let obj = {
        id: 1,
        name: "翠花",
        sex: 18,
        hobby: null,
        age: null,
      };
      // 使用Object.entries()获取对象的键值对数组
      let entries = Object.entries(obj);

      // 使用filter()筛选出值不为null的键值对
      let filteredEntries = entries.filter(([key, value]) => value !== null);

      // 使用reduce()将筛选后的键值对转换回对象
      let filteredObj = filteredEntries.reduce((result, [key, value]) => {
        result[key] = value;
        return result;
      }, {});
      console.log(filteredObj);

结果

{
    "id": 1,
    "name": "翠花",
    "sex": 18
}