USBDevice.configuration
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
 The configuration read only property of the USBDevice interface returns a USBConfiguration object for the currently selected interface for a paired USB device. 
Syntax
var USBConfiguration = USBDevice.configuration
Value
A USBConfiguration object.
Example
The following example uses this property to test for the existence of a USBConfiguration property to select a configuration before claiming an interface.
async function connectDevice(usbDevice) {
  await usbDevice.open();
  if (usbDevice.configuration === null)
    await usbDevice.selectConfiguration(1);
  await usbDevice.claimInterface(0);
}
Specifications
| Specification | 
|---|
| WebUSB API # ref-for-dom-usbdevice-configuration① | 
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
| configuration | 61 | 79 | No | No | 48 | No | No | 61 | No | 45 | No | 8.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/USBDevice/configuration