比较两个对象并获取通用值JavaScript

function compareObjects(obj1, obj2) {
  if (typeof obj1 !== typeof obj2) {
    return undefined;
  }

  const result = {};

  Object.keys(obj1).forEach(key => {
    if (obj2.hasOwnProperty(key) && obj1[key] === obj2[key]) {
      result[key] = obj1[key];
    }
  });

  return result;
}

// 示例用法
const obj1 = { name: 'John', age: 30, city: 'New York' };
const obj2 = { name: 'John', age: 25, country: 'USA' };

const commonValues = compareObjects(obj1, obj2);
console.log(commonValues);