SerialPort: disconnect
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The disconnect
event of the SerialPort
interface is fired when the port has disconnected from the device. This event is only fired for ports associated with removable devices such as those connected via USB.
This event bubbles to the instance of Serial
that returned this interface.
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
.
Bubbling
This event bubbles to Serial
. The event.target
property refers to the SerialPort
object that bubbles up.
For more information, see Event bubbling and capture.
Examples
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
});
Specifications
Specification |
---|
Web Serial API # dfn-disconnect |
Web Serial API # dom-serialport-ondisconnect |
Browser compatibility
BCD tables only load in the browser
See also
connect
event