检索数组中的数据

let arr = [
  {
    title: "总部",
    type: "site",
    sites: [
      {
        id: 204,
        name: "海南"
      },
      {
        id: 371,
        name: "南京"
      }
    ]
  },
  {
    title: "研发部",
    type: "site",
    sites: [
      {
        id: 266,
        name: "北京"
      },
      {
        id: 332,
        name: "上海"
      }
    ]
  }
];

function filter(list, keyword) {
  return list.map(item => {
    item.sites = item.sites.filter(site => {
      return site.name.includes(keyword);
    });
    return item;
  });
}

console.log(filter(arr, "海"));