A container component for the card's header section. Displays header content including an optional thumbnail, title, subtitle, and additional content.
Slots
thumbnail — Renders header media such as an icon or small image.
title — Renders the card title (typically a heading element).
subtitle — Renders the card subtitle (typically a smaller heading or text).
default — Renders additional content displayed next to the title area.
CSS Parts
header — The card header text container.
title — The title slot wrapper.
subtitle — The subtitle slot wrapper.