dialog element shipped in Chrome 37 Beta
Chrome Beta has landed its native support for
<dialog> element without needing "Enable experimental Web Platform features." flag turned on.
Check out more sample codes and how it works in detail with a live demo.
There are a few changes applied to the implementation since the last announcement but notable one is:
<dialog>is no longer vertically centered in the viewport. It has no special positioning behavior beyond its default CSS styling.