Please don't try to just implement that yourself. The URL and URI classes do a LOT. If you remove it, we need a multiplatform alternative. There are people relying on these errors being thrown.

full URL as String is better alternatives of it.

Like what?

But how do we deal with encoding of the parameters? It will be quite a pain if we don’t have an easy way to encode it for our user?

JS always Unicode. JVM has a choice. Native may have a choice.