SerialPort: connect event

More specifically, the connect event fires when the port becomes logically connected to the device after a user grants permission for a site to access the port following a Serial.requestPort() call:

• In the case of a wired serial port, this occurs when the port is physically connected to the device, for example via USB.
• In the case of a wireless serial port (for example, Bluetooth RFCOMM), this occurs when the port makes one or more active connections to the device (for example via Bluetooth L2CAP channels).

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

For more information, see Event bubbling.

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

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

onconnect = (event) => {};

A generic Event.

The Serial.requestPort() method returns a Promise that resolves with a SerialPort chosen by the user.

// Prompt user to choose a serial port
const port = await navigator.serial.requestPort();

port.addEventListener("connect", (event) => {
  // notify that the chosen port is connected
});

The connect event bubbles up to the Serial object where you can listen for any newly-connected ports.

navigator.serial.addEventListener("connect", (event) => {
  // notify that a new port is available
  // use `event.target` to refer to the newly-added port
});

• disconnect event