Element: slot property - Web APIs | MDN - -m.univ-mlv.fr

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. 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

mdnslot login, The slot property of the Element interface returns the name of the shadow DOM slot the element is inserted.