In clojure, set! can only be used on dynamic vars, that are currently bound. Apparently, clojurescript allows set! on root-bound vars, but I wouldn't rely on that. Your use case with matching set! pairs really has the semantics of just calling def. A much safer way to temporarily alter the root binding of a var (though still prone to concurrency bugs), is with-redefs.
I'd really think twice before requiring your users to insert matching pairs of mutation in their code. It goes against the grain of clojure and is error-prone. Why can't on-jsload (is that figwheel's?) just run the update within a (binding [*warn-on-overwrite* false] ...)? -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojurescript+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/clojurescript.