Chat on WhatsApp In the above example, replace "923253623514" with the phone number you want to open the WhatsApp chat with. The "height" and "width" values in the method can be adjusted to your desired size. It will open a new window of WhatsApp on web and the number will be pre-filled. If you want to open directly on mobile device without web-browser, you can use the following link: Copy code Chat on WhatsApp This code will open the WhatsApp mobile app (if