could I modify dom generated by render-fn in :wrap-render mixin? like show a popup below the dom

@sniperliuhao yes

@tonsky thanks. Is there a way to dynamically assign mixin to a component? for example, i expect to put some mixin in dev mode. Or i could just switch off the mixin. One way i found in github is to avoid defc macros, use build-ctor instead.

not in default rum, no

but playing with build-ctor, I think it’s possible

@sniperliuhao I’m sure you can also define a mixin conditionally which does nothing (i.e. {})

You could easily do that with closure-defines https://www.martinklepsch.org/posts/parameterizing-clojurescript-builds.html

(def my-dev-mixin
  (if (identical? true defines/DEV)
    {:did-mount ,,,}
    {}))

Maybe you could also use true? instead of identical?