The Web Component Slot element - HTML - MDN Web Docs

mdn slot When the slot's containing component gets rendered, the slot is rendered with the custom element's child that has a matching slot attribute. A named slot is a slot> element. Learn about the Element.slot property, including its type, code examples, specifications, and browser compatibility.

mdnsport live chat, 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.