Theme.breakpoints.down not being acknowledged by MUI breakpoints

The Challenge: Implement a hamburger menu to replace the navMenu on tablet and smaller screens

After successfully compiling in VS code terminal, encountering an error in the browser:

Error Message: TypeError: Cannot read properties of undefined (reading 'down')

Attempted solutions from this StackOverflow post, but unable to resolve the issue.

Seeking guidance on how to proceed in the right direction.

import AppBar from "@mui/material/AppBar";
import Box from "@mui/material/Box";
import Toolbar from "@mui/material/Toolbar";
import Typography from "@mui/material/Typography";
import Button from "@mui/material/Button";
import { makeStyles } from "@mui/styles";

const useStyles = makeStyles((theme) => ({
  navMenu: {
    [theme.breakpoints.down('md')]: {
      display: "none",
    },
  },
}));

const Navbar = () => {
  const classes = useStyles();

  return (
    <Box sx={{ flexGrow: 1 }}>
      <AppBar position="static" style={{ backgroundColor: "#061B2E" }}>
        <Toolbar>
          <Typography variant="h6" component="div" sx={{ flexGrow: 1 }}>
            Name
          </Typography>
          <Box className={classes.navMenu}>
            <Button color="inherit">Item 1</Button>
            <Button color="inherit">Item 2</Button>
            <Button color="inherit">Item 3</Button>
            <Button color="inherit">Item 4</Button>
          </Box>
        </Toolbar>
      </AppBar>
    </Box>
  );
};

export default Navbar;

Answer №1

Excellent inquiry! What version of MUI are you currently utilizing? It seems they are transitioning from utilizing makeSyles to favor styled components, but rest assured this method is still fully supported (my team continues to rely on it exclusively). You might need to update your import statement to

import { makeStyles } from '@material-ui/core';

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