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WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / visual-viewport

Spec: https://wicg.github.io/visual-viewport/ ↗

Runs: Chrome 158.0.8110.0 (wpt@4c84956f8, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@850b36a56, 2026-10-18) | Ladybird 1.0-75f48 (wpt@4c84956f8, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz 38ca4e777 (wpt@cd1d8aa5b, 2026-10-18)

Score history

Percentage of subtests passing over time, one master run per day. Every engine's percentage is relative to the same denominator: the total number of subtests known to any engine in the latest runs (so lines are not distorted by tests being added to WPT, and an engine that skips tests is not flattered for it).

1 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%Nov 2025Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Jun 2026Jul 2026Aug 2026Sep 2026Oct 2026ChromeFirefoxSafariLadybirdServo

Sort: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total94.2%33/3594.2%33/3594.2%33/3585.7%30/350.0%0/350.0%0/35
TestChromeFirefoxSafariLadybirdServoBlitz
Total94.2%33/3594.2%33/3594.2%33/3585.7%30/350.0%0/35NO DATA
page-and-offset-in-iframe.htmlFAILFAILFAILFAILFAILNOT RUN
resize-event-order.html2/22/22/20/20/2NOT RUN
scroll-event-order.htmlPASSFAILFAILFAILFAILNOT RUN
viewport-no-resize-event-on-overflow-recalc.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-read-size-causes-layout.htmlPASSPASSPASSPASSFAILNOT RUN
viewport-read-size-in-iframe-causes-layout.htmlPASSPASSPASSPASSFAILNOT RUN
viewport-resize-event-on-iframe-show.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-resize-event-on-iframe-size-change.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-resize-event-on-load-overflowing-page.htmlPASSPASSPASSPASSTIMEOUTNOT RUN
viewport-scale-clamped.htmlFAILPASSPASSFAILFAILNOT RUN
viewport-scrollbars-cause-resize-in-iframe.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-scrollbars-cause-resize.html3/33/33/33/30/3NOT RUN
viewport-type.html2/22/22/22/20/2NOT RUN
viewport-unscaled-scale-iframe.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-unscaled-scale.htmlPASSPASSPASSPASSERRORNOT RUN
viewport-unscaled-scroll-iframe.html4/44/44/44/40/4NOT RUN
viewport-unscaled-scroll.html4/44/44/44/40/4NOT RUN
viewport-unscaled-size-iframe.html4/44/44/44/40/4NOT RUN
viewport-unscaled-size.html4/44/44/44/40/4NOT RUN