How to use WhatsApp web version in your computer?

Recently, WhatsApp, I mean Facebook has launched the web version of WhatsApp. Yes! WhatsApp is the most popular instant messenging app and till date, it was used in smartphones. To use WhatsApp in a PC, we had to use emulators. But now it is available in web version also which means you can use WhatsApp web version directly from your computer but there is a small limitation that both the