conformance · v151
v151 · window-drag — conformance probe
6 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.
0
pass
0
fail
0
blocked
6
total
| id | contract | kind | verdict | detail |
|---|---|---|---|---|
window-drag-drag-supported |
CSS.supports recognises the window-drag property with the 'drag' keyword. spec ↗ | css-supports | … | |
window-drag-no-drag-supported |
window-drag also accepts 'no-drag' for opting back out within a drag region. spec ↗ | css-supports | … | |
window-drag-rejects-garbage |
An unrelated keyword like 'maybe' must not be reported as supported. spec ↗ | script | … | |
window-drag-roundtrips-via-cssom |
Setting windowDrag via CSSOM and reading getComputedStyle returns 'drag' or 'no-drag'. spec ↗ | script | … | |
window-controls-overlay-companion-api |
navigator.windowControlsOverlay is the companion JS surface for installed PWAs that use window-drag regions. spec ↗ | script | … | |
legacy-app-region-still-parses |
The legacy -webkit-app-region: drag (the predecessor surface) should still parse so existing PWAs keep working during the migration window. spec ↗ | css-supports | … |