用原生js 把一个json对象从下划线转换成小驼峰形式

可以使用以下代码将一个json对象从下划线转换成小驼峰形式：

function toCamelCase(obj) {
  if (typeof obj !== 'object') {
    return obj;
  }
  if (Array.isArray(obj)) {
    return obj.map(toCamelCase);
  }
  const result = {};
  for (const key in obj) {
    if (obj.hasOwnProperty(key)) {
      const camelKey = key.replace(/_([a-z])/g, (match, p1) => p1.toUpperCase());
      result[camelKey] = toCamelCase(obj[key]);
    }
  }
  return result;
}

使用方法：

const underscoreObj = {
  first_name: 'John',
  last_name: 'Doe',
  address: {
    street_name: 'Main St',
    city_name: 'Anytown',
    state_code: 'CA'
  }
};

const camelObj = toCamelCase(underscoreObj);
console.log(camelObj);

输出结果：

{
  firstName: 'John',
  lastName: 'Doe',
  address: {
    streetName: 'Main St',
    cityName: 'Anytown',
    stateCode: 'CA'
  }
}