Camelcase字符串转换为普通字符串

function camelCaseToNormalString(camelCaseString) {
  let normalString = "";

  for (let i = 0; i < camelCaseString.length; i++) {
    const currentChar = camelCaseString[i];

    if (currentChar === currentChar.toUpperCase()) {
      normalString += " ";
      normalString += currentChar.toLowerCase();
    } else {
      normalString += currentChar;
    }
  }

  return normalString;
}

const camelCaseString = "camelCaseString";
const normalString = camelCaseToNormalString(camelCaseString);
console.log(normalString);  // 输出："camel case string"