HTML5 Please API

HTML5 Please
HTML5 Please is a web resource for developers built around a collection of recommendations describing browser support and suggested usage for modern browser features such as HTML5 and CSS3. The HTML5 API pulls data from caniuse.com and matches it to a user’s UA. Depending on the match, the API either tells the user that their browser is missing critical features required for the page, or simply allows the page to render normally.