https://w3lessons.info/2018/07/18/customer-support-chat-system-jquery-whatsapp/
origin - http://www.pipiscrew.com/2018/07/simple-customer-support-chat-system-using-jquery-whatsapp-api/ simple-customer-support-chat-system-using-jquery-whatsapp-api
https://w3lessons.info/2018/07/18/customer-support-chat-system-jquery-whatsapp/
origin - http://www.pipiscrew.com/2018/07/simple-customer-support-chat-system-using-jquery-whatsapp-api/ simple-customer-support-chat-system-using-jquery-whatsapp-api