js sort 双重排序

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本文介绍了一种使用JavaScript对数组中对象的level字段和date字段进行排序的方法。首先按level字段排序，若level相同，则按date字段排序。代码示例展示了如何实现这一功能。

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js 对level字段和date字段进行排序

先按照level排序，如果level相等再按照date排序

代码如下，亲测能用.

var datas = [
    {"title":"asd","level":2,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":3,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":4,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":5,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":3,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":4,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":4,"content":"asd","date":"12/14/2018, 8:09:44 PM"},
    {"title":"asd","level":4,"content":"asdasf","date":"12/14/2018, 8:09:44 PM"},
    {"title":"fsdfg","level":5,"content":"rsgdv","date":"12/14/2018, 8:10:48 PM"}
]

datas .sort((a, b) => {
          if (b.level !== a.level) {
            return b.level - a.level;
          } else {
            return new Date(b.date) - new Date(a.date);
          }
        });