how to install whatssap for linux code example

Example: whatsapp web for ubuntu

#!/usr/bin/env xdg-open
[Desktop Entry]
Name=WhatsApp
GenericName=WhatsApp
Comment=WhatsApp desktop webapp
#Exec=webapp-container --store-session-cookies --webappUrlPatterns=https?://*.whatsapp.com/* --user-agent-string='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36 Edg/85.0.564.44' https://web.whatsapp.com %u
Exec=/opt/google/chrome/google-chrome --app=https://web.whatsapp.com/
Terminal=false
Type=Application
StartupNotify=true
MimeType=text/plain;
# If you want icon, type path of icon
# Icon=
Categories=Network;Application;
Keywords=WhatsApp;webapp;
X-Ubuntu-Gettext-Domain=WhatsApp
StartupWMClass=web.whatsapp.com