You can use WhatsApp on your computer through
Web WhatsApp. Just open
https://web.whatsapp.com in your browser. A QR code will appear on the screen. Now, open WhatsApp on your phone, tap on
Menu (⋮) > Linked Devices > Link a Device, and scan the QR code. Your chats will instantly appear on your computer screen. Make sure your phone stays connected to the internet while using Web WhatsApp.