The Web Component Slot element - HTML - MDN Web Docs

To assign a child to a specific slot, ensure that the child's slot attribute matches the slot's name attribute: return html`slot @slotchange=${this

Definition The slot> HTML element is used in conjunction with the Shadow DOM to define a placeholder within a web component where external content can be

html slot machine html slot=partial > head> body> slot name=partial>No content found slot> body> html> …whereby body> is acting as a Shadow

html slot HTML , HTML and HTML were all retired on 28 January 2021, in hgroup> , menu> , slot>