Мне кажется дело в версии библиотеки
Вот что пишет консоль:
Failed to load resource: net::ERR_FILE_NOT_FOUND
jquery-ui.js Failed to load resource: net::ERR_FILE_NOT_FOUND
jquery.min.js:2 jQuery.Deferred exception: $(...).datepicker is not a function TypeError: $(...).datepicker is not a function
at HTMLDocument.<anonymous> (file:///C:/Users/%D0%9F%D0%9A/Desktop/123/script.js:2:31)
at j (
https://ajax.googleapis.com/ajax/lib...min.js:2:29948)
at k (
https://ajax.googleapis.com/ajax/lib...min.js:2:30262) undefined
r.Deferred.exceptionHook @ jquery.min.js:2
jquery.min.js:2 jQuery.Deferred exception: $(...).datepicker is not a function TypeError: $(...).datepicker is not a function
at HTMLDocument.<anonymous> (file:///C:/Users/%D0%9F%D0%9A/Desktop/123/index.html:17:31)
at j (
https://ajax.googleapis.com/ajax/lib...min.js:2:29948)
at k (
https://ajax.googleapis.com/ajax/lib...min.js:2:30262) undefined
r.Deferred.exceptionHook @ jquery.min.js:2
jquery.min.js:2 Uncaught TypeError: $(...).datepicker is not a function
at HTMLDocument.<anonymous> (script.js:2)
at j (jquery.min.js:2)
at k (jquery.min.js:2)
jquery.min.js:2 Uncaught TypeError: $(...).datepicker is not a function
at HTMLDocument.<anonymous> (index.html:17)
at j (jquery.min.js:2)
at k (jquery.min.js:2)