如何在react native中将String转换为Byte数组？

// 导入React Native的内置模块
import { Platform } from 'react-native';

// 定义一个函数将字符串转换为字节数组
function stringToBytes(str) {
  let bytes = [];
  for (let i = 0; i < str.length; i++) {
    let charCode = str.charCodeAt(i);
    if (charCode < 0x80) {
      bytes.push(charCode);
    } else if (charCode < 0x800) {
      bytes.push(0xc0 | (charCode >> 6));
      bytes.push(0x80 | (charCode & 0x3f));
    } else if (charCode < 0xd800 || charCode >= 0xe000) {
      bytes.push(0xe0 | (charCode >> 12));
      bytes.push(0x80 | ((charCode >> 6) & 0x3f));
      bytes.push(0x80 | (charCode & 0x3f));
    } else {
      i++;
      charCode = 0x10000 + (((charCode & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff));
      bytes.push(0xf0 | (charCode >> 18));
      bytes.push(0x80 | ((charCode >> 12) & 0x3f));
      bytes.push(0x80 | ((charCode >> 6) & 0x3f));
      bytes.push(0x80 | (charCode & 0x3f));
    }
  }
  return bytes;
}

// 调用函数将字符串转换为字节数组
const str = "Hello, World!";
const bytes = stringToBytes(str);
console.log(bytes);