$ plk
ClojureScript 1.10.520
cljs.user=> (import '(goog Uri))
nil
cljs.user=> (ns-imports 'cljs.user)
{Uri #object[Function]}
cljs.user=> (import '(goog.net Url))
Execution error (ExceptionInfo) at (<cljs repl>:1).
No such namespace: goog.net.Url, could not locate goog/net/Url.cljs, goog/net/Url.cljc, or JavaScript source providing "goog.net.Url"
cljs.user=> (ns-imports 'cljs.user)
Execution error (Error) at (<cljs repl>:1).
undefined is not an object (evaluating 'goog.net.Url')