筛选不带数据的json子级

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "friends": [
    {
      "name": "Alice",
      "age": 28
    },
    {
      "name": "Bob",
      "age": 32
    },
    {}
  ]
}

function filterEmptyJSON(json) {
  if (typeof json === 'object') {
    if (Array.isArray(json)) {
      if (json.length === 0) {
        return json;
      } else {
        return json.filter(item => Object.keys(item).length > 0);
      }
    } else {
      const filtered = {};
      for (const key in json) {
        if (Object.keys(json[key]).length > 0) {
          filtered[key] = json[key];
        }
      }
      return filtered;
    }
  } else {
    return json;
  }
}

const jsonData = {
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  },
  "friends": [
    {
      "name": "Alice",
      "age": 28
    },
    {
      "name": "Bob",
      "age": 32
    },
    {}
  ]
};

const filteredData = filterEmptyJSON(jsonData);
console.log(filteredData);