let datepicker_wrapper = document.querySelector(".datepicker-wrapper");
console.log("datepicker-wrapper: ", datepicker_wrapper);

let mydate = document.createElement("input");
mydate.setAttribute('type', 'text');
mydate.setAttribute('style', 'margin-top:10px;');
datepicker_wrapper.appendChild(mydate);

console.log("mydate: ", mydate);
mydate.value = "oups";

$(mydate).datepicker({dateFormat: "yymmdd",});