minDate and maxDate do not work as expected when specify a custom format.

[ubiyf]

In the version 2.4.5 line 1121 and 1125, there is a regular expression check:
/^+-$/.test(options.minDate)
If user specify a custom date format, eg: 'Y-m-d', it will not be matched, so it doesn't work as expected.
It works only with 'Y/m/d' format.

[ghost]

+1
Having the same problem.

Although I get the feeling the owner doesn't look at the issues that often.

[lure]

This is the answer. All possible format options MUST be specified. I am using date only here, so I have to provide both format and formatDate.

  jQuery(function() {
        var fmt = 'DD.MM.YYYY';
        Date.parseDate = function (input, format) {
            return moment(input, format).toDate();
        };
        Date.prototype.dateFormat = function (format) {
            return moment(this).format(format);
        };

        $.datetimepicker.setLocale("en");
        jQuery('#last-login-from').datetimepicker({
            format: fmt,
            formatDate: fmt,
            validateOnBlur: true,
            allowBlank: true,
            closeOnDateSelect: true,
            datepicker: true,
            timepicker: false,
            onShow: function (ct) {
                var endR = jQuery('#last-login-to').val();
                this.setOptions({
                    maxDate: endR ? endR : false
                })
            }
        });
        jQuery('#last-login-to').datetimepicker({
            format: fmt,
            formatDate: fmt,
            validateOnBlur: true,
            allowBlank: true,
            closeOnDateSelect: true,
            datepicker: true,
            timepicker: false,
            onShow: function (ct) {
                var stR = jQuery('#last-login-from').val();
                alert(stR);
                this.setOptions({
                    minDate: stR ? stR : false
                })
            }
        });
    });

[oreynaldocl]

+1, I @lure I tried with your example but doesn't work.

[lure]

@ilacyero try add every existing formats to options. May be you use mins/ hours or forget to initialize the proper library. It works for me everywhere.
Not sure if matter, but I use momentum.

[suhaotian]

same problem