Pick a random property of an object

JavaScript version
const randomProp = (obj) => Object.keys(obj)[(Math.random() * Object.keys(obj).length) | 0];
TypeScript version
const randomProp = (obj: object): any => Object.keys(obj)[(Math.random() * Object.keys(obj).length) | 0];
Examples
const colors = {
aqua: '#00ffff',
azure: '#f0ffff',
beige: '#f5f5dc',
black: '#000000',
blue: '#0000ff',
brown: '#a52a2a',
cyan: '#00ffff',
darkblue: '#00008b',
darkcyan: '#008b8b',
darkgrey: '#a9a9a9',
darkgreen: '#006400',
darkkhaki: '#bdb76b',
darkmagenta: '#8b008b',
darkolivegreen: '#556b2f',
darkorange: '#ff8c00',
darkorchid: '#9932cc',
darkred: '#8b0000',
darksalmon: '#e9967a',
darkviolet: '#9400d3',
fuchsia: '#ff00ff',
gold: '#ffd700',
green: '#008000',
indigo: '#4b0082',
khaki: '#f0e68c',
lightblue: '#add8e6',
lightcyan: '#e0ffff',
lightgreen: '#90ee90',
lightgrey: '#d3d3d3',
lightpink: '#ffb6c1',
lightyellow: '#ffffe0',
lime: '#00ff00',
magenta: '#ff00ff',
maroon: '#800000',
navy: '#000080',
olive: '#808000',
orange: '#ffa500',
pink: '#ffc0cb',
purple: '#800080',
violet: '#800080',
red: '#ff0000',
silver: '#c0c0c0',
white: '#ffffff',
yellow: '#ffff00',
};
randomProp(colors); // 'red'