I don't follow why you are so opposed to the visibility api. I agree that it's annoying if used to ensure that I watch a certain video, but besides from that it doesn't seem malicious to me.
>they nevertheless log a bunch of stuff that get sent to the instructor
..what sort of stuff? And how is it related to the visibility api?
> I don't follow why you are so opposed to the visibility api.
It's in the second sentence.
The ability for a website to see when you click on things outside of the page itself (either by changing active window or tab) is quite unexpected from an end-user perspective
> what sort of stuff? And how is it related to the visibility api?
It's in the linked article. At least a few of those events are implemented with the visibility api.
>they nevertheless log a bunch of stuff that get sent to the instructor
..what sort of stuff? And how is it related to the visibility api?