Is there a mistake in the TypeScript guide for custom typography in MUI5?

Currently, I am in the process of setting up custom typography variants in MUI5 by referencing this helpful guide: https://mui.com/customization/typography/#adding-amp-disabling-variants. As I follow step 2 and input the type definitions:

declare module '@mui/material/styles' {
  interface TypographyVariants {
    poster: React.CSSProperties;
  }

  // allow configuration using `createTheme`
  interface TypographyVariantsOptions {
    poster?: React.CSSProperties;
  }
}

// Update the Typography's variant prop options
declare module '@mui/material/Typography' {
  interface TypographyPropsVariantOverrides {
    poster: true;
    h3: false;
  }
}

I save this code snippet into a file named typography.d.ts, making sure to replace the examples with my specific requirements. However, it appears that the entire module gets overwritten, causing errors like:

JSX element type 'Typography' does not have any construct or call signatures.

whenever attempting to utilize the Typography component, or

Module '"@mui/material/styles"' has no exported member 'createTheme'.

when trying to create a theme.

Do you have any insights on this issue?

Answer №1

After relocating the typings from a *.d.ts file to a regular *.ts file, the warnings disappeared completely.

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