type formattedString = string;

@react.component
let make = () => {
  let (date: MomentRe.Moment.t, updateDate) =
    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 />
  </>;
};