Cannot switch browser window till user is logged in using angular 2+ or jquery or ASP.NET

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I want to create online exam application, where in i want to develop functionality like while user is taking exam, user cannot switch to other window or browser tab.If he does then exam should commit automatically.
This i want to develop using Angular 2+ or Jquery Or asp.net.

can any one help me to develop or any link regarding this.

What I have tried:

I want to create online exam application, where in i want to develop functionality like while user is taking exam, user cannot switch to other window or browser tab.If he does then exam should commit automatically.
This i want to develop using Angular 2+ or Jquery Or asp.net.

can any one help me to develop or any link regarding this.

Posted 14-Jul-19 20:24pm

jayant812

Updated 14-Jul-19 21:19pm

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OriginalGriff · Answer 1 · 2019-07-14T21:20:00

Solution 1

You can't prevent it, not at all. Doesn't matter what language you use, the user can always switch away from your page - be it to another page, a different app, or even a different instance of the same browser.

Think about it: if you could do that, so could malicious websites. Do you really want a ransomware or similar site preventing you from switching away from it?

Posted 14-Jul-19 21:20pm

OriginalGriff

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jayant812 15-Jul-19 3:48am

Ok thats fine we can't prevent, but i need some thing if user switch window then user should automatically logged out from the exam.

OriginalGriff 15-Jul-19 3:57am

You are over to Javascript, and the Blur and Focus events, or something like the Visibility API:
https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API?redirectlocale=en-US&redirectslug=DOM%2FUsing_the_Page_Visibility_API

Do not expect this to be easy; do not expect the same code to work the same on all browsers ...