键与同一对象中值的键相同的二维对象

{
  "key1": {
    "key1": "value1"
  },
  "key2": {
    "key2": "value2"
  }
}

const obj = {
  "key1": {
    "key1": "value1"
  },
  "key2": {
    "key2": "value2"
  }
};

function traverse(obj) {
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      console.log(`Key: ${key}`);
      traverse(obj[key]);
    }
  }
}

traverse(obj);

function checkDuplicateKeys(obj) {
  const keys = new Set();
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      if (keys.has(key)) {
        console.log(`Duplicate key found: ${key}`);
      } else {
        keys.add(key);
        checkDuplicateKeys(obj[key]);
      }
    }
  }
}

checkDuplicateKeys(obj);