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conformance · v138

v138 · viewport-segments-enumeration-api — conformance probe

5 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://www.w3.org/TR/mediaqueries-5/#mf-horizontal-viewport-segments chromestatus: #5170498990243840 generated 2026-06-01T09:53:00Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
5
total
id contract kind verdict detail
visualviewport-exists window.visualViewport exists — the surface viewport segments enumeration sits next to. spec ↗ exists
viewport-segments-property window.viewport.segments (or visualViewport.segments) is exposed as a list/array. spec ↗ script
horizontal-viewport-segments-mq-supported matchMedia('(horizontal-viewport-segments: 1)') is callable without throwing. spec ↗ script
vertical-viewport-segments-mq-supported matchMedia('(vertical-viewport-segments: 1)') is callable without throwing. spec ↗ script
env-viewport-segment-width-supported CSS env(viewport-segment-width 0 0) parses in width properties. spec ↗ css-supports