Introduction

As devices with advanced pen input capabilities are becoming increasingly prevalent, it is important that the web platform continues to evolve to fully support these advanced features in order to unlock rich experiences for both end users and developers. One such advancement is the ability for a device's digitizer to recognize more than one pen device interacting with it simultaneously. In this Explainer, we propose an extension to the PointerEvent interface to include a new attribute, deviceId, that represents a session-persistent, document isolated, unique identifier that a developer can reliably use to identify individual pens interacting with the page.

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Explainer "Extending the PointerEvent with Unique DeviceId Attribute"