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WPT

wpt / webusb / usbInterface.https.any.worker.html

Spec: WebUSB API ↗

Runs: Chrome 155.0.8041.0 (wpt@4fbf9ef4d, 2026-09-04) | Firefox 157.0a1 (wpt@4fbf9ef4d, 2026-09-04) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@4fbf9ef4d, 2026-09-04) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)

View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi

ChromeFirefoxSafariLadybirdServoBlitz
Total4/40/40/40/40/4NOT RUN
SubtestChromeFirefoxSafariLadybirdServoBlitz
Can construct a USBInterface.PASSFAILFAILFAILFAIL
Constructing a USBInterface with an invalid interface number throws a range error.PASSFAILFAILFAILFAIL
The alternate attribute of USBInterface returns the one with bAlternateSetting 0 if the interface has not been claimed.PASSFAILFAILFAILFAIL
The alternate attribute of USBInterface returns the active alternate interface.PASSFAILFAILFAILFAIL