Imperative slot assignmentThe assign() method for <slot> elements assigns nodes to the slot, as an alternative to using the slot and name HTML attributes. The nodes must be children of a shadow host and the shadow root must be created with the slotAssignment set to "manual". Also known as manual slot assignment.web-componentsWeb componentswidely2023-03-272025-09-27https://html.spec.whatwg.org/multipage/scripting.html#dom-slot-assignhttps://developer.mozilla.org/docs/Web/API/HTMLSlotElement/assignapi.HTMLSlotElement.assignapi.ShadowRoot.slotAssignmenthttps://nowyoucanuse.com/features--slot-assign.html