JavaScript에서 JSON 개체 배열을 통해 어떻게 반복합니까?

[
  {
    "id": "10",
    "class": "child-of-9"
  },
  {
    "id": "11",
    "class": "child-of-10"
  }
]

for (var i = 0; i < arr.length; i++) {
  // First, access the current object
  var obj = arr[i];

  // Now, we can iterate over the object's properties
  for (var key in obj) {
    // Obtain the value for the current property
    var value = obj[key];

    // Output the key and value
    document.write(`<br><br> - ${key}: ${value}`);
  }
}