The disconnect event of the USB interface is fired whenever a paired device is disconnected.

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("disconnect", (event) => {});

ondisconnect = (event) => {};

A USBConnectionEvent. Inherits from Event.

In addition to the properties listed below, properties from the parent interface, Event, are available.

device Read only

The USBDevice the event is fired for.

Once a USB device is disconnected, you might want to update the UI.

navigator.usb.addEventListener("disconnect", (event) => {
  // Remove event.device from the UI.
});

Alternatively, you can use the USB.ondiscconnect event handler property to establish a handler for the disconnect event:

navigator.usb.ondisconnect = (event) => {
  // Remove event.device from the UI.
};