rand.js

const RAND_MAX = 0xffff; // 65535

const next = new Uint32Array([0]);

export function srand(seed) {
  next[0] = seed;
}

export function rand() {
  next[0] = next[0] * 1103515245 + 12345;
  return ((next[0] % ((RAND_MAX + 1) <<8)) >>8);
}