fix docs for using custom components compositionally (#2044)

Garklein

2025-07-08 82c53a1c80069734da273883885d764ada0c1dd2

 quartz/components/Header.tsx

@@ -1,6 +1,6 @@
import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"

function Header({ children }: QuartzComponentProps) {
const Header: QuartzComponent = ({ children }: QuartzComponentProps) => {
  return children.length > 0 ? <header>{children}</header> : null
}