USBDevice: usbVersionMajor property

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The usbVersionMajor read only property of the USBDevice interface is one of three properties that declare the USB protocol version supported by the device. The other two properties are USBDevice.usbVersionMinor and USBDevice.usbVersionSubminor.

Value

The last of three properties that declare the USB protocol version supported by the device.

Specifications

Specification
WebUSB API # ref-for-dom-usbdevice-usbversionmajor

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