HTML slot — Type Overflow Developer Docs

The slot> element is a slot outlet that indicates where the parent-provided slot content should be rendered slot diagram And the final rendered DOM: html

Since LitElement uses the lit-html html tag function to define templates you return html`slot @slotchange=${}>slot>

html slot HTML textarea ref To create a floating label textarea, a custom component is required to replace the default textarea

html slot tag with the tag name our-custom-element twice A first custom element that defines the slot to be a span element