HTML5 Please is a compatibility chart of HTML5/CSS3 features to find out “in which browsers they are supported (or not)”.
There is smart search bar, it is possible to filter the results with browser or device support, type (HTML5 or CSS3 elements/properties) and more.
Every item is described shortly and an opinion on whether they should be used with fallbacks or polyfills (with links to them) are shared.
The site is simply a must-bookmark for anyone designing with the new web technologies and need a guide for quickly checking the support for each property/element.
via webresourcesdepot.com