/Web APIs

USB: disconnect event

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

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) => {};

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.


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.


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
disconnect_event 61 79 No No 48 No No 61 No 45 No 8.0

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