
             ["pan-y", ["right", "down"], false, false], 
        
             ["pan-y", ["down", "right"], false, true ], 
        
             ["none" , ["right", "down"], false, false], 
        
             ["none" , ["down", "right"], false, false],

and MDN, which explains very well. Also tested with Chrome&Firefox.

Btw, firefox itself also does not suppot parsing direcitonal value (pan-{up, down...}):

https://github.com/servo/stylo/blob/127b0b5cab6a6927552e889debb20beb031b79d1/style/values/specified/box.rs#L1298-L1312

yezhizhen · 2026-08-06T08:42:01Z

-        /// scroll.
+        /// This node can be scrolled by mouse wheel or other non-touch input events, or
+        /// such an input event originated this scroll.
        const InputEvents = 1 << 0;


The naming is a bit awkward. I am not sure about NonTouchInputEvents ..

yezhizhen · 2026-08-06T09:07:25Z

                    viewport_details.layout_size(),
                ),
                scroll_sensitivity: viewport_scroll_sensitivity,
+                touch_action: TouchAction::Auto,


We are hard coding this only in viewport scroll node in PaintDisplayListInfo::new. As style is not determined yet.

github-actions · 2026-08-09T10:57:01Z

🔨 Triggering try run (#31309574014) for Linux (WPT)

github-actions · 2026-08-09T11:32:42Z

Test results for linux-wpt from try job (#31309574014):

Flaky unexpected result (40)

TIMEOUT [expected OK] /IndexedDB/idbcursor-continue-exception-order.any.sharedworker.html
- TIMEOUT [expected FAIL] subtest: IDBCursor.continue exception order: TransactionInactiveError vs. DataError
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: IDBCursor.continue exception order: TransactionInactiveError vs. InvalidStateError
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: IDBCursor.continue exception order: InvalidStateError vs. DataError
```
Test timed out
```
ERROR [expected OK] /_mozilla/mozilla/iframe-contentDocument.html
TIMEOUT [expected OK] /_webgl/conformance/reading/read-pixels-test.html
CRASH [expected OK] /_webgl/conformance/uniforms/no-over-optimization-on-uniform-array-14.html
TIMEOUT [expected OK] /_webgl/conformance/uniforms/no-over-optimization-on-uniform-array-16.html
- NOTRUN [expected PASS] subtest: Overall test
TIMEOUT [expected OK] /_webgl/conformance2/sync/sync-webgl-specific.html
FAIL [expected PASS] /css/css-backgrounds/background-size-042.html
FAIL [expected PASS] /css/css-sizing/dynamic-available-size-iframe.html (#45763)
TIMEOUT [expected CRASH] /editing/whitespaces/chrome-compat/inserttext.tentative.html
TIMEOUT [expected OK] /fetch/content-encoding/br/big-br-body.https.any.html
- TIMEOUT [expected PASS] subtest: large br data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large br data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/br/big-br-body.https.any.worker.html
- TIMEOUT [expected PASS] subtest: large br data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large br data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/gzip/big-gzip-body.https.any.sharedworker.html
- TIMEOUT [expected PASS] subtest: large gzip data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large gzip data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/zstd/big-zstd-body.https.any.worker.html
- TIMEOUT [expected PASS] subtest: large zstd data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large zstd data should be decompressed successfully with byte stream
OK [expected ERROR] /fetch/fetch-later/quota/same-origin-iframe/multiple-iframes.https.window.html (#35176)
TIMEOUT /fetch/metadata/generated/css-images.sub.tentative.html (#29047)
- TIMEOUT [expected PASS] subtest: background-image sec-fetch-site - Not sent to non-trustworthy same-origin destination
```
Test timed out
```
- 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/refresh/same-document-refresh.html (#34597)
- PASS [expected FAIL] subtest: Same-Document Referrer from Refresh
CRASH [expected ERROR] /html/browsers/history/the-location-interface/location_replace_session_history.html (#41896)
OK /html/browsers/windows/embedded-opener-remove-frame.html (#23867)
- PASS [expected FAIL] subtest: opener of discarded auxiliary browsing context
TIMEOUT /html/semantics/embedded-content/media-elements/autoplay-allowed-by-permissions-policy.https.sub.html (#46803)
- PASS [expected TIMEOUT] subtest: Permissions-Policy header: autoplay * allows same-origin iframes.
TIMEOUT /html/semantics/embedded-content/media-elements/autoplay-disabled-by-permissions-policy.https.sub.html (#46012, #46804)
- TIMEOUT [expected FAIL] subtest: Permissions-Policy header: autoplay "none" disallows same-origin iframes.
```
Test timed out
```
ERROR [expected OK] /html/semantics/embedded-content/media-elements/playing-the-media-resource/loop-from-ended.tentative.html (#33778)
TIMEOUT [expected OK] /html/semantics/embedded-content/media-elements/track/track-element/track-mode-disabled.html
- TIMEOUT [expected PASS] subtest: Cues are properly removed from the active cue list when their track changes mode to disabled
```
Test timed out
```
OK /html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-reload-location-reload.html (#32595)
- FAIL [expected PASS] subtest: Reloading iframe loading='lazy' before it is loaded: location.reload
```
uncaught exception: Error: assert_equals: expected "http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/support/blank.htm?src" but got "about:blank"
```
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
```
CRASH [expected ERROR] /html/semantics/forms/the-select-element/customizable-select/select-appearance-button-after-span.html
TIMEOUT [expected OK] /html/syntax/parsing/html5lib_write.html?file=tests7
- TIMEOUT [expected PASS] subtest: <!doctype html><body><title>X</title>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html><table><title>X</title></table>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html><head></head><title>X</title>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html></head><title>X</title>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html></head><base>X
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html></head><basefont>X
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html></head><bgsound>X
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <!doctype html><table><meta></table>
```
Test timed out
```
- NOTRUN [expected PASS] subtest: <!doctype html><table>X<tr><td><table> <meta></table></table>
- NOTRUN [expected PASS] subtest: <!doctype html><html> <head>
- And 23 more unexpected results...
OK /html/webappapis/dynamic-markup-insertion/document-write/module-tla-import.html (#42419)
- FAIL [expected PASS] subtest: document.write in an imported module
```
assert_true: onload must be called expected true got false
```
CRASH [expected OK] /navigation-timing/prefetch-transfer-size-executor.html
TIMEOUT [expected OK] /pointerevents/compat/pointerevent_touch-action_two-finger_interaction.html (#44693)
- NOTRUN [expected PASS] subtest: touch two-finger pan on 'touch-action: pan-x pan-y'
- NOTRUN [expected FAIL] subtest: touch two-finger pan on 'touch-action: pinch-zoom'

OK /pointerevents/compat/pointerevent_touch_target_after_pointerdown_target_removed.tentative.html (#42813)

FAIL [expected PASS] subtest:

After a pointerdown listener removes its target, touch events should be fired on the touchstart target even though an orphan and pointer events should be fired on the parent

assert_equals: expected "[ { type: pointerdown, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: touchstart, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchend, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; } ]" but got "[ { type: pointerdown, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: touchstart, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchend, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerdown, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; } ]"

FAIL [expected PASS] subtest: After a pointerdown listener removes its target, touchmove event should be fired on the pointerdown target

assert_equals: expected "[ { type: pointerdown, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: touchstart, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchmove, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchend, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; } ]" but got "[ { type: pointerdown, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: touchstart, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchmove, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: touchend, target: Element node &lt;div id=\"pointerDownTarget\"&gt;&lt;/div&gt; }, { type: pointermove, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerdown, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; }, { type: pointerup, target: Element node &lt;div id=\"pointerDownTargetParent\"&gt;&lt;/div&gt; } ]"

PASS [expected FAIL] subtest: After a touchstart listener removes its target, touch events should be fired on the touchstart target even though an orphan and pointer events should be fired on the parent
PASS [expected FAIL] subtest: After a touchstart listener removes its target, touchmove event should be fired on the pointerdown target

OK /resource-timing/buffer-full-add-then-clear.html (#40819)
- FAIL [expected PASS] subtest: Test that if the buffer is cleared after entries were added to the secondary buffer, those entries make it into the primary one
```
assert_equals: Number of entries does not match the expected value. expected 3 but got 0
```
CRASH [expected OK] /trusted-types/require-trusted-types-for.html
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?16-20 (#44835)
- TIMEOUT [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: Navigate a frame via area with javascript:-urls in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in report-only mode.
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?26-30 (#38807)
- PASS [expected TIMEOUT] subtest: Navigate a window via form-submission with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via form-submission with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls in enforcing mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in enforcing mode.
OK /upgrade-insecure-requests/gen/sharedworker-module-data.meta/unset/fetch.https.html
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
OK /upgrade-insecure-requests/gen/sharedworker-module-data.meta/upgrade/fetch.https.html
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to cross-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to cross-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to cross-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to same-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to same-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for fetch to same-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
OK /webdriver/tests/classic/accept_alert/accept.py (#43194)
- FAIL [expected PASS] subtest: test_accept_in_popup_window
```
AssertionError: no such alert (404): No user prompt is currently active.
```
TIMEOUT [expected OK] /webstorage/storage_local_setitem_quotaexceedederr.window.html
TIMEOUT [expected OK] /webstorage/storage_session_setitem_quotaexceedederr.window.html

Stable unexpected results that are known to be intermittent (16)

OK /beacon/beacon-basic.https.window.html (#41723)
- FAIL [expected PASS] subtest: Payload size restriction should be accumulated: type = arraybuffer
```
assert_false: expected false got true
```
- FAIL [expected PASS] subtest: Payload size restriction should be accumulated: type = blob
```
assert_false: expected false got true
```
OK /css/css-fonts/variations/at-font-face-font-matching.html (#20684)
- FAIL [expected PASS] subtest: Matching font-weight: '430' should prefer '501 550' over '502 560'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-weight: '500' should prefer '400' over '350 399'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-weight: '500' should prefer '351 398' over '501 550'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-weight: '399' should prefer '200 300' over '400'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-style: 'oblique 0deg' should prefer 'oblique 15deg 20deg' over 'oblique 30deg 60deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
FAIL [expected PASS] /css/css-text-decor/text-underline-position-from-font-variable.html (#45615)
OK /dom/nodes/moveBefore/iframe-document-preserve.window.html (#43152)
- PASS [expected FAIL] subtest: moveBefore(): cross-origin iframe is preserved: remove new parent
- PASS [expected FAIL] subtest: moveBefore(): cross-origin iframe is preserved: remove self
- FAIL [expected PASS] subtest: moveBefore(): cross-origin iframe is preserved: remove self via innerHTML
```
assert_equals: iframe does not fire a second load event expected 1 but got 0
```
OK [expected ERROR] /focus/focus-event-after-switching-iframes.sub.html (#40368)
OK /html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html (#28691)
- PASS [expected FAIL] subtest: load event does not fire on window.open('about:blank')
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html (#20768)
- FAIL [expected PASS] subtest: Tests that a fragment navigation in the unload handler will not block the initial navigation
```
assert_equals: expected "" but got "#fragment"
```

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/interaction/focus/the-autofocus-attribute/autofocus-dialog.html (#29087)
- PASS [expected TIMEOUT] subtest: <dialog>-contained autofocus element gets focused when the dialog is shown
TIMEOUT [expected OK] /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)
- TIMEOUT [expected FAIL] subtest: Host element with delegatesFocus including no focusable descendants should be skipped
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: Area element should support autofocus
TIMEOUT [expected OK] /html/interaction/focus/the-autofocus-attribute/update-the-rendering.html (#24145)
- TIMEOUT [expected FAIL] subtest: "Flush autofocus candidates" should be happen before a scroll event and animation frame callbacks
```
Test timed out
```
TIMEOUT [expected OK] /html/syntax/parsing/html5lib_write.html?file=processing-instructions (#46205)
- TIMEOUT [expected FAIL] subtest: <table><?something></table>
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: <table><tr><?something></tr></table>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <script><?something></script>
```
Test timed out
```
TIMEOUT [expected OK] /html/syntax/parsing/html5lib_write_single.html?file=processing-instructions (#46206)
- TIMEOUT [expected FAIL] subtest: <?something>
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: <html><?something><head>
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: <html><head></head><?something><body>
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: <html><body></body><?something>
```
Test timed out
```
- TIMEOUT [expected FAIL] subtest: <html><body></body></html><?something>
```
Test timed out
```
OK /html/webappapis/user-prompts/print-during-unload.html (#35944)
- PASS [expected FAIL] subtest: print() during unload
OK /pointerevents/pointerevent_change-touch-action-onpointerdown_touch.html (#46781)
- FAIL [expected PASS] subtest: scroll should be received before the test finishes
```
assert_true: scroll should be received before the test finishes expected true got false
```
OK /resource-timing/test_resource_timing.html (#25720)
- PASS [expected FAIL] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (img)
- PASS [expected FAIL] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (script)

github-actions · 2026-08-09T11:32:49Z

✨ Try run (#31309574014) succeeded.

yezhizhen · 2026-08-10T04:23:18Z

@mrobinson Pls help review.

Narfinger

Just some small nits but somebody else might want to look at it.

github-actions · 2026-08-24T13:13:37Z

🔨 Triggering try run (#32731414779) for Linux (WPT)

github-actions · 2026-08-24T13:51:08Z

Test results for linux-wpt from try job (#32731414779):

Flaky unexpected result (40)

ERROR [expected OK] /_mozilla/mozilla/iframe-contentDocument.html
TIMEOUT [expected OK] /_webgl/conformance/reading/read-pixels-test.html
CRASH [expected OK] /_webgl/conformance/textures/misc/tex-image-and-sub-image-2d-with-array-buffer-view.html
CRASH [expected OK] /_webgl/conformance/uniforms/no-over-optimization-on-uniform-array-06.html
TIMEOUT [expected OK] /_webgl/conformance/uniforms/no-over-optimization-on-uniform-array-16.html
- NOTRUN [expected PASS] subtest: Overall test
TIMEOUT [expected OK] /_webgl/conformance2/state/gl-object-get-calls.html
- NOTRUN [expected PASS] subtest: Overall test
TIMEOUT [expected OK] /_webgl/conformance2/sync/sync-webgl-specific.html
ERROR [expected TIMEOUT] /css/css-sizing/responsive-iframe/responsive-iframe-allow-origins.html?container=subdomain,origin=cross,allowed=wildcard,expect=400 (#47268)
OK [expected TIMEOUT] /fetch/api/redirect/redirect-keepalive.https.any.html (#32153)
- PASS [expected TIMEOUT] subtest: [keepalive][iframe][load] mixed content redirect; setting up
TIMEOUT [expected OK] /fetch/content-encoding/br/big-br-body.https.any.html
- TIMEOUT [expected PASS] subtest: large br data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large br data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/br/big-br-body.https.any.worker.html
- TIMEOUT [expected PASS] subtest: large br data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large br data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/gzip/big-gzip-body.https.any.worker.html
- TIMEOUT [expected PASS] subtest: large gzip data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large gzip data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/zstd/big-window-zstd-body.tentative.https.any.worker.html
- TIMEOUT [expected FAIL] subtest: Consuming the body of a resource with too large of a zstd window size should reject
```
Test timed out
```
TIMEOUT [expected OK] /fetch/content-encoding/zstd/big-zstd-body.https.any.html
- TIMEOUT [expected PASS] subtest: large zstd data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large zstd data should be decompressed successfully with byte stream
OK [expected ERROR] /fetch/fetch-later/quota/same-origin-iframe/sandboxed-iframe.https.window.html (#41704)
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 [expected TIMEOUT] /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit.html (#44098)

FAIL [expected TIMEOUT] subtest: Replace before load, triggered by formElement.requestSubmit()

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%20form%20%3D%20document.createElement(%22form%22)%3B%0A%20%20%20%20form.action%20%3D%20%22%2Fcommon%2Fblank.html%22%3B%0A%0A%20%20%20%20const%20input%20%3D%20document.createElement(%22input%22)%3B%0A%20%20%20%20input.type%20%3D%20%22hidden%22%3B%0A%20%20%20%20input.name%20%3D%20%22thereplacement%22%3B%0A%20%20%20%20form.append(input)%3B%0A%0A%20%20%20%20document.currentScript.before(form)%3B%0A%20%20%20%20form.requestSubmit()%3B%0A%20%20"

OK [expected TIMEOUT] /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html (#44028)
CRASH [expected OK] /html/dom/render-blocking/remove-element-unblocks-rendering.optional.html
OK [expected TIMEOUT] /html/semantics/embedded-content/media-elements/autoplay-allowed-by-permissions-policy.https.sub.html (#46803)
- PASS [expected TIMEOUT] subtest: Permissions-Policy header: autoplay * allows same-origin iframes.
OK /html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-nav-location-replace-set-src.html (#32697)
- PASS [expected FAIL] subtest: Navigating iframe loading='lazy' and then setting src: location.replace
TIMEOUT [expected OK] /html/semantics/forms/form-submission-0/form-submit-iframe-then-location-navigate.html (#29634)
- TIMEOUT [expected FAIL] subtest: Verifies that location navigations take precedence when following form submissions.
```
Test timed out
```
CRASH [expected ERROR] /html/semantics/forms/the-select-element/customizable-select/select-appearance-button-after-span.html
OK /html/syntax/speculative-parsing/expect-no-linked-resources/no-speculative-fetch.tentative.optional.html (#47290)
- PASS [expected FAIL] subtest: expect-no-linked-resources hint was ignored
OK /html/webappapis/dynamic-markup-insertion/document-write/iframe_005.html (#43671)
- PASS [expected FAIL] subtest: document.write external script into iframe write back into parent

OK /html/webappapis/user-prompts/print-during-unload.html (#35944)

FAIL [expected PASS] subtest: print() during unload

assert_array_equals: expected property 1 to be "destination" but got "error: window.print is not a function" (expected array ["start", "destination"] got ["start", "error: window.print is not a function"])

OK /infrastructure/testdriver/click_window.html (#47303)
- FAIL [expected PASS] subtest: TestDriver click method in window
```
Unhandled rejection: assert_unreached: click failed Reached unreachable code
```
OK /mixed-content/tentative/autoupgrades/mixed-content-cors.https.sub.html (#41123)
- FAIL [expected PASS] subtest: Cross-Origin video should get upgraded even if CORS is set
```
assert_equals: Length. Other host expected 1 but got Infinity
```
OK /paint-timing/fcp-only/fcp-text-input.html
- PASS [expected FAIL] subtest: Text input should become contentful when its value is non-empty
TIMEOUT [expected OK] /pointerevents/compat/pointerevent_touch-action_two-finger_interaction.html (#44693)
- NOTRUN [expected PASS] subtest: touch two-finger pan on 'touch-action: pan-x pan-y'
- NOTRUN [expected FAIL] subtest: touch two-finger pan on 'touch-action: pinch-zoom'
TIMEOUT [expected OK] /resource-timing/tentative/initiator-url/module-script-from-worker.html
- TIMEOUT [expected FAIL] subtest: The initiator Url for a script imported from a worker must be the worker script
```
Test timed out
```
OK /sanitizer-api/sanitizer-inert-document.html (#45260)
- PASS [expected FAIL] subtest: Test whether setHTML loads the image.
- FAIL [expected PASS] subtest: Test whether setHTMLUnsafe loads the image.
```
promise_test: Unhandled rejection with value: "The server observed a request. It shouldn't have."
```
OK /touch-events/hover-state-caused-by-compatibility-mouse-events.tentative.html (#46277)
- PASS [expected FAIL] subtest: The compatibility mouse events should set :hover: The compatibility mouse events should be fired
- PASS [expected FAIL] subtest: The compatibility mouse events should set :hover, but shouldn't be preserved after the target is replaced: The compatibility mouse events should be fired
OK /touch-events/mouseevents-after-touchend.tentative.html (#46497)
- PASS [expected FAIL] subtest: Tapping too far points should not cause a dblclick
OK /touch-events/single-tap-when-touchend-listener-use-sync-xhr.html (#41175)
- PASS [expected FAIL] subtest: Click event should be fired when touchend opens synchronous XHR
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?26-30 (#38807)
- PASS [expected TIMEOUT] subtest: Navigate a window via form-submission with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via form-submission with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls in enforcing mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in enforcing mode.
TIMEOUT /trusted-types/trusted-types-navigation.html?31-35 (#38034)
- PASS [expected TIMEOUT] subtest: Navigate a frame via form-submission with javascript:-urls in report-only mode.
- TIMEOUT [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in report-only mode.
```
Test timed out
```
CRASH [expected OK] /uievents/mouse/mousemove_prevent_default_action.html
OK /webdriver/tests/classic/execute_async_script/window.py
- FAIL [expected PASS] subtest: test_web_reference[frame]
```
AssertionError: script timeout (500)
```
CRASH [expected OK] /webstorage/storage_session_setitem_quotaexceedederr.window.html

Stable unexpected results that are known to be intermittent (18)

TIMEOUT [expected OK] /_mozilla/mozilla/window-resize-event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)
- 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
```
- FAIL [expected PASS] subtest: WebGL test #65
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #67
```
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 #69
- PASS [expected FAIL] subtest: WebGL test #71
- And 2 more unexpected results...
OK /css/css-flexbox/text-as-flexitem-size-001.html (#47104)
- PASS [expected FAIL] subtest: .flexbox > div 1
- PASS [expected FAIL] subtest: .flexbox > div 2
- PASS [expected FAIL] subtest: .flexbox > div 5
- PASS [expected FAIL] subtest: .flexbox > div 8
- PASS [expected FAIL] subtest: .flexbox > div 11
OK /css/css-fonts/variations/at-font-face-font-matching.html (#20684)
- FAIL [expected PASS] subtest: Matching font-weight: '430' should prefer '420 440' over '450 460'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-stretch: '100%' should prefer '110% 120%' over '115% 116%'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-stretch: '90%' should prefer '90% 100%' over '50% 80%'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-style: 'oblique 10deg' should prefer 'oblique 5deg' over 'oblique 15deg 20deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-style: 'oblique 10deg' should prefer 'oblique 40deg 50deg' over 'oblique 0deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
ERROR [expected OK] /css/css-sizing/responsive-iframe/responsive-iframe-allow-origins.html?container=subdomain,origin=same,allowed=wildcard,expect=400 (#47268)
PASS [expected FAIL] /css/css-text-decor/text-underline-position-from-font-variable.html (#45615)
TIMEOUT /fetch/metadata/generated/css-images.sub.tentative.html (#29047)
- TIMEOUT [expected PASS] subtest: background-image sec-fetch-site - Not sent to non-trustworthy same-origin destination
```
Test timed out
```
- FAIL [expected PASS] subtest: content sec-fetch-site - HTTPS downgrade-upgrade
```
assert_unreached: Reached unreachable code
```
OK [expected TIMEOUT] /html/semantics/embedded-content/media-elements/autoplay-disabled-by-permissions-policy.https.sub.html (#46012, #46804)
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 [expected TIMEOUT] /html/semantics/embedded-content/media-elements/src_object_blob.html (#40340)
- PASS [expected TIMEOUT] subtest: HTMLMediaElement.srcObject blob
TIMEOUT [expected OK] /largest-contentful-paint/performance-entry-sequence.html (#47373)
- TIMEOUT [expected PASS] subtest: Exactly one LargestContentfulPaint entry is emitted per frame when a new candidate is rendered
```
Test timed out
```
OK /pointerevents/pointerevent_change-touch-action-onpointerdown_touch.html (#46781)
- FAIL [expected PASS] subtest: scroll should be received before the test finishes
```
assert_true: scroll should be received before the test finishes expected true got false
```
OK /pointerevents/pointerevent_pointercapture_in_frame.html?pen (#45536)
- PASS [expected FAIL] subtest: Test penpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture.
OK /pointerevents/pointerevent_pointercapture_in_frame.html?touch (#45445)
- PASS [expected FAIL] subtest: Test touchpointer capture in same-origin frame: Pointer down at inner frame and set pointer capture.
OK /resource-timing/buffer-full-add-then-clear.html (#40819)
- PASS [expected FAIL] subtest: Test that if the buffer is cleared after entries were added to the secondary buffer, those entries make it into the primary one
OK /resource-timing/buffer-full-then-increased.html (#44408)
- FAIL [expected PASS] subtest: Test that overflowing the buffer and immediately increasing its limit does not trigger the resourcetimingbufferfull event
```
assert_equals: Number of entries does not match the expected value. expected 3 but got 1
```
TIMEOUT /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- FAIL [expected TIMEOUT] subtest: Navigate a frame via anchor with javascript:-urls in report-only mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
- TIMEOUT [expected NOTRUN] subtest: Navigate a frame via anchor with javascript:-urls w/ default policy in report-only mode.
```
Test timed out
```
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?16-20 (#44835)
- TIMEOUT [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: Navigate a frame via area with javascript:-urls in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in report-only mode.

github-actions · 2026-08-24T13:51:19Z

✨ Try run (#32731414779) succeeded.

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

Servo PR: servo/servo#47043 Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

…ervo#47890) Updated 9 more tests in similar fashion to web-platform-tests/wpt#62498. I missed these in first patch as I was only focusing on [try run here](https://github.com/servo/servo/actions/runs/33942192665). Testing: Safari and Servo no longer WebDriver out of bound, and checked in Firefox under 800x600. Updated expectations. Some new passing is due to servo#47043 earlier. Fixes: web-platform-tests/wpt#62481 --------- Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

…at Stylo does not support) (servo#47043) Motivated by servo#46983 to get this to the end. This has 44.1736% usage percentage as listed in Chrome report, and controls the most basic interaction rule with touch. Stylo PR: servo/stylo#439 Testing: Only new passing. No new failure. All of them are pointerevents tests so demonstrate quite the value. --------- Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

…ervo#47890) Updated 9 more tests in similar fashion to web-platform-tests/wpt#62498. I missed these in first patch as I was only focusing on [try run here](https://github.com/servo/servo/actions/runs/33942192665). Testing: Safari and Servo no longer WebDriver out of bound, and checked in Firefox under 800x600. Updated expectations. Some new passing is due to servo#47043 earlier. Fixes: web-platform-tests/wpt#62481 --------- Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

…at Stylo does not support) (servo#47043) Motivated by servo#46983 to get this to the end. This has 44.1736% usage percentage as listed in Chrome report, and controls the most basic interaction rule with touch. Stylo PR: servo/stylo#439 Testing: Only new passing. No new failure. All of them are pointerevents tests so demonstrate quite the value. --------- Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

yezhizhen requested review from Loirooriol and mrobinson as code owners August 6, 2026 08:38

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Aug 6, 2026

yezhizhen mentioned this pull request Aug 6, 2026

Enable touch-action servo/stylo#439

Merged

yezhizhen commented Aug 6, 2026

View reviewed changes

yezhizhen force-pushed the touch branch from 22762cd to 3d4e305 Compare August 6, 2026 08:55

yezhizhen commented Aug 6, 2026

View reviewed changes

yezhizhen changed the title ~~paint: Implement touch-action (Except for pan-{up,down,left,right} that Stylo does not support)~~ css: Implement touch-action (Except for pan-{up,down,left,right} that Stylo does not support) Aug 6, 2026

yezhizhen force-pushed the touch branch from e207c30 to bf1ff19 Compare August 6, 2026 09:20

yezhizhen added the T-linux-wpt Do a try run of the WPT label Aug 9, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Aug 9, 2026

yezhizhen force-pushed the touch branch from 1dc88e9 to 519088b Compare August 10, 2026 10:25

yezhizhen requested a review from Narfinger August 11, 2026 02:55

Narfinger requested changes Aug 11, 2026

View reviewed changes

Comment thread components/paint/touch.rs

Comment thread components/paint/touch.rs

servo-highfive added S-needs-code-changes Changes have not yet been made that were requested by a reviewer. and removed S-awaiting-review There is new code that needs to be reviewed. labels Aug 11, 2026

yezhizhen marked this pull request as draft August 11, 2026 10:24

yezhizhen marked this pull request as ready for review August 11, 2026 10:41

servo-highfive added S-awaiting-review There is new code that needs to be reviewed. and removed S-needs-code-changes Changes have not yet been made that were requested by a reviewer. labels Aug 11, 2026

Narfinger approved these changes Aug 11, 2026

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servo-highfive removed the S-awaiting-review There is new code that needs to be reviewed. label Aug 11, 2026

mrobinson approved these changes Aug 24, 2026

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Comment thread components/paint/touch.rs Outdated

Comment thread components/shared/paint/display_list.rs Outdated

Comment thread components/shared/paint/display_list.rs Outdated

servo-highfive added the S-needs-rebase There are merge conflict errors. label Aug 24, 2026

yezhizhen force-pushed the touch branch from 22794f5 to c9b7846 Compare August 24, 2026 12:54

servo-highfive removed the S-needs-rebase There are merge conflict errors. label Aug 24, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Aug 24, 2026

yezhizhen requested a review from mrobinson August 27, 2026 05:28

yezhizhen added 10 commits August 27, 2026 19:00

update property listing

c635214

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

Support touch-action

f8c9930

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

Don't let touch-action affect mouse/wheel

92182f1

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

update WPT

04bcee3

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

minor lint nit

605d4af

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

Add fn pan_delta

f6d3a56

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

comment

bf191de

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

make it a member!

c3aefd1

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

nit

d106dc8

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

latest stylo

666e947

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

yezhizhen force-pushed the touch branch from 1821339 to 666e947 Compare August 27, 2026 11:17

yezhizhen enabled auto-merge August 27, 2026 11:17

yezhizhen added this pull request to the merge queue Aug 27, 2026

servo-highfive added the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Aug 27, 2026

Merged via the queue into servo:main with commit 435dda2 Aug 27, 2026
33 checks passed

yezhizhen deleted the touch branch August 27, 2026 12:21

servo-highfive removed the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Aug 27, 2026

pull Bot pushed a commit to PupilTong/stylo that referenced this pull request Aug 27, 2026

Enable touch-action (servo#439)

b3e6425

Servo PR: servo/servo#47043 Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>

yezhizhen mentioned this pull request Sep 8, 2026

wpt: Make more touch-action pointerevents tests work under 800x600 #47890

Merged

servo-wpt-sync mentioned this pull request Sep 8, 2026

wpt: Make more touch-action pointerevents tests work under 800x600 web-platform-tests/wpt#62513

Merged

	const promise_test_params = [
	["auto", ["right", "down"], true, true ],
	["auto", ["down", "right"], true, true ],
	["pan-x", ["right", "down"], true, false],
	["pan-x", ["down", "right"], false, false],
	["pan-y", ["right", "down"], false, false],
	["pan-y", ["down", "right"], false, true ],
	["none" , ["right", "down"], false, false],
	["none" , ["down", "right"], false, false],

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