How to pause a video when user click on new tab/program

Dear Community,

I hope somebody will help me to find a solution  (Captivate 9).

I need to automatically pause a project if the user opens a new browser window/program and to resume the project if the user comes back to the course.

I guess I need some JS with a blur and focus functions but all the test I'm doing don't work 😞

If somebody know how to do it, I really appreciate your help!