Warning: findDOMNode is deprecated in StrictMode

[tbharathchandra]

Bug Report

I'm receiving a warning message like below when I'm using DropzoneDialogBase.
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.

Steps to reproduce

• I'm passing almost the same props which are shown in this example https://yuvaleros.github.io/material-ui-dropzone/#!/DropzoneDialog from the documentation. The only changes I made is to make onDelete to delete respective fileobject, and place a other method from parent component in onClose and onSave which takes fileObjects as argument.

• I receive this warning message when I click on the button to open the dialog box

Screenshot

Versions

• OS: windows 10
• Browser: firefox, chrome
• @material-ui/core version: 4.11.0
• material-ui-dropzone version: 3.4.0

[panz3r]

Hi @tbharathchandra ,

Thanks for your feedback, unfortunately this warning comes directly from the Material-UI components used to render the Dialog.

For more information about the issue see material-ui #13394 and material-ui #13221.

[AmrAhmedA]

you can remove the <React.StrictMode> in your index.js and replace it with normal

.