import Typography from 'typography' ; const typography = new Typography ( { baseFontSize : '18px' , baseLineHeight : 1.666 , headerFontFamily : [ 'Helvetica Neue' , 'Segoe UI' , 'Helvetica' , 'Arial' , 'sans-serif' ] , bodyFontFamily : [ 'Georgia' , 'serif' ] , } ) ; typography . injectStyles ( ) ;