以字符串格式提供时刻时的 ISO 格式弃用警告

Question

const DATE_FORMAT = "YYYY-MM-DD";
const endDate = "2020-05-05T00:00:00.000Z" (dynamic value from service)
const appValidDate = moment(endDate).subtract(1, "days").format(DATE_FORMAT);
const currentDate = moment().startOf("day").format(DATE_FORMAT);
const validDate = moment(currentDate).isSameOrBefore(appValidDate);

I have been trying to compare two dates using moment. While running the application, i am getting the below deprecation warning.

Deprecation warning: value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are discouraged and will be removed in an upcoming major release. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.
Arguments:
[0] _isAMomentObject: true, _isUTC: false, _useUTC: false, _l: undefined, _i: Invalid date, _f: undefined, _strict: undefined, _locale: [object Object]
Error:

Found some usefult stackoverflow links: Moment.js deprecation warning when comparing two dates

But still not able to remove the deprecation warning.

So as per the doc, need to be in string + format, so i have done like this:

const DATE_FORMAT = "YYYY-MM-DD";
const endDate = "2020-05-05T00:00:00.000Z" (dynamic value from service)
const appValidDate = moment(endDate).subtract(1, "days").format(DATE_FORMAT);
const currentDate = moment().startOf("day").format(DATE_FORMAT);
const validDate = moment(currentDate, DATE_FORMAT).isSameOrBefore(appValidDate);

But the problem is we can't convert endDate to string & then subtract the days. If i am passing like that, getting Moment error.

Can anybody help me to find a proper solution for this. Any help would be really appreciated.

Answer 1

As explained in the comments above, do your date comparison using moment instances.

The value returned by .format() is a string and depending on the format chosen (and possibly your locale) may trigger the warning you're seeing.

Use .format() when you want to display a value.

 const DATE_FORMAT = "YYYY-MM-DD"; const endDate = "2020-05-05T00:00:00.000Z" //(dynamic value from service) const appValidDate = moment(endDate).subtract(1, "days"); const currentDate = moment().startOf("day"); // or for a UTC "start of day" // const currentDate = moment.utc().startOf('day') const validDate = currentDate.isSameOrBefore(appValidDate); console.log('appValidDate:', appValidDate.format(DATE_FORMAT)) console.log('currentDate:', currentDate.format(DATE_FORMAT)) console.log('validDate:', validDate)

 <script src="https://momentjs.com/downloads/moment.js"></script>

Answer 2

I was getting the same issue, I used below snippet, it worked for me

moment(date, moment.ISO_8601)

Thank You