Golden ratio with a number.
$ npm install --save golden-ratio
const goldenRatio = require('golden-ratio');
goldenRatio({x:1}); //=> { y: 1.618, x: 1 }
goldenRatio({y:1}); //=> { x: 0.6180469715698392, y: 1 }
goldenRatio({x:'meow'}); //=> 'Error: Missing expected input'
MIT © Hemanth.HM