检查两个对象是否具有相同的属性

function checkSameProperties(obj1, obj2) {
  var sameProperties = {};

  for (var prop in obj1) {
    if (obj1.hasOwnProperty(prop) && obj2.hasOwnProperty(prop)) {
      sameProperties[prop] = obj1[prop];
    }
  }

  return sameProperties;
}

// 示例对象
var obj1 = { name: 'John', age: 30, city: 'New York' };
var obj2 = { name: 'Jane', age: 25, country: 'USA' };

// 检查两个对象是否具有相同的属性
var result = checkSameProperties(obj1, obj2);

console.log(result); // 输出：{ name: 'John', age: 30 }