How to validate input field for strict link input?

Question

JavaScript

Tell me how to make validation in the input field for the link so that only the link can be entered? I looked on the Internet, but there are regulars everywhere, but I have not studied them yet. If you know a site where they explain how to do such a validation, please share) The

question is removed. I realized that without regular it will not work

Answer 1

regulars. From the fact that you have not yet studied them, new functionality will not appear in the language. Accordingly, either teach "forward", or do not take on anything, because you have not yet learned everything new ...

Answer 2

Without regular expressions, you won't get much done.