检查JavaScript 2D数组是否按升序排列？

function is2DArraySorted(arr) {
  for (let i = 0; i < arr.length; i++) {
    if (!arr[i].every((el, index) => index === 0 || el >= arr[i][index - 1])) {
      return false;
    }
  }
  return true;
}

// 示例用法
const array1 = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
console.log(is2DArraySorted(array1)); // 输出: true

const array2 = [[1, 2, 3], [4, 2, 6], [7, 8, 9]];
console.log(is2DArraySorted(array2)); // 输出: false