问题描述
我有两个日期范围，一个来自API，另一个来自用户输入。两者都是ISO格式。
API的日期范围：
dateStart 2019-04-01T03:04:00Z
dateStop 2019-04-01T03:05:00Z
用户输入的日期范围：
convertedDateFrom 2020-09-15T18:30:00.000Z
convertedDateto 2020-09-21T18:30:00.000Z
我想将date range from user input转换为date range from API。我该如何实现？
EXPECTED: I want to compare the values two date-ranges and depending on that
I will perform certain export functionality.
The user input date-range Could
- fall completely within the date-range of the API
- or at least one of the date values Could fall or overlap within the
date-range from the API.
应与API中的日期范围重叠。
这是我的date range picker handle()
handleDatePickerChange = (setSelectedDayRange) => {
console.log("initializing handleDatePickerChange()");
console.log("setSelectedDayRange",setSelectedDayRange);
// Todo
// convert the dates
let convertedDateFrom = moment(setSelectedDayRange.from).toISOString();
console.log("convertedDateFrom",convertedDateFrom);
let convertedDateto = moment(setSelectedDayRange.to).toISOString();
console.log("convertedDateto",convertedDateto);
// compare dates
// if(convertedDateFrom === )
// check if data exists
this.setState({
selectedDayRange: setSelectedDayRange,});
};
解决方法
Ciao，您可以通过以下方式使用瞬间提供的功能isBetween：
// interval comes from API
let dateAPIFrom = moment().toISOString();
let dateAPITo = moment().add(2,"days").toISOString();
// user date interval
let convertedDateFrom = moment(setSelectedDayRange.from).toISOString();
let convertedDateTo = moment(setSelectedDayRange.to).toISOString();
if (
moment(convertedDateFrom)
.subtract(1,"month")
.isBetween(dateAPIFrom,dateAPITo) &&
moment(convertedDateTo)
.subtract(1,dateAPITo)
) {
//The user input date-range fall completely within the date-range of the API
} else if (
moment(convertedDateFrom)
.subtract(1,dateAPITo) ||
moment(convertedDateTo)
.subtract(1,dateAPITo)
) {
//or at least one of the date values could fall or overlap within the date-range from the API.
}
.subtract(1,"month")，因为moment({day: 19,month: 8,year: 2020}).toISOString()总是返回month + 1。
Here您的代码和框已修改。
,它们都是ISO-8601日期，可以很容易地转换为本地Date对象，可以将其转换为自Unix时代以来的毫秒数。您不需要任何复杂的逻辑，甚至不需要为此使用moment。
/**
* If result is negative,the first date is earlier
* If result is positive,the second date is earlier
* If result is 0,both dates are exactly the same
*/
const compareIsoDates = (isoString1,isoString2) => {
return new Date(isoString1).valueOf() - new Date(isoString2).valueOf()
}
// result is -46106760000,meaning first date is earlier
console.log(compareIsoDates('2019-04-01T03:04:00Z','2020-09-15T18:30:00.000Z'))
/**
* strictly between (cannot be the same as start or end)
* if you want to allow same as start and end,change to
* >= and <= instead of > and <
*/
const isStrictlyBetween = (targetDate,[startDate,endDate]) => {
return compareIsoDates(targetDate,startDate) > 0
&& compareIsoDates(targetDate,endDate) < 0
}
// true
console.log(isStrictlyBetween(
'2020-05-01T00:00:00.000Z',['2020-04-20T18:30:00Z','2020-05-10T00:00:00Z']
))
// you can also use `compareIsoDates` a sort function to sort an array of
// ISO strings in ascending order (earliest to latest)
console.log([
"1998-02-12T08:18:27.991Z","2005-03-19T19:48:59.501Z","1997-05-01T14:58:13.848Z","2008-08-31T01:30:11.880Z","2004-08-05T16:07:55.443Z"
].sort(compareIsoDates)),
ISO日期格式的一大优点是它们可以按字母顺序排序。
这意味着，尽管您可以将其转换为Date / moment等，但是您将获得与将它们作为字符串进行比较完全相同的结果。
例如，您可以将Lionel的compareISODates函数编写为：
/**
* If result is negative,both dates are exactly the same
*/
const compareISODates = (isoString1,isoString2) => {
return isoString1.localeCompare(isoString2);
};
或者作为另一个示例，convertedDateFrom/To完全属于dateStart/End，您只需检查是否
convertedDateFrom >= dateStart && convertedDateTo <= dateEnd
当然，如果您需要更复杂的逻辑，则应使用上面提到的日期库之一。