How to npm packages in Fulcro?

Question

I'm following the Fulcro 3 Dev Guide, section Using Javascript React Components, with the Fulcro Template project, trying to import the Material-UI React components.

I added the package with npm install --save @material-ui/core and modified the demo_ws.cljs file

(ns app.demo-ws
  (:require [com.fulcrologic.fulcro.components :as fp]
            [nubank.workspaces.core :as ws]
            [nubank.workspaces.card-types.fulcro3 :as ct.fulcro]
            [com.fulcrologic.fulcro.mutations :as fm]
            [com.fulcrologic.fulcro.dom :as dom]
            ["@material-ui/core/Button" :default material-button]
            [com.fulcrologic.fulcro.algorithms.react-interop :as interop]
            ))

(def ui-button (interop/react-factory material-button))

(fp/defsc FulcroDemo
  [this {:keys [counter]}]
  {:initial-state (fn [_] {:counter 0})
   :ident         (fn [] [::id "singleton"])
   :query         [:counter]}
  (dom/div
    (str "Fulcro counter demo [" counter "] ")
    (ui-button
      {:variant "contained"
       :color "primary"}
      "Another Button")
    (dom/button {:onClick #(fm/set-value! this :counter (inc counter))} "+")))

(ws/defcard fulcro-demo-card
  (ct.fulcro/fulcro-card
    {::ct.fulcro/root       FulcroDemo
     ::ct.fulcro/wrap-root? true}))

and having the error in the console:

Uncaught TypeError: Cannot read property 'root' of undefined
    at eval (Button.js:323)
    at renderWithHooks (react-dom.development.js:16242)
    at updateForwardRef (react-dom.development.js:18125)
    at beginWork$1 (react-dom.development.js:20187)
    at HTMLUnknownElement.callCallback (react-dom.development.js:337)
    at Object.invokeGuardedCallbackImpl (react-dom.development.js:386)
    at invokeGuardedCallback (react-dom.development.js:441)
    at beginWork$$1 (react-dom.development.js:25739)
    at performUnitOfWork (react-dom.development.js:24666)
    at workLoopSync (react-dom.development.js:24639)

Answer 1

It turns out that it wasn't a fulcro issue as mentioned in this places.

What worked for me, as was adding the hoist-non-react-statics version 3.3.0 as pointed here and updating react and react-dom packages.