javascript - 查找日期在范围内，时刻失败

Question

我有这个对象数组

[
  {
    "date_from": "2017-04-29 00:00:00",
    "date_to": "2017-05-02 23:59:59",
    "username":"john"
  },
  {
    "date_from": "2017-04-04 00:00:00",
    "date_to": "2017-04-08 23:59:59",
    "username":"james"
  },
  {
    "date_from": "2017-04-29 00:00:00",
    "date_to": "2017-05-02 23:59:59",
    "username":"jacob"
  }
]

我想渲染一些日历，但第一步是消除超出范围的日期。

我试过这个功能

function isDateWithinRage(date) {
    const when  = moment(date, 'YYYY-MM-DD');
    console.log(when);
    const range = moment.range('2017-04-01','2017-04-30');

    return when.within(range);
}

然后我通过 arr 过滤:

filter(arr, obj => isDateWithinRage(obj.date_from)) // returned empty [], why?

我的代码有什么问题吗？我找不到。

Answer 1

从文档看来，范围限制必须是 moment 对象。

https://github.com/gf3/moment-range#create

function isDateWithinRage(date) {
    const when  = moment(date, 'YYYY-MM-DD');
    const start = moment('2017-04-01', 'YYYY-MM-DD');
    const end   = moment('2017-04-01', 'YYYY-MM-DD');
    const range = moment.range(start, end);
    return when.within(range);
}

var filteredData = arr.filter((obj) => isDateWithinRage(obj.date_from))