JS API for querying user activation

[sideshowbarker]

https://github.com/dtapuska/useractivation

Currently there are ways to determine if a user gesture is active:

• Copy and Pasting items to the clipboard
• Requesting play on a media element and checking its status

Some of these actions are destructive to the user (ie. replacing the clipboard text) and while we cannot necessarily prevent them, it is advisable to provide functionality to the platform to discourage their use.

A few examples of use are:

• Video autoplay
• Audio play

Cc @dtapuska

[sideshowbarker]

So the right place for this to be defined is in the HTML spec, and there’s an existing pull request for it at whatwg/html#4009. So I think it’s not necessary for us to track it here too