[gregable]

The share button simply calls the browser's share API, for example: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/s...

> The Navigator.share() method invokes the native sharing mechanism of the device as part of the Web Share API.

[username223]

I didn't know the Web Share API existed, but based on the RFC, it looks like yet another Google-driven "standard." I still don't see why it needs to be added to the page.