SerialPort: disconnect event

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The disconnect event of the SerialPort interface is fired when the port disconnects from the device.

Syntax

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

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

ondisconnect = (event) => { }

Event type

A generic Event.

Description

The disconnect event fires when a port that was previously logically connected to the device is no longer connected.

Bubbling

This event bubbles up to the Serial instance that returned this interface. The event.target property refers to the SerialPort object that bubbles up.

For more information, see Event bubbling.

Examples

undefined

Notify when a specific port disconnects

Here the event listener is installed on a specific SerialPort object.

port.addEventListener("disconnect", (event) => {
  // notify that the port has become unavailable
});

Listening for any ports that become unavailable

The disconnect event bubbles up to the Serial object where you can listen for any ports that become unavailable.

navigator.serial.addEventListener("disconnect", (event) => {
  // notify that a port has become unavailable
  // use `event.target` to refer to the unavailable port
});