wagtail/docs/_static/js/banner.js

function setCookie(name, value, days) {
  const date = new Date();
  date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
  document.cookie = encodeURIComponent(name) + '=' +
                    encodeURIComponent(value) +
                    '; expires=' + date.toGMTString();
}

function hasCookie(name, value) {
  return document.cookie.split('; ').indexOf(name + '=' + value) >= 0;
}

$(function () {
  const $wagtailspace = $(
    '<a href="https://www.wagtail.space/2019/" class="wagtailspace" title="https://www.wagtail.space/2019/">' +
    '  <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 190 132" width="36" height="36"><defs><path id="a" d="M89.58 26.597C81.876 11.063 65.8.375 47.213.375S12.552 11.063 4.85 26.597C1.746 32.857 0 39.902 0 47.354c0 6.875 1.484 13.404 4.15 19.288 12.926 1.555 27.562 2.432 43.064 2.432 15.503 0 30.138-.877 43.064-2.432 2.667-5.884 4.152-12.413 4.152-19.288 0-7.452-1.747-14.497-4.85-20.757"/></defs><g fill="none" fill-rule="evenodd"><g><g><path fill="#DFDFDF" d="M49.467 127.165h4.465V86.51h-4.465"/><path fill="#DFDFDF" d="M55.836 127.153c0 2.677-2.18 4.847-4.87 4.847s-4.87-2.17-4.87-4.847c0-2.676 2.18-4.846 4.87-4.846s4.87 2.17 4.87 4.846M134.91 127.165h4.466V86.51h-4.465"/><path fill="#DFDFDF" d="M142.404 127.153c0 2.677-2.18 4.847-4.87 4.847s-4.87-2.17-4.87-4.847c0-2.676 2.18-4.846 4.87-4.846s4.87 2.17 4.87 4.846"/><path fill="#D23C2B" d="M94.975 86.13L0 70.85s2.768 30.56 94.975 30.56c92.208 0 94.976-30.56 94.976-30.56L94.976 86.13"/><path fill="#DE4D33" d="M189.95 69.77c0 12.38-42.52 22.415-94.975 22.415C42.523 92.185 0 82.15 0 69.77 0 57.394 42.523 47.36 94.975 47.36c52.454 0 94.974 10.035 94.974 22.413"/><path fill="#DE4D33" d="M189.95 69.77c0 12.38-42.52 22.415-94.975 22.415C42.523 92.185 0 82.15 0 69.77 0 57.394 42.523 47.36 94.975 47.36c52.454 0 94.974 10.035 94.974 22.413"/><g transform="translate(48.343)"><mask id="b" fill="#fff"><use xlink:href="#a"/></mask><use fill="#9FD6E4" xlink:href="#a"/><g mask="url(#b)"><g transform="translate(-25.858 10.068)"><path fill="#8DBEC9" d="M66.328 58.76h.987c6.65-.016 13.134-.195 19.39-.518-.003-.033-1.522-14.294-11.057-29.093-2.158 2.536-5.382 4.146-8.983 4.146-6.5 0-11.77-5.243-11.77-11.712 0-3.97 1.986-7.476 5.022-9.593-6.19-4.746-13.78-8.84-23.1-11.615C33 3.422 29.67 7.045 26.96 11.115c-1.033 1.55-1.98 3.16-2.826 4.828l-.015.03c-.01.017-.017.033-.025.05l-.036.07-.006.01-.09.18c-3.104 6.26-4.852 13.306-4.852 20.76 0 .757.02 1.51.054 2.26.288 6.045 1.725 11.79 4.098 17.026 12.926 1.554 27.562 2.43 43.064 2.43" opacity=".293"/><path fill="#FFF" fill-rule="nonzero" d="M85.573 11.186v5.07s-10.397-3.38-17.124 2.755c-4.894 4.447-5.302 9.427-3.06 16.095 22.018 0 25.483 10.76 25.483 10.76l-2.242-12.36 6.932-7.38c0-8.714-8.256-14.494-9.99-14.94z" opacity=".821"/><ellipse cx="86.568" cy="23.492" fill="#000" fill-rule="nonzero" opacity=".821" rx="2.249" ry="2.237"/><path fill="#000" fill-rule="nonzero" d="M90.537 45.566s-3.35-14.862-25.274-10.833c-2.232-6.715-1.826-11.64 3.045-16.204 6.598-6.18 16.95-2.777 16.95-2.777V10.65c-3.653-1.432-7.104-1.7-10.96-1.7-14.11 0-21.925 9.31-25.274 15.577L9.338 88.897l11.165-1.88L0 121.932l14.31-2.238L25.274 92.21c31.06 0 70.846-9.85 65.264-46.644zM104.556 33.56l-8.79-7.83-6.95 7.83" opacity=".821"/><path fill="#FFF" fill-rule="nonzero" d="M30.355 83.898s1.006-.177 2.818-.53c1.812-.356 4.328-.887 7.347-1.596 1.51-.355 3.12-.798 4.83-1.33 1.712-.53 3.523-1.063 5.234-1.77 1.812-.622 3.624-1.42 5.435-2.305 1.81-.886 3.522-1.86 5.132-3.013.402-.266.805-.53 1.208-.886l1.207-.886c.705-.62 1.51-1.24 2.215-1.95.704-.62 1.308-1.328 1.912-2.037l.906-1.063.402-.532.403-.532c.2-.354.503-.708.704-1.063.2-.354.402-.71.704-1.063.1-.177.2-.355.302-.532.1-.177.2-.354.302-.53.2-.356.402-.71.503-1.065l.907-2.126c.2-.71.503-1.42.704-2.04.202-.62.303-1.328.504-1.86.1-.62.202-1.152.302-1.772.1-.532.2-1.063.2-1.506.102-.443.102-.886.203-1.33.1-1.594.1-2.48.1-2.48l1.61.088s-.1.975-.202 2.57c-.1.443-.1.886-.2 1.33-.102.53-.102 1.062-.303 1.594-.1.53-.302 1.152-.402 1.772-.202.62-.403 1.24-.604 1.95-.203.708-.504 1.328-.806 2.126-.302.71-.604 1.417-1.007 2.215-.2.354-.402.71-.604 1.063-.1.177-.2.355-.302.532l-.3.53c-.202.356-.504.71-.705 1.153-.302.355-.503.71-.805 1.064-.1.176-.302.353-.403.53l-.402.532-.906 1.063c-.706.71-1.31 1.418-2.115 2.038-.704.71-1.51 1.24-2.314 1.95l-1.207.885c-.403.266-.805.532-1.31.798-1.71 1.063-3.52 2.038-5.333 2.924-1.81.797-3.723 1.595-5.535 2.215-1.812.62-3.623 1.152-5.334 1.595-1.71.443-3.32.886-4.93 1.152-3.02.62-5.637 1.152-7.448 1.417-1.61.53-2.617.708-2.617.708z" opacity=".821"/></g></g></g><path fill="#9FD6E4" d="M75.325 68.613h.002-.002"/><path fill="#C7462F" d="M95.425 69.054h-.174.175c15.502 0 30.138-.877 43.064-2.432 2.372-5.235 3.81-10.982 4.097-17.027-.288 6.045-1.725 11.792-4.098 17.027-12.927 1.555-27.563 2.432-43.065 2.432m-.23 0h-.114.114m-.198 0h-.085.086m-.18 0h-.07.07m-.192 0h-.034.034m-.178 0h-.008.008"/><path fill="#1D2533" d="M137.33 26.445l-.09-.18.09.18m-.095-.19l-.036-.072c.01.023.024.047.035.072m-.06-.12l-.015-.03.016.03"/><path fill="#FFFFFE" d="M31.976 65.48c0 1.978-3.635 3.58-8.118 3.58-4.484 0-8.118-1.602-8.118-3.58 0-1.977 3.634-3.58 8.118-3.58 4.483 0 8.118 1.603 8.118 3.58M170.26 65.48c0 1.978-3.634 3.58-8.118 3.58s-8.118-1.602-8.118-3.58c0-1.977 3.634-3.58 8.118-3.58s8.118 1.603 8.118 3.58M58.957 76.666c0 1.977-3.634 3.58-8.117 3.58-4.483 0-8.118-1.603-8.118-3.58 0-1.976 3.635-3.58 8.118-3.58 4.483 0 8.117 1.604 8.117 3.58M145.525 76.666c0 1.977-3.634 3.58-8.117 3.58-4.484 0-8.118-1.603-8.118-3.58 0-1.976 3.634-3.58 8.118-3.58 4.483 0 8.117 1.604 8.117 3.58M103.93 80.022c0 1.977-3.636 3.58-8.12 3.58-4.483 0-8.118-1.603-8.118-3.58 0-1.976 3.635-3.58 8.12-3.58 4.482 0 8.117 1.604 8.117 3.58"/></g></g></g></svg>' +
    '  <div>' +
    '    <strong>Wagtail Space</strong><br> 13 – 15 March 2019 Arnhem, The&nbsp;Netherlands' +
    '  </div>' +
    '  <span class="close" title="Hide banner">×</span>' +
    '</a>'
  );

  if (!hasCookie('wagtailspaceClosed', 'true')
    && new Date() < new Date(2019, 2, 15)) {
    $('.wy-nav-content').prepend($wagtailspace);
    $wagtailspace.find('.close').click(function (e) {
      e.preventDefault();
      setCookie('wagtailspaceClosed', 'true', 30);
      $wagtailspace.detach();
    });
  }
});