@boem312/minecraft-server/src/functions/uuid.js

A pure JS library to create Minecraft Java 1.16.3 servers

let lut = [];
for (let i = 0; i < 256; i++)
    lut[i] = (i < 16 ? '0' : '') + (i).toString(16);

function uuid() {
    const d0 = Math.random() * 0xffffffff | 0;
    const d1 = Math.random() * 0xffffffff | 0;
    const d2 = Math.random() * 0xffffffff | 0;
    const d3 = Math.random() * 0xffffffff | 0;

    return lut[d0 & 0xff] + lut[d0 >> 8 & 0xff] + lut[d0 >> 16 & 0xff] + lut[d0 >> 24 & 0xff] + '-' +
        lut[d1 & 0xff] + lut[d1 >> 8 & 0xff] + '-' + lut[d1 >> 16 & 0x0f | 0x40] + lut[d1 >> 24 & 0xff] + '-' +
        lut[d2 & 0x3f | 0x80] + lut[d2 >> 8 & 0xff] + '-' + lut[d2 >> 16 & 0xff] + lut[d2 >> 24 & 0xff] +
        lut[d3 & 0xff] + lut[d3 >> 8 & 0xff] + lut[d3 >> 16 & 0xff] + lut[d3 >> 24 & 0xff];
}

module.exports = { uuid };