Construct a new context menu.
The options for initializing the menu.
Add an item to the context menu.
The options for creating the item.
A disposable which will remove the item from the menu.
Open the context menu in response to a 'contextmenu' event.
The 'contextmenu' event of interest.
true if the menu was opened, or false if no items
matched the event and the menu was not opened.
This method will populate the context menu with items which match the propagation path of the event, then open the menu at the mouse position indicated by the event.
An object which implements a universal context menu.
Notes
The items shown in the context menu are determined by CSS selector matching against the DOM hierarchy at the site of the mouse click. This is similar in concept to how keyboard shortcuts are matched in the command registry.