js 将hex 转str

function hexToString(hex) {
  const bytes = new Uint8Array(hex.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
  return new TextDecoder().decode(bytes);
}

const hex = "48656c6c6f20576f726c64"; // "Hello World" in hex
const str = hexToString(hex);
console.log(str); // 输出: Hello World

function hexToString(hex) {
  let str = '';
  for (let i = 0; i < hex.length; i += 2) {
    str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
  }
  return str;
}

const hex = "48656c6c6f20576f726c64"; // "Hello World" in hex
const str = hexToString(hex);
console.log(str); // 输出: Hello World

function isValidHex(hex) {
  return /^[0-9a-fA-F]+$/.test(hex);
}

function hexToString(hex) {
  if (!isValidHex(hex)) {
    throw new Error("Invalid hex string");
  }
  let str = '';
  for (let i = 0; i < hex.length; i += 2) {
    str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
  }
  return str;
}

function hexToString(hex) {
  if (hex.length % 2 !== 0) {
    hex = '0' + hex;
  }
  let str = '';
  for (let i = 0; i < hex.length; i += 2) {
    str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
  }
  return str;
}