A full-featured cross-browser hybrid rich text editor for editing webpage content. The hybrid editor is integrated with a user interface (e.g., toolbar, menu bar), and provides the appropriate context-sensitive behavior when users interact with the user interface and the interface contents. The hybrid editor responds immediately to basic commands (e.g., cursor movements, inserts, selections, repeated key presses, etc.), and employs behaviors and effects that are more aligned with familiar editor experiences, such as in a word processor. The editor architecture leverages the strengths of both the current browser content editability and JavaScript, limits the browser-based content editing to the insertion pointer, paste, processes content as the content is entered or when cursor is moved around, and implements an abstraction layer that maps browser-specific functions independent of the browser to the underlying support of the hybrid editor.