material-ui Drawer - findDOMNode is deprecated in StrictMode

Question

I have a simple ReactJS app based on hooks (no classes) using StrictMode.

I am using React version 16.13.1 and Material-UI version 4.9.10.

In the Appbar I a

Answer 1

Have you tried using React.forwardRef? [MUI docs] [React docs]

const PersistentDrawer = React.forwardRef(
  (props, ref) => (
    
  )
)

return (
  

    
      
        
          
        
        
          Online Information
        
      
    
    
  
)