/**
 * scrollbar
 */

(function () {
  if (navigator.platform.match(/win32/i)) {
    var cssId = '_webkit-scrollbar';
    if (!document.getElementById(cssId)) {
      var head = document.getElementsByTagName('head')[0];
      var style = document.createElement('style');
      style.id = cssId;
      style.innerText = `
        ::-webkit-scrollbar { width: 6px; height: 6px; background-color: #fff; }
        ::-webkit-scrollbar-track { background-color: #fff; }
        ::-webkit-scrollbar-thumb { background-color: #ccc; border: 1px solid #ddd; }
        `;
      head.appendChild(style);
    }
  }
})();