As described in the migration docs (v4 to v5) I've added this to my theme:
import { createTheme, Theme } from '@mui/material/styles'
import { grey } from '@mui/material/colors'
declare module '@mui/styles/defaultTheme' { // <-- ts error
// eslint-disable-next-line @typescript-eslint/no-empty-interface
interface DefaultTheme extends Theme {}
}
const { palette } = createTheme()
const { augmentColor } = palette
// Create a theme instance.
export const theme: Theme = createTheme({
palette: {
neutral: augmentColor({ color: { main: grey[400] } }),
}
})
But I get the ts error Invalid module name in augmentation, module '@mui/styles/defaultTheme' cannot be found.ts(2664)
What am I doing wrong?
I don't know why, but importing the module for side-effects fix it:
import { Theme } from "@mui/material/styles";
import "@mui/styles";
declare module "@mui/styles/defaultTheme" {
// eslint-disable-next-line @typescript-eslint/no-empty-interface (remove this line if you don't have the rule enabled)
interface DefaultTheme extends Theme {}
}