Random Coffee Roaster

Explore the horizon of roasted coffee beans. No ads. No promotion. Simply RANDOM.

Without modulo bias 😉

randomBetween(0, 10);

function randomBetween(min, max) {
  const range = max - min + 1;
  const maxUint32 = 0xFFFFFFFF; // 2^32 - 1
  const limit = (
    Math.floor(
      (maxUint32 + 1) / range
    ) * range
  ) - 1;

  while (true) {
    const array = new Uint32Array(1);
    crypto.getRandomValues(array);
    const r = array[0];

    if (r <= limit) {
      return min + (r % range);
    }
  }
}