A protocol like below will work in Clojure without issue, but in ClojureScript the _'s will apparently (quietly) override each other left to right.
(defprotocol Linkable
(-href [_ _ _]))
Even if the extend-protocol has unique names for the args, the dispatch seems to happen on the last argument.
Repro at https://github.com/valerauko/proto-repro/commit/a8ad51a225ed44ed134b28a18cc83d272d0d8321
Using distinct argument names in the defprotocol solves the issue. I think if it doesn't / can't work like in JVM Clojure it should warn about this issue.