The serial read-only property of the Navigator interface returns a Serial object which represents the entry point into the Web Serial API.

When getting, the same instance of the Serial object will always be returned.

A Serial object.

The following example uses the getPorts() method to initialize a list of available ports.

navigator.serial.getPorts().then((ports) => {
  // Initialize the list of available ports with `ports` on page load.
});

• Read from and write to a serial port
• Getting started with the web serial API