When asking such questions, please always provide the relevant code. It's nearly impossible to help otherwise.

Alright.

The relevant code is:

[:> (.. js/scrollingPanel -Container)
        {:direction "horizontal"}]

outputs in the DOM to: <div css="{Object object]">

the library is https://openbase.com/js/react-scrolling-panel/documentation

That's 100% not all the relevant code. Also, don't use js/scrollingPanel unless you really have to for some reason - instead, use a regular NPM package and regular imports.

This works just fine without any issues:

(ns app.core
  (:require [clojure.browser.dom]
            [reagent.dom]
            ["react-scrolling-panel" :refer [Container Panel]]))

(defn app []
  [:div {:style {:display :flex}}
   [:> Container {:direction :horizontal}
    [:> Panel {:flex 1}
     "Main Navigation"]
    [:> Panel {:flex 3}
     "Posts"]]])

(defn ^:export main []
  (reagent.dom/render [app] (clojure.browser.dom/get-element :app)))

Oh really

we don't use regular imports in our app, but it's probably not linked, it usually works just fine

Ah, hold on. It renders it, but that css attribute is still there.

oh yeah

Why do you not use regular imports?

just because regular imports weren't a thing when the initial devs started the project

Ah, alright. FWIW, I'm pretty certain react-scrolling-panel is just broken. It hasn't been updated in 2 years, which in the modern web development world makes it ancient. And it just assigns css attributes to React elements - which is not valid in at least modern React.

ah okay, I thought it was a thing with styled-components or something, but you might be right

Oh the library was made to work with emotion and requires you to swap React's implementation of createElement with a different one. But it's not documented at all. Either way, I would stay away from this library. And it's literally 50 lines of TSX code - you can just rewrite it all in CLJS with no issues.

Yeah, you're right. Thank you!