问题
I'm making an online javascript based MCQ/write exam system for a project and I want to know is there a way in javascript, using the browser, to identify if there is any other screen connected, using HDMI? Because when doing an online test (with web cam record enabled) a student can easily cheat by letting someone else (who is not near the webcam) write the exam by mirroring the screen to another device and by using a wireless mouse and keyboard. Are there any ways to prevent this? Even a third party solution would be great. Any advise would be appreciated.
来源：https://stackoverflow.com/questions/63428562/javascript-identify-if-there-is-any-other-screen-connected-using-hdmi