Widget index / Host integrations · Download this HTML
A bold word, an italic word, and ordinary text.
Edit or paste here using the browser’s editing behavior.
Ready — try the example.
States and behavior
Editable rich content, selection, multiline input, browser clipboard and undo.
Keyboard
Native contenteditable editing keys apply. Tab leaves the editor; the example registers no formatting shortcuts.
Scope and adaptation
This is a browser adapter with basic editing only, not a reusable RichEdit/RTF engine. Production formatting, reliable undo, safe paste/import and serialization need a dedicated editor or native RichEdit. Never insert untrusted HTML directly.
Sources
Microsoft preliminary guide (1995), chapters 7–8
Original implementation; system colors are represented by CSS variables. The default 13 px system-font stack is a readable browser adaptation. The 1995 source is preliminary, not a final product specification. Test the target browser and native host before shipping.