HTMLElement.contextMenu - Web APIs
the htmlelement.contextmenu property refers to the context menu assigned to an element using the contextmenu attribute.
... syntax var elementcontextmenu = element.contextmenu; example var contextmenu = document.getelementbyid("element").contextmenu; // change the label of the first menu entry contextmenu.firstelementchild.label = "new label"; ...

HTMLElement - Web APIs
htmlelement.contextmenu is a htmlmenuelement representing the contextual menu associated with the element.

Index - Web APIs
1620 htmlelement.contextmenu api, deprecated, element, html, html dom, property, reference, ux no summary!

Movement, orientation, and motion: A WebXR example - Web APIs
next, we add event handlers for the mousemove and element.contextmenu_event, but only if the allowmouserotation constant is true.