1. CSS3 Cursors (original values)

    CSS3 cursor values added in the 2004 spec, including none, context-menu, cell, vertical-text, alias, copy, no-drop, not-allowed, nesw-resize, nwse-resize, col-resize, row-resize and all-scroll.

  2. Customizable Select element

    Customization of the `<select>` element's appearance. Previously envisioned as a separate element (`<selectlist>` or `<selectmenu>`).

  3. Context menu item (menuitem element)

    Method of defining a context menu item, now deprecated and [removed from the HTML specification](https://github.com/whatwg/html/issues/2730).

  4. element api: `contextmenu` event

  5. element api: `contextmenu` event: is a `pointerevent`

  6. htmlmenuelement api

  7. htmlmenuelement api: compact

  8. window api: menubar

  9. css property: appearance: menulist

  10. css property: appearance: menulist-button

  11. css property: cursor: context-menu

  12. css property: font: menu

  13. html element: menu

  14. html attribute: focusgroup: `menu` behavior

  15. html attribute: focusgroup: `menubar` behavior

  16. global_attributes: focusgroup: `menu` behavior

  17. global_attributes: focusgroup: `menubar` behavior