Encountering an issue with MUI 5 where it is unable to access properties of undefined when utilizing makestyles

I recently finished building a react app using MUI-5 and everything was running smoothly. However, I've encountered a strange issue where my app refuses to start and I'm bombarded with multiple MUI errors. These errors started popping up after I deleted the yarn.lock file and re-added all the packages from scratch. Despite trying various solutions, nothing seems to be working.

Error:

MUI: The styles argument provided is invalid. You are providing a function without a theme in the context.

Uncaught TypeError: Cannot read properties of undefined (reading 'up')

package.json file:

    {
      "name": "doctor",
      "version": "0.1.0",
      ...
      ...
  }

app.tsx file;

import React from "react";
import { ThemeProvider } from "@material-ui/core/styles";
...
...
export default App;

theme config file:

import { createTheme } from "@material-ui/core/styles";
...
...
export default muiTheme;

Styles.tsx

import { Theme } from "@mui/system";
import { makeStyles } from "@mui/styles";
...
...

I've been struggling with this issue for a few days now and I can't seem to figure out what I'm doing wrong. I've ensured that my routes are wrapped with ThemeProvider, but the errors persist.

javascriptreactjstypescriptmaterial-ui

Answer №1

As outlined in the documentation:

Utilizing the theme context

Starting with version 5, MUI has transitioned away from JSS as its default styling solution. If you still wish to utilize utilities provided by @mui/styles that rely on the theme, you will need to include the theme within the context. This can be achieved using the ThemeProvider component found in @mui/styles. Alternatively, if you are already integrating @mui/material, ensure to use the version exported from @mui/material/styles to ensure consistency of the theme across components from '@mui/material'.

Therefore, your Styles.tsx file should resemble the following:

import { Theme } from "@mui/system";
import { makeStyles } from "@mui/styles";
import { createTheme } from '@mui/material/styles';
//import muiTheme from "./constants/...";

export const useStyles = makeStyles((muiTheme) => ({
  intro: {
    padding: "0 2rem",
    [theme.breakpoints.up("lg")]: {
      padding: "0 4rem !important",
    },
  },
}));

Take note:

⚠️ @mui/styles represents the legacy styling method for MUI, relying on JSS which is no longer utilized in @mui/material starting from v5 and is now deprecated.

Additionally,

⚠️ @mui/styles is not compatible with either React.StrictMode or React 18.

I highly recommend exploring more advanced solutions such as utilizing styled or the sx prop.

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