The new API will enable custom buttons, ringtones, and higher priority notifications for incoming calls.

Developers can test the feature by using a sample app in Microsoft Edge on Windows.

The proposed extension, dubbed “Incoming Call Notifications,” aims to bridge this gap.

Additionally, the notifications will have a higher priority than others, when supported by the platform.

This allows developers to create a clear distinction between incoming calls and other types of notifications.

Microsoft has implemented a prototype of the explainer in Chromium and is seeking feedback from developers.

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