HTML5test: How well does your browser support HTML5?

HTML5test: How well does your browser support HTML5?
* https://github.com/WebPlatformTest/HTML5test
* https://html5test.com
* A mirror: https://html5test.opensuse.org
Original version is not maintained anymore, instead there is a fork:
* https://html5test.co
* https://github.com/niutech/html5test