mozilla-release/toolkit/content/datepicker.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
   - You can obtain one at http://mozilla.org/MPL/2.0/. -->

<!DOCTYPE html [
  <!ENTITY % htmlDTD PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
  %htmlDTD;
]>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<head>
  <title>Date Picker</title>
  <link rel="stylesheet" href="chrome://global/skin/datetimeinputpickers.css"/>
  <script src="chrome://global/content/bindings/datekeeper.js"></script>
  <script src="chrome://global/content/bindings/spinner.js"></script>
  <script src="chrome://global/content/bindings/calendar.js"></script>
  <script src="chrome://global/content/bindings/datepicker.js"></script>
</head>
<body>
  <div id="date-picker">
    <div class="calendar-container">
      <div class="nav">
        <button class="prev"/>
        <button class="next"/>
      </div>
      <div class="week-header"></div>
      <div class="days-viewport">
        <div class="days-view"></div>
      </div>
    </div>
    <div class="month-year-container">
      <button class="month-year"/>
    </div>
    <div class="month-year-view"></div>
  </div>
  <template id="spinner-template">
    <div class="spinner-container">
      <button class="up"/>
      <div class="spinner"></div>
      <button class="down"/>
    </div>
  </template>
  <script>
  /* import-globals-from widgets/datepicker.js */
  // We need to hide the scroll bar but maintain its scrolling
  // capability, so using |overflow: hidden| is not an option.
  // Instead, we are inserting a user agent stylesheet that is
  // capable of selecting scrollbars, and do |display: none|.
  var domWinUtls = window.windowUtils;
  domWinUtls.loadSheetUsingURIString('data:text/css,@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); scrollbar { display: none; }', domWinUtls.AGENT_SHEET);
  // Create a DatePicker instance and prepare to be
  // initialized by the "DatePickerInit" event from datetimepopup.xml
  const root = document.getElementById("date-picker");
  new DatePicker({
    monthYear: root.querySelector(".month-year"),
    monthYearView: root.querySelector(".month-year-view"),
    buttonPrev: root.querySelector(".prev"),
    buttonNext: root.querySelector(".next"),
    weekHeader: root.querySelector(".week-header"),
    daysView: root.querySelector(".days-view"),
  });
  </script>
</body>
</html>