goog.dom.BrowserFeature

Whether attributes 'name' and 'type' can be added to an element after it's created. False in Internet Explorer prior to version 9.

Whether we can use element.children to access an element's Element children. Available since Gecko 1.9.1, IE 9. (IE<9 also includes comment nodes in the collection.)

Opera, Safari 3, and Internet Explorer 9 all support innerText but they include text nodes in script and style tags. Not document-mode-dependent.

MSIE, Opera, and Safari>=4 support element.parentElement to access an element's parent if it is an Element.

Whether NoScope elements need a scoped element written before them in innerHTML. MSDN: http://msdn.microsoft.com/en-us/library/ms533897(VS.85).aspx#1

Whether the browser supports OffscreenCanvas 2D context.

Whether we know at compile time that the browser doesn't support OffscreenCanvas.

Whether we know at compile time that the browser supports all OffscreenCanvas contexts.