Encountering an error: Unable to access property 'main' as it is undefined in MUI v5

I encountered an issue while trying to implement page pagination for my Table following a tutorial. The error message I see in my browser is:

   Uncaught TypeError: Cannot read property 'main' of undefined
    at ButtonRoot.ownerState.ownerState (Button.js:80)
    at transformedStyleArg (createStyled.js:189)
    at handleInterpolation (emotion-serialize.browser.esm.js:137)
    at serializeStyles (emotion-serialize.browser.esm.js:262)
    at emotion-styled-base.browser.esm.js:131
    at emotion-element-cbed451f.browser.esm.js:36
    at renderWithHooks (react-dom.development.js:14985)
    at updateForwardRef (react-dom.development.js:17044)
    at beginWork (react-dom.development.js:19098)
    at HTMLUnknownElement.callCallback (react-dom.development.js:3945)

This error is preventing me from displaying the page properly even though I have tried to handle style changes from mui v4 to mui v5 using simple CSS. The issue seems to be related to a "ButtonRoot." Here's the specific line causing the error:

backgroundColor: alpha(theme.palette[ownerState.color].main, theme.palette.action.hoverOpacity),

Below is the code snippet where I am utilizing a "theme" (similar to what was shown in the tutorial):

import { useTheme } from '@mui/material';

import LastPageOutlinedIcon from "@mui/icons-material/LastPageOutlined";
import FirstPageIcon from "@mui/icons-material/FirstPage";
import KeyboardArrowLeftIcon from "@mui/icons-material/KeyboardArrowLeft";
import KeyboardArrowRightIcon from "@mui/icons-material/KeyboardArrowRight";

// Rest of the code...

Note: This excerpt represents only a portion of my code which may help identify the problem related to the "theme" style.

For reference, here is the link to the tutorial code I based my implementation on: https://codesandbox.io/s/ccw8hm?file=/demo.js

javascriptcssreactjsmaterial-ui

Answer №1

If you're encountering the same issue I did, it might be related to passing custom colors to the Button or IconButton component. The error message you're seeing could be identical to what I experienced.

Check out this link for more information on the issue

Basically, the problem arises from certain components no longer supporting the 'default' color that was present in version 4 of Material-UI. In version 5, they have discontinued the 'default' grey color to align with the material design guidelines. This change has caused quite a headache for me personally because I heavily relied on these default grey buttons and components for creating dark/light themes.

You'll need to review your code and make sure there are no instances of 

<Button color="default"/>
. If there are, update the color to one that is supported according to the documentation, like primary or secondary, for instance. Some components like AppBar, Fab, and IconButton still support 'default', but not Button.

As a temporary solution, you can modify your custom MUI theme to include a default color. However, this may result in an unconventional appearance since it doesn't cover all the variations present in version 4 (Here's a discussion on replicating the color fully).

import { createTheme } from '@mui/material/styles';
import { grey } from "@mui/material/colors";

export const lightTheme = createTheme({
  palette: {
    mode: 'light',
    default: {
      main: grey[300],
      dark: grey[400]
    },
  }
});

Answer №2

click here Material UI themes cannot be customized by simply declaring them in your code. You must create styled components for each element you want to customize by importing styled from MUI. Instead of using style={{}}, opt for sx={{}} for better consistency.

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