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How does a website know my laptop is connected to an external monitor?


How to detect if JavaScript is disabled?How does JavaScript .prototype work?How can I know which radio button is selected via jQuery?How to detect pressing Enter on keyboard using jQuery?How does the “this” keyword work?Detecting arrow key presses in JavaScriptDetect if device is iOSUsing Chrome's Element Inspector in Print Preview Mode?How does data binding work in AngularJS?How does Facebook disable the browser's integrated Developer Tools?













2















I was on a video streaming website, and it notified me that I am not allowed to view the video because it detects that my browser is connected to an external monitor.
How does the browser detect this?










share|improve this question
























  • What is the site?

    – Barmar
    Mar 21 at 4:47











  • www.kanopy.com/

    – S. Gross
    Mar 21 at 4:55











  • I don't have a library card I can use with that site :)

    – Barmar
    Mar 21 at 5:21











  • Got it, thanks for reaching out!

    – S. Gross
    Mar 21 at 14:31















2















I was on a video streaming website, and it notified me that I am not allowed to view the video because it detects that my browser is connected to an external monitor.
How does the browser detect this?










share|improve this question
























  • What is the site?

    – Barmar
    Mar 21 at 4:47











  • www.kanopy.com/

    – S. Gross
    Mar 21 at 4:55











  • I don't have a library card I can use with that site :)

    – Barmar
    Mar 21 at 5:21











  • Got it, thanks for reaching out!

    – S. Gross
    Mar 21 at 14:31













2












2








2








I was on a video streaming website, and it notified me that I am not allowed to view the video because it detects that my browser is connected to an external monitor.
How does the browser detect this?










share|improve this question
















I was on a video streaming website, and it notified me that I am not allowed to view the video because it detects that my browser is connected to an external monitor.
How does the browser detect this?







javascript google-chrome video-streaming hardware hdcp






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 21 at 14:40









Josh Lee

120k26217245




120k26217245










asked Mar 21 at 4:24









S. GrossS. Gross

1613




1613












  • What is the site?

    – Barmar
    Mar 21 at 4:47











  • www.kanopy.com/

    – S. Gross
    Mar 21 at 4:55











  • I don't have a library card I can use with that site :)

    – Barmar
    Mar 21 at 5:21











  • Got it, thanks for reaching out!

    – S. Gross
    Mar 21 at 14:31

















  • What is the site?

    – Barmar
    Mar 21 at 4:47











  • www.kanopy.com/

    – S. Gross
    Mar 21 at 4:55











  • I don't have a library card I can use with that site :)

    – Barmar
    Mar 21 at 5:21











  • Got it, thanks for reaching out!

    – S. Gross
    Mar 21 at 14:31
















What is the site?

– Barmar
Mar 21 at 4:47





What is the site?

– Barmar
Mar 21 at 4:47













www.kanopy.com/

– S. Gross
Mar 21 at 4:55





www.kanopy.com/

– S. Gross
Mar 21 at 4:55













I don't have a library card I can use with that site :)

– Barmar
Mar 21 at 5:21





I don't have a library card I can use with that site :)

– Barmar
Mar 21 at 5:21













Got it, thanks for reaching out!

– S. Gross
Mar 21 at 14:31





Got it, thanks for reaching out!

– S. Gross
Mar 21 at 14:31












1 Answer
1






active

oldest

votes


















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Its part of the DRM system. Your browser ships with a Content decryption module (CDM) to securely play back DRM content.






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    1 Answer
    1






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    active

    oldest

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    active

    oldest

    votes









    1














    Its part of the DRM system. Your browser ships with a Content decryption module (CDM) to securely play back DRM content.






    share|improve this answer



























      1














      Its part of the DRM system. Your browser ships with a Content decryption module (CDM) to securely play back DRM content.






      share|improve this answer

























        1












        1








        1







        Its part of the DRM system. Your browser ships with a Content decryption module (CDM) to securely play back DRM content.






        share|improve this answer













        Its part of the DRM system. Your browser ships with a Content decryption module (CDM) to securely play back DRM content.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 21 at 16:12









        szatmaryszatmary

        18.7k63043




        18.7k63043





























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