code: function display(runner) {
    var stats = runner.stats;
    var symbol = {
      cross: '\u274C',
      tick: '\u2705'
    };
    var logo = require('../../package').notifyLogo;
    var _message;
    var message;
    var title;
  
    if (stats.failures) {
      _message = stats.failures + ' of ' + stats.tests + ' tests failed';
      message = symbol.cross + ' ' + _message;
      title = 'Failed';
    } else {
      _message = stats.passes + ' tests passed in ' + stats.duration + 'ms';
      message = symbol.tick + ' ' + _message;
      title = 'Passed';
    }
  
    // Send notification
    var options = {
      badge: logo,
      body: message,
      dir: 'ltr',
      icon: logo,
      lang: 'en-US',
      name: 'mocha',
      requireInteraction: false,
      timestamp: Date.now()
    };
    var notification = new Notification(title, options);
  
    // Autoclose after brief delay (makes various browsers act same)
    var FORCE_DURATION = 4000;
    setTimeout(notification.close.bind(notification), FORCE_DURATION);
  }
docs: Displays the notification.
  
  @private
  @param {Runner} runner - Runner instance.