import * as React from 'react' ; interface RectangleProps { height ? : number ; } const Rectangle = ( { height = 8 } ) => { return ( < div style = { { backgroundColor : 'rgba(0, 0, 0, .3)' , borderRadius : '0.25rem' , height : `${ height }px` , width : '100%' , } } />); } ; export default Rectangle ;