USB: disconnect event

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Syntax

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

addEventListener('disconnect', event => { })

ondisconnect = event => { }

Event type

Event properties

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.

Examples

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.
};

Specifications

Specification
WebUSB API
# disconnect
WebUSB API
# ref-for-dom-usb-ondisconnect

Browser compatibility

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