The Web Component Slot element - HTML - MDN Web Docs

A history of the HTML slot element element slot When you project content into a slot, it will be distributed to the corresponding slot> element within the shadow DOM of a custom element element slot Slot Content The slot element is used as the parent element of the part 1 subelement The part1 subelement is introduced to the parent element index to

elemento slot Elements aren't limited to a single slot If you want to provide multiple slots, you can do that through named slots