Can't make dom-examples/screen-wake-lock-api work

[Alex Ivanov]

Hi!
Thanks for providing this example.
https://github.com/mdn/dom-examples/tree/master/screen-wake-lock-api

Expected Behavior

Button 'turn wake lock on' is active.
Text in the box 'wake lock status' is 'Screen Wake Lock API supported 🎉'

Current Behavior

Button 'turn wake lock on' is inactive.
Text in the box 'wake lock status' is 'Wake lock is not supported by this browser.'

Possible Solution

Unknown to me

Steps to Reproduce

1. Debian 9 server
2. nginx/1.10.3
3. add three files from repo to /var/www/html
4. set up Nginx to serve index.html
5. Chrome Version 91.0.4472.114 (Official Build) (x86_64)
6. No https (might it be an issue?)

No errors shown, just button is inactive.
How can I make it work as it's working in your demo (https://mdn.github.io/dom-examples/screen-wake-lock-api/)?

[Thomas Steiner]

Bullet 6. is the problem indeed. The HTTPS requirement is mentioned in the article and the MDN docs. I just tried the demo on Chrome 91 and it worked.

[Alex Ivanov]

Thanks, Thomas, that's my bad, I've missed this in the article.