javascript - 输入起始日期后更改截止日期

Question

我有一个字段。一个是 ValidFrom 日期，另一个是 ValidTo 日期。

我的问题是，如果使用DateTimePicker输入ValidFrom日期，我应该如何将ValidTo更改为3 0 auto 天数？

以下是我的DateTimePicker代码:

<script src="~/Scripts/jquery.datetimepicker.js"></script>
<script>
    $(document).ready(function () {
        $('#ValidFrom').datetimepicker({
            datepicker: true,
            timepicker: false,
            format: 'm/d/Y',
            step: 30,
            minDate: new Date(),
            onChangeDateTime: function (dp, $input) {
                var date = new Date($input.val());
                date.setMonth(date.getMonth() + 1);
                $('#ValidTo').datetimepicker({
                    datepicker: true,
                    timepicker: false,
                    format: 'm/d/Y',
                    step: 30,
                    minDate: date,
                });
            },

        });

    });
</script>

I have to change the ValidTo date by 30 days as and when ValidFrom date is entered.

Answer 1

代码应该是这样的:经过多次尝试才完成

<script>
    $(document).ready(function () {
        $('#ValidFrom').datetimepicker({
            datepicker: true,
            timepicker: false,
            format: 'm/d/Y',
            step: 30,
            minDate: new Date(),
            onChangeDateTime: function (dp, $input) {
                var date = new Date($input.val());
                date.setMonth(date.getMonth() + 1);
                date = (date.getMonth() + 1) + '/' + date.getDate() + '/' + date.getFullYear();
                $('#ValidTo').val(date);
            },

        });
        $('#ValidTo').datetimepicker({
            datepicker: true,
            timepicker: false,
            format: 'm/d/Y',
            step: 30,
            minDate: new Date()
        });
    });

</script>