JavaScript生成随机数的各种方法大全

console.log(Math.random()); // 可能输出 0.2856397428015183
console.log(Math.random()); // 可能输出 0.9123847982374728

function getRandomFloat(min, max) {
  return Math.random() * (max - min) + min;
}

console.log(getRandomFloat(1, 10)); // 可能输出 4.7329384

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

console.log(getRandomInt(1, 10)); // 可能输出 7

function getSecureRandomInt(min, max) {
  const randomBuffer = new Uint32Array(1);
  window.crypto.getRandomValues(randomBuffer);
  return min + (randomBuffer[0] % (max - min + 1));
}

console.log(getSecureRandomInt(1, 100)); // 可能输出 42

const crypto = require('crypto');

function getRandomBytes(size) {
  return crypto.randomBytes(size).toString('hex');
}

console.log(getRandomBytes(4)); // 可能输出 'e9f32c7b'

function getSecureRandomInt(min, max) {
  const randomBuffer = crypto.randomBytes(4);
  const randomNumber = randomBuffer.readUInt32BE(0);
  return min + (randomNumber % (max - min + 1));
}

console.log(getSecureRandomInt(1, 100)); // 可能输出 78

npm install seedrandom
const seedrandom = require('seedrandom');

const rng = seedrandom('my-seed');
console.log(rng()); // 可能输出 0.928372347
console.log(rng()); // 可能输出 0.238472834

function getRandomBoolean() {
  return Math.random() >= 0.5;
}

console.log(getRandomBoolean()); // 可能输出 true 或 false

function getRandomColor() {
  return `#${Math.floor(Math.random() * 16777215).toString(16)}`;
}

console.log(getRandomColor()); // 可能输出 '#3e4f1b'

function getUUID() {
  return crypto.randomUUID();
}

console.log(getUUID()); // 可能输出 '3d7a3b44-5a10-4d72-bf58-c13f01b4a4a6'