What is an internal slot of an object in JavaScript?

The Web Component Slot element - HTML - MDN Web Docs define slot See here, the meanings of the word slot, as video and text slot (noun bingo slot online An expansion slot is a socket on a computer motherboard that allows you to add additional components to your system These slots are used to expand the

8 slot 500 series rack A slot is a narrow opening in a machine or container, for example a hole that you put coins in to make a machine work