thanks in advance.
I have already searched and implemented
$(document).ready(function () { $(\"#ui-datepicker\").datepicker(); });
$(…).datepicker is not a function
The Order of your script is wrong,
Jquery Library file should be always on top, then jquery-ui. Keep
modernizr-2.8.3.js
after
jquery-3.1.1.js and jquery-ui-1.12.1.js