Can someone explain what the contextmenu attribute in HTML5 does?

Question

can someone explain what the the contextmenu attribute does and if it can be used with all the HTML elements and can someone point me to some online demos/examples?

Answer 1

The contextmenu attribute refers to the

element the user agent should render when a context menu is requested by the user (e.g. using the right mouse button or the Menu/Hyper key on modern keyboards.

You can find an example here.