1*55058f92SEvan Baconimport { PixelRatio, Platform } from 'react-native'; 2*55058f92SEvan Bacon 3*55058f92SEvan Baconexport function rem(value: number): number | string { 4*55058f92SEvan Bacon if (Platform.OS === 'web') return `${value}rem`; 5*55058f92SEvan Bacon return PixelRatio.getFontScale() * 16 * value; 6*55058f92SEvan Bacon} 7*55058f92SEvan Bacon 8*55058f92SEvan Baconexport function em(value: number): number | string { 9*55058f92SEvan Bacon if (Platform.OS === 'web') return `${value}em`; 10*55058f92SEvan Bacon return rem(value); 11*55058f92SEvan Bacon} 12