mui

MUI v7 Patterns

Purpose

Material-UI v7 (released March 2025) patterns for component usage, styling with sx prop, theme integration, and responsive design.

Note: MUI v7 breaking changes from v6:

• Deep imports no longer work - use package exports field
• onBackdropClick removed from Modal - use onClose instead
• All components now use standardized slots and slotProps pattern
• CSS layers support via enableCssLayer config (works with Tailwind v4)

When to Use This Skill

• Styling components with MUI sx prop
• Using MUI components (Box, Grid, Paper, Typography, etc.)
• Theme customization and usage
• Responsive design with MUI breakpoints
• MUI-specific utilities and hooks

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Quick Start

Basic MUI Component

import { Box, Typography, Button, Paper } from '@mui/material';
import type { SxProps, Theme } from '@mui/material';

const styles: Record<string, SxProps<Theme>> = {
  container: {
    p: 2,
    display: 'flex',
    flexDirection: 'column',
    gap: 2,
  },
  header: {
    mb: 3,
    fontSize: '1.5rem',
    fontWeight: 600,
  },
};

function MyComponent() {
  return (
    <Paper sx={styles.container}>
      <Typography sx={styles.header}>
        Title
      </Typography>
      <Button variant="contained">
        Action
      </Button>
    </Paper>
  );
}

---

Styling Patterns

Inline Styles (< 100 lines)

For components with simple styling, define styles at the top:

import type { SxProps, Theme } from '@mui/material';

const componentStyles: Record<string, SxProps<Theme>> = {
  container: {
    p: 2,
    display: 'flex',
    flexDirection: 'column',
  },
  header: {
    mb: 2,
    color: 'primary.main',
  },
  button: {
    mt: 'auto',
    alignSelf: 'flex-end',
  },
};

function Component() {
  return (
    <Box sx={componentStyles.container}>
      <Typography sx={componentStyles.header}>Header</Typography>
      <Button sx={componentStyles.button}>Action</Button>
    </Box>
  );
}