How can I include special characters in query strings?

Question

URL http://localhost/mysite/mypage?param=123 works fine. However, if I want to put some special characters in param, like ?, /

Answer 1

I did below, it works fine.

const myQueryParamValue = "You&Me";
const ajaxUrl = "www.example.com/api?searchText="+encodeURIComponent(myQueryParamValue)