アホUUIDジェネレーター

uuid.js

const uuid = () => {
    const random = (range = 16) => Math.floor(Math.random() * range);
    const hexadecimal = num => num.toString(16);
    const array = new Array(30).fill().map(() => hexadecimal(random()));
    const slice = (x,y) => array.slice(x,y).join('');
    const pack = (delimiter, ...content) => content.join(delimiter);
    return pack('-',
        slice(0,8),
        slice(8,12),
        '4' + slice(12,15),
        hexadecimal(random(3) + 8) + slice(15,18),
        slice(18,30));
}