This new feature is expected to be released in few weeks. WhatsApp currently supports voice and video calls only on its mobile app, very soon those features will be updated in WhatsApp Web. WhatsApp Web lets you to do almost all the important things you can on mobile app except video and voice call. A new pop-up window will appear on the screen when there’s an incoming call. You can either accept or decline it. When you make a call on WhatsApp Web a smaller window will pop-up with actions.