Is it possible to like and dislike a post without logging in? I have seen websites use likes and dislikes without login but I don’t know how. They do not require to be logged in and once the post is liked, it can not be liked again when refreshed or even when the cookies are deleted. An example can be found here.
Edit: Link removed for obvious reasons
First of all, how did they make the react buttons? (Those emoticons below).
And second, the comment section. You are able to like it without logging in. What is the logic behind this?