Attempting to utilize the Moment library to format a date variable and then passing it to a DateTimePicker, only to receive a de

Struggling to properly format a date variable and pass it to the Eonasdan datetimepicker for Angular, but no matter what attempts are made, a deprecation warning is received:

Deprecation warning: moment construction falls back to JS Date. This is discouraged and will be removed in an upcoming major release. For more information, refer to https://github.com/moment/moment/issues/1407. Arguments:

Several methods have been attempted:

Date from AJAX - Wed, 05 Jul 2017 00:00:00 GMT

/*example1*/
angular.forEach(tickets, function(value, key){
    $scope.startDate = new Date(value.start_date);
    $scope.endDate = new Date(value.end_date);
});

/*example2*/
angular.forEach(tickets, function(value, key){
    $scope.startDate = moment(startDate, "YYYY-MM-DD");
    $scope.endDate = moment(value.end_date, "YYYY-MM-DD");
});

Here are the datetimepicker options:

$scope.calendarWidgetOptions = {
   format: 'YYYY-MM-DD',
   minDate: moment().startOf('d')
};

Despite trying various solutions, the deprecation warning persists and the date may not display correctly in certain browsers/timezones.

Answer №1

The question at hand is 'Why am I receiving this deprecation warning', and the reason lies in your usage of the moment function in a deprecated manner that is no longer officially supported.

Referencing the provided link:

"...moment construction using a non-iso string is deprecated. This implies that you should instead use..."

> moment("2014-04-25T01:32:21.196Z");  // iso string, utc timezone
> moment("2014-04-25T01:32:21.196+0600");  // iso string with timezone
> moment("2014 04 25", "YYYY MM DD"); // string with format

You are currently utilizing moment like this:

moment(value.end_date, "YYYY-MM-DD");

This method does not perfectly match any of the specified signatures listed above. Therefore, it will be processed by the fuzzy handler which attempts to interpret the input value and provide something usable, leading to the deprecated functionality.

A possible solution would be to precisely match the formatter like so:

moment(value.end_date, "YYYY MM DD");

In addition, you seem to be passing a Date object into moment when it actually expects a String. Converting the Date to a string and then providing it along with the correct formatter to moment might resolve the issue.

moment(value.end_date.toISOString(), "YYYY MM DD");

or

moment(value.end_date.toISOString());

This approach will essentially result in something similar to:

moment("2017-07-05T17:22:49.396Z", "YYYY MM DD");

or

moment("2017-07-05T17:22:49.396Z");

Following this method aligns with the expected signature and should prevent the occurrence of the warning.

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