thanks to reply, I'm looking for getting more information about "KakaoTalk link API" and how it is suggested by it,
the documentation uses API kakao.min.js library.
Especially, in the following example is requested the app key:
Kakao.init('YOUR APP KEY');
This piece of code is used to initialize Kakao Object and create Link.createTalkLinkButton.
So this means that we have to create an accout on developers web site.
For this reason, my question is:
Could I use that library without using the App Key?
Thanks in advance.