迭代对象数组以返回具有最大值sum的键

function findMaxSumKey(objArray) {
  let maxSum = 0;
  let maxKey = null;

  for (let key in objArray) {
    let sum = calculateSum(objArray[key]); // 根据具体需求计算sum值

    if (sum > maxSum) {
      maxSum = sum;
      maxKey = key;
    }
  }

  return maxKey;
}

// 示例的对象数组
const objArray = [
  { key1: 10, key2: 20, key3: 30 },
  { key1: 5, key2: 15, key3: 25 },
  { key1: 8, key2: 12, key3: 20 }
];

const maxSumKey = findMaxSumKey(objArray);
console.log("具有最大sum值的键为：" + maxSumKey);