Template, slot, and shadow

mdn slot element .slot = aString. A DOMString. The definition of 'slot' in that specification. The slot property of the Element interface returns the name of the shadow DOM slot attached to the element. A. 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.

mdnsport, The slot> HTML element—part of the Web Components technology suite—is a placeholder inside a web component that you can fill with your.