1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 29x 2x 27x 26x 1x | // @flow import rgb from './rgb' import type { RgbaColor } from '../types/color' /** * Returns a string value for the color. The returned result is the smallest possible rgba or hex notation. * * @example * // Styles as object usage * const styles = { * background: rgba(255, 205, 100, 0.7), * background: rgba({ red: 255, green: 205, blue: 100, alpha: 0.7 }), * background: rgba(255, 205, 100, 1), * } * * // styled-components usage * const div = styled.div` * background: ${rgba(255, 205, 100, 0.7)}; * background: ${rgba({ red: 255, green: 205, blue: 100, alpha: 0.7 })}; * background: ${rgba(255, 205, 100, 1)}; * ` * * // CSS in JS Output * * element { * background: "rgba(255,205,100,0.7)"; * background: "rgba(255,205,100,0.7)"; * background: "#ffcd64"; * } */ function rgba(value: RgbaColor | number, green?: number, blue?: number, alpha?: number): string { if (typeof value === 'number' && typeof green === 'number' && typeof blue === 'number' && typeof alpha === 'number') { return alpha >= 1 ? rgb(value, green, blue) : `rgba(${value},${green},${blue},${alpha})` } else if (typeof value === 'object' && green === undefined && blue === undefined && alpha === undefined) { return value.alpha >= 1 ? rgb(value.red, value.green, value.blue) : `rgba(${value.red},${value.green},${value.blue},${value.alpha})` } throw new Error('Passed invalid arguments to rgba, please pass multiple numbers e.g. rgb(255, 205, 100, 0.75) or an object e.g. rgb({ red: 255, green: 205, blue: 100, alpha: 0.75 }).') } export default rgba |