slot>: The Web Component Slot element

mdn slot The slot property of the Element interface returns the name of the shadow DOM slot the element is inserted. We'll discuss using the template> and slot> elements, the slot attribute, and JavaScript to create a template with an encapsulated Shadow DOM. We'll then re-use

mdnsport, An element with a slot attribute is assned to the slot created by the slot> element whose name attribute's value matches that slot attribute's value..