@mui/material/internal/react-transition-group.d.mts

Material UI is an open-source React component library that implements Google's Material Design. It's comprehensive and can be used in production out of the box.

declare module 'react-transition-group/TransitionGroupContext' {
  import * as React from 'react';
  interface TransitionGroupContextValue {
    isMounting: boolean;
  }
  const TransitionGroupContext: React.Context<TransitionGroupContextValue | null>;
  export default TransitionGroupContext;
}