Date Range Picker

[chris0055]

Hi,

I'm creating a custom module that allows me to set a expiry date for a product. I had been using datepicker from jQuery UI which were deprecated on 7.8.

I learned that WHMCS is using daterangepicker yet I'm not sure how exactly can I use it in my application, assuming I have the following field:

<input class="form-control date-picker-single" type="text" name="expiry" value="<?php echo $input->post('expiry', date('Y-m-d', strtotime("+7 day"))); ?>">

date-picker-single was inherited from WHMCS. In the invoice creating page, I found that WHMCS sets the adminJsVars variable yet when I tried the same setting, my custom date picker shows me Nan
 

<script>var adminJsVars = {"today":"2020-12-03","minYear":2000,"maxYear":2050,"dateRangeFormat":....</script>

Anyone can share how they implement this? Thanks