I am looking for a way to open whatsapp chat through a webpage opened in mobile browser. Like if a user opens my webpage using a smart device and clicks on a link, it should open the whatsapp chat application on the smart device.
I did some research and found that using <a href="whatsapp://send?abid=&text="></a> does exactly that, but I am unclear about abid. Its an address book ID, but how to get that id, like if the user has my number in its contact list, how to get the id?
And I also want to give an option to the user to add my number to its contact list if its not already there, how can I do that?