Working date changer!

src/DatePicker/DatePicker.bs.js

@@ -1,13 +1,24 @@
 'use strict';
 
+var Curry = require("bs-platform/lib/js/curry.js");
 var React = require("react");
 var Moment = require("moment");
 
 function DatePicker(Props) {
-  var date = Moment().format("YYYY-MM-DD");
+  var match = React.useState((function () {
+          return Moment();
+        }));
+  var updateDate = match[1];
+  var handleChange = function ($$event) {
+    var value = $$event.target.value;
+    return Curry._1(updateDate, (function (param) {
+                  return Moment(value, "YYYY-MM-DD");
+                }));
+  };
   return React.createElement(React.Fragment, undefined, React.createElement("input", {
                   type: "date",
-                  value: date
+                  value: match[0].format("YYYY-MM-DD"),
+                  onChange: handleChange
                 }));
 }
 

src/DatePicker/DatePicker.re

@@ -1,5 +1,21 @@
+type formattedString = string;
+
 [@react.component]
 let make = () => {
-  let date = MomentRe.momentNow() |> MomentRe.Moment.format("YYYY-MM-DD");
+  let (date: MomentRe.Moment.t, updateDate) =
-  <> <input type_="date" value=date /> </>;
+    React.useState(MomentRe.momentNow);
+
+  let formatDate: MomentRe.Moment.t => formattedString =
+    (date: MomentRe.Moment.t) => {
+      date |> MomentRe.Moment.format("YYYY-MM-DD");
+    };
+
+  let handleChange = (event: ReactEvent.Form.t) => {
+    let value: formattedString = ReactEvent.Form.target(event)##value;
+    updateDate(_ => {value->MomentRe.momentWithFormat("YYYY-MM-DD")});
+  };
+
+  <>
+    <input type_="date" value={formatDate(date)} onChange=handleChange />
+  </>;
 };