在深度嵌套的对象结构中获取父、祖父母和键

function findKeyInNestedObject(obj, targetKey) {
  if (obj.hasOwnProperty(targetKey)) {
    return { object: obj, key: targetKey };
  }

  for (var key in obj) {
    if (typeof obj[key] === 'object' && obj[key] !== null) {
      var result = findKeyInNestedObject(obj[key], targetKey);
      if (result) {
        return result;
      }
    }
  }

  return null;
}

var nestedObject = {
  a: {
    b: {
      c: {
        d: 'value'
      }
    }
  }
};

var result = findKeyInNestedObject(nestedObject, 'd');
console.log(result); // 输出: { object: { d: 'value' }, key: 'd' }