\n {/* Has an extra div wrapper because otherwise, adding content after\n this progressbar is spaced weirdly. */}\n
\n {/* Progressbar is not positioned absolutely, so that it can establish\n intrinsic size for props.children's content. */}\n
\n\n {/* Children are positioned absolutely, and height adapts to the\n progressbar's intrinsic size. It appears below the progressbar,\n but negative margin moves it back up. */}\n {props.children ? (\n
\n {props.children}\n
\n ) : null}\n