Detect authorized USB devices, request permission, open/close, and inspect configuration/interface details.
Idle
Devices
Authorized devices (this browser/profile)
WebUSB support
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Secure context
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Selected device
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VID:PID
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Serial
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Manufacturer
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Product
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Opened
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Some devices only expose generic USB classes (HID/storage/etc.) and will not appear or won’t be accessible.
Devices designed for WebUSB often provide a landing page URL in their descriptors (not always readable without vendor commands).
Log
Common gotchas:
Must be HTTPS or localhost.
Requesting a device requires a user click.
Opening/claiming interfaces can fail if a native driver is holding it.
