window.WebChat.renderWebChat(
  {
    directLine,
    locale,
    styleOptions: {
      botAvatarInitials: 'WC',
      userAvatarInitials: 'WW',
      bubbleBorderRadius: 20,
      bubbleNubOffset: 10,
      bubbleNubSize: 10,
      bubbleFromUserBorderRadius: 20,
      bubbleFromUserNubOffset: 10,
      bubbleFromUserNubSize: 10
    }
  },
  document.getElementById('webchat')
);