DOM improvements in Firefox 3

Firefox 3 offers a number of improvements to the Document Object Model (DOM), especially in regard to support for extensions to the DOM added by other browsers. This article provides a list of those improvements as well as links to more detailed documentation.

• The Internet Explorer clientTop and clientLeft DOM extensions are now supported.
• The window.fullScreen property is now always accurate no matter where it is read, even in content. Previously it would return false inaccurately (Firefox bug 127013).
• The getClientRects and getBoundingClientRect DOM extensions are now supported (see Firefox bug 174397).
• The Internet Explorer elementFromPoint DOM extension is now supported (Firefox bug 199692).
• The Internet Explorer oncut, oncopy, and onpaste DOM extensions are now supported (Firefox bug 280959).
• Added privileged-code-only getters for Node.nodePrincipal, Node.baseURIObject, and document.documentURIObject. Chrome code must not touch (get or set) these properties on an unwrapped content object (e.g., on a wrappedJSObject of an XPCNativeWrapper), see Firefox bug 324464 for details.
• The Web Applications 1.0 (HTML5) getElementsByClassName() DOM method is now supported.
• The Web Applications 1.0 (HTML5) window.postMessage DOM method is now supported. This method allows a limited, opt-in form of client-side communication between windows not necessarily on the same domain.
• The charCode value of the keypress event is changed to an ASCII character if the accelerator key is pressed. Otherwise the charCode is the unmodified character (excepting Shift state).