区间随机数

 randomNumber(min, max) {
      const randomBuffer = new Uint32Array(1);
      let crypto = window.crypto || window.webkitCrypto || window.mozCrypto || window.oCrypto || window.msCrypto
      crypto.getRandomValues(randomBuffer);
      const number = randomBuffer[0] / (0xffffffff + 1);
      return Math.floor(number * (max - min) + min);
    }