shadcn-ui/apps/v4/examples/radix/popover-basic.tsx

import { Button } from "@/examples/radix/ui/button"
import {
  Popover,
  PopoverContent,
  PopoverDescription,
  PopoverHeader,
  PopoverTitle,
  PopoverTrigger,
} from "@/examples/radix/ui/popover"

export function PopoverBasic() {
  return (
    <Popover>
      <PopoverTrigger asChild>
        <Button variant="outline">Open Popover</Button>
      </PopoverTrigger>
      <PopoverContent align="start">
        <PopoverHeader>
          <PopoverTitle>Dimensions</PopoverTitle>
          <PopoverDescription>
            Set the dimensions for the layer.
          </PopoverDescription>
        </PopoverHeader>
      </PopoverContent>
    </Popover>
  )
}