Deprecated findDOMNode warning in StrictMode

[leonardoarroyo]

This issue was already created(#4577). When it was closed, react-transition-group had not yet been updated. There's a new release in react-transition-node which fixed the issue. Can we get that dep updated?

[fzaninotto]

Fixed by #4597

[rlems]

I still seem to have this issue with react-transition-group 4.3.0 installed.
I think the issue is solved in 4.4.0: https://github.com/reactjs/react-transition-group/releases/tag/v4.4.0
In the SimpleFormIterator there'd have to be a nodeRef provided to the CCSTransition and li component.

[GimpMaster]

Sorry to comment on a closed issue, but I am still seeing this issue even with react-transition-group version 4.4.1

Here is yarn.lock

react-transition-group@^4.4.0, react-transition-group@^4.4.1:
  version "4.4.1"
  resolved "https://registry.yarnpkg.com/react-transition-group/-/react-transition-group-4.4.1.tgz#63868f9325a38ea5ee9535d828327f85773345c9"
  integrity sha512-Djqr7OQ2aPUiYurhPalTrVy9ddmFCCzwhqQmtN+J3+3DzLO209Fdr70QrN8Z3DsglWql6iY1lDWAfpFiBtuKGw==
  dependencies:
    "@babel/runtime" "^7.5.5"
    dom-helpers "^5.0.1"
    loose-envify "^1.4.0"
    prop-types "^15.6.2"

Here is the error I'm seeing:

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode. Instead, add a ref directly to the element you want to reference. Learn more about using refs safely here: https://fb.me/react-strict-mode-find-node
    in div (created by ForwardRef(Paper))
    in ForwardRef(Paper) (created by WithStyles(ForwardRef(Paper)))
    in WithStyles(ForwardRef(Paper)) (created by Transition)
    in Transition (created by ForwardRef(Grow))
    in ForwardRef(Grow) (created by Unstable_TrapFocus)
    in Unstable_TrapFocus (created by ForwardRef(Modal))
    in div (created by ForwardRef(Modal))
    in ForwardRef(Portal) (created by ForwardRef(Modal))
    in ForwardRef(Modal) (created by ForwardRef(Popover))
    in ForwardRef(Popover) (created by WithStyles(ForwardRef(Popover)))
    in WithStyles(ForwardRef(Popover)) (created by ForwardRef(Menu))
    in ForwardRef(Menu) (created by WithStyles(ForwardRef(Menu)))
    in WithStyles(ForwardRef(Menu)) (created by ForwardRef(SelectInput))
    in ForwardRef(SelectInput) (created by ForwardRef(InputBase))
    in div (created by ForwardRef(InputBase))
    in ForwardRef(InputBase) (created by WithStyles(ForwardRef(InputBase)))
    in WithStyles(ForwardRef(InputBase)) (created by ForwardRef(FilledInput))
    in ForwardRef(FilledInput) (created by WithStyles(ForwardRef(FilledInput)))
    in WithStyles(ForwardRef(FilledInput)) (created by ForwardRef(Select))
    in ForwardRef(Select) (created by WithStyles(ForwardRef(Select)))
    in WithStyles(ForwardRef(Select)) (created by ForwardRef(TextField))
    in div (created by ForwardRef(FormControl))
    in ForwardRef(FormControl) (created by WithStyles(ForwardRef(FormControl)))
    in WithStyles(ForwardRef(FormControl)) (created by ForwardRef(TextField))
    in ForwardRef(TextField) (created by WithStyles(ForwardRef(TextField)))
    in WithStyles(ForwardRef(TextField)) (created by ResettableTextField)
    in ResettableTextField (created by SelectInput)
    in SelectInput (at user.edit.tsx:9)
    in ReferenceInputView (created by ReferenceInput)
    in ReferenceInput (at user.edit.tsx:8)
    in div (created by FormInput)
    in FormInput (created by SimpleFormView)
    in div (created by ForwardRef(CardContent))
    in ForwardRef(CardContent) (created by WithStyles(ForwardRef(CardContent)))
    in WithStyles(ForwardRef(CardContent)) (created by CardContentInner)
    in CardContentInner (created by SimpleFormView)
    in form (created by SimpleFormView)
    in SimpleFormView (created by FormView)
    in FormView (created by ReactFinalForm)
    in ReactFinalForm (created by FormWithRedirect)
    in FormWithRedirect (created by SimpleForm)
    in SimpleForm (at user.edit.tsx:7)
    in div (created by ForwardRef(Paper))
    in ForwardRef(Paper) (created by WithStyles(ForwardRef(Paper)))
    in WithStyles(ForwardRef(Paper)) (created by ForwardRef(Card))
    in ForwardRef(Card) (created by WithStyles(ForwardRef(Card)))
    in WithStyles(ForwardRef(Card)) (created by EditView)
    in div (created by EditView)
    in div (created by EditView)
    in EditView (created by Edit)
    in Edit (at user.edit.tsx:6)
    in UserEdit (created by WithPermissions)
    in WithPermissions (created by Context.Consumer)
    in Route (created by ResourceRoutes)
    in Switch (created by ResourceRoutes)
    in ResourceRoutes (created by Resource)
    in Resource (at App.tsx:31)
    in Route (created by RoutesWithLayout)
    in Switch (created by RoutesWithLayout)
    in RoutesWithLayout (created by Context.Consumer)
    in div (created by Layout)
    in main (created by Layout)
    in div (created by Layout)
    in div (created by Layout)
    in Layout (created by WithStyles(Layout))
    in WithStyles(Layout) (created by Context.Consumer)
    in withRouter(WithStyles(Layout)) (created by ConnectFunction)
    in ConnectFunction (created by LayoutWithTheme)
    in ThemeProvider (created by LayoutWithTheme)
    in LayoutWithTheme (at Layout.tsx:16)
    in Unknown (created by Context.Consumer)
    in Route (created by CoreAdminRouter)
    in Switch (created by CoreAdminRouter)
    in div (created by CoreAdminRouter)
    in CoreAdminRouter (created by Context.Consumer)
    in Route (created by CoreAdminUI)
    in Switch (created by CoreAdminUI)
    in CoreAdminUI (created by AdminUI)
    in AdminUI (created by Admin)
    in Router (created by ConnectedRouter)
    in ConnectedRouter (created by Context.Consumer)
    in ConnectedRouterWithContext (created by ConnectFunction)
    in ConnectFunction (created by CoreAdminContext)
    in TranslationProvider (created by CoreAdminContext)
    in Provider (created by CoreAdminContext)
    in CoreAdminContext (created by AdminContext)
    in AdminContext (created by Admin)
    in Admin (at App.tsx:17)
    in App (at src/index.tsx:9)
    in StrictMode (at src/index.tsx:8)

This happens whenever I click on a select input in the style of below...

<ReferenceInput source="companyId" reference="company">
				<SelectInput optionText="name" />
			</ReferenceInput>

[alextaymx]

I'm still having this warning:

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode. Instead, add a ref directly to the element you want to reference. Learn more about using refs safely here: https://reactjs.org/link/strict-mode-find-node
at div
at Paper (http://localhost:3000/static/js/0.chunk.js:29516:23)
at WithStyles(ForwardRef(Paper)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at Transition (http://localhost:3000/static/js/0.chunk.js:215420:30)
at Grow (http://localhost:3000/static/js/0.chunk.js:22257:24)
at Unstable_TrapFocus (http://localhost:3000/static/js/0.chunk.js:41695:24)
at div
at Portal (http://localhost:3000/static/js/0.chunk.js:30602:24)
at Modal (http://localhost:3000/static/js/0.chunk.js:27754:83)
at Popover (http://localhost:3000/static/js/0.chunk.js:29729:22)
at WithStyles(ForwardRef(Popover)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at Menu (http://localhost:3000/static/js/0.chunk.js:26691:32)
at WithStyles(ForwardRef(Menu)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at div
at RegionMenu (http://localhost:3000/static/js/main.chunk.js:3355:84)
at div
at Toolbar (http://localhost:3000/static/js/0.chunk.js:40589:23)
at WithStyles(ForwardRef(Toolbar)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at header
at Paper (http://localhost:3000/static/js/0.chunk.js:29516:23)
at WithStyles(ForwardRef(Paper)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at AppBar (http://localhost:3000/static/js/0.chunk.js:11024:23)
at WithStyles(ForwardRef(AppBar)) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at Transition (http://localhost:3000/static/js/0.chunk.js:215420:30)
at Slide (http://localhost:3000/static/js/0.chunk.js:32428:24)
at HideOnScroll (http://localhost:3000/static/js/0.chunk.js:170220:24)
at AppBar (http://localhost:3000/static/js/0.chunk.js:169494:24)
at CustomAppBar (http://localhost:3000/static/js/main.chunk.js:3518:19)
at div
at div
at LayoutWithoutTheme (http://localhost:3000/static/js/0.chunk.js:170379:24)
at WithStyles(LayoutWithoutTheme) (http://localhost:3000/static/js/0.chunk.js:50570:31)
at withRouter(WithStyles(LayoutWithoutTheme)) (http://localhost:3000/static/js/0.chunk.js:214329:37)
at Connect(withRouter(WithStyles(LayoutWithoutTheme))) (http://localhost:3000/static/js/0.chunk.js:211230:75)
at ThemeProvider (http://localhost:3000/static/js/0.chunk.js:49274:24)
at Layout (http://localhost:3000/static/js/0.chunk.js:170496:26)
at MyLayout (http://localhost:3000/static/js/main.chunk.js:3691:80)
at Route (http://localhost:3000/static/js/0.chunk.js:214072:29)
at Switch (http://localhost:3000/static/js/0.chunk.js:214274:29)
at div
at CoreAdminRouter (http://localhost:3000/static/js/0.chunk.js:138254:87)
at Route (http://localhost:3000/static/js/0.chunk.js:214072:29)
at Switch (http://localhost:3000/static/js/0.chunk.js:214274:29)
at CoreAdminUI (http://localhost:3000/static/js/0.chunk.js:138459:15)
at AdminUI
at Router (http://localhost:3000/static/js/0.chunk.js:213707:30)
at ConnectedRouter (http://localhost:3000/static/js/0.chunk.js:75959:7)
at ConnectedRouterWithContext (http://localhost:3000/static/js/0.chunk.js:76064:25)
at Connect(ConnectedRouterWithContext) (http://localhost:3000/static/js/0.chunk.js:211230:75)
at TranslationProvider (http://localhost:3000/static/js/0.chunk.js:145382:28)
at Provider (http://localhost:3000/static/js/0.chunk.js:210943:20)
at CoreAdminContext (http://localhost:3000/static/js/0.chunk.js:138023:25)
at AdminContext
at Admin (http://localhost:3000/static/js/0.chunk.js:176761:22)
at ApolloProvider (http://localhost:3000/static/js/0.chunk.js:6197:19)
at App (http://localhost:3000/static/js/main.chunk.js:183:97)

[n-sviridenko]

Same for me