Ask HN: How does Google take client-side screenshots?
On most of Google pages they allow to give feedback that also takes a screenshot of your active screen to help the feedback, but how do they take a screenshot without using UserMedia.
https://cloud.google.com/compute/docs/
You have to give 3 stars or less to get a prompt to give feedback and then you can click either and it takes a screenshot.
stackoverflow discussion: http://stackoverflow.com/questions/4912092/using-html5-canva...
slides from a member of the feedback team: https://www.elliottsprehn.com/preso/fluentconf/
relevant JS library: https://github.com/niklasvh/feedback.js