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@mui/styles (LEGACY)

The legacy styling solution for Material UI, now deprecated and not recommended for use.

Installation

To install and save in your package.json dependencies, run:

npm install @mui/styles@next

Getting started

There are 3 possible APIs you can use to generate and apply styles, however they all share the same underlying logic.

Hook API

import * as React from 'react';
import { makeStyles } from '@mui/styles';
import Button from '@mui/material/Button';

const useStyles = makeStyles({
  root: {
    background: 'linear-gradient(45deg, #FE6B8B 30%, #FF8E53 90%)',
    border: 0,
    borderRadius: 3,
    boxShadow: '0 3px 5px 2px rgba(255, 105, 135, .3)',
    color: 'white',
    height: 48,
    padding: '0 30px',
  },
});

export default function Hook() {
  const classes = useStyles();
  return <Button className={classes.root}>Hook</Button>;
}
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Styled components API

Note: this only applies to the calling syntax – style definitions still use a JSS object. You can also change this behavior, with some limitations.

import * as React from 'react';
import { styled } from '@mui/styles';
import Button from '@mui/material/Button';

const MyButton = styled(Button)({
  background: 'linear-gradient(45deg, #FE6B8B 30%, #FF8E53 90%)',
  border: 0,
  borderRadius: 3,
  boxShadow: '0 3px 5px 2px rgba(255, 105, 135, .3)',
  color: 'white',
  height: 48,
  padding: '0 30px',
});

export default function StyledComponents() {
  return <MyButton>Styled Components</MyButton>;
}
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Higher-order component API

import * as React from 'react';
import PropTypes from 'prop-types';
import { withStyles } from '@mui/styles';
import Button from '@mui/material/Button';

const styles = {
  root: {
    background: 'linear-gradient(45deg, #FE6B8B 30%, #FF8E53 90%)',
    border: 0,
    borderRadius: 3,
    boxShadow: '0 3px 5px 2px rgba(255, 105, 135, .3)',
    color: 'white',
    height: 48,
    padding: '0 30px',
  },
};

function HigherOrderComponent(props) {
  const { classes } = props;
  return <Button className={classes.root}>Higher-order component</Button>;
}

HigherOrderComponent.propTypes = {
  classes: PropTypes.object.isRequired,
};

export default withStyles(styles)(HigherOrderComponent);

Nesting selectors

You can nest selectors to target elements inside the current class or component. The following example uses the Hook API, but it works the same way with the other APIs.

const useStyles = makeStyles({
  root: {
    color: 'red',
    '& p': {
      color: 'green',
      '& span': {
        color: 'blue',
      },
    },
  },
});
This is red since it is inside the root.

This is green since it is inside the paragraph and this is blue since it is inside the span

Adapting based on props

You can pass a function to makeStyles ("interpolation") in order to adapt the generated value based on the component's props. The function can be provided at the style rule level, or at the CSS property level:

const useStyles = makeStyles({
  // style rule
  foo: (props) => ({
    backgroundColor: props.backgroundColor,
  }),
  bar: {
    // CSS property
    color: (props) => props.color,
  },
});

function MyComponent() {
  // Simulated props for the purpose of the example
  const props = {
    backgroundColor: 'black',
    color: 'white',
  };
  // Pass the props as the first argument of useStyles()
  const classes = useStyles(props);

  return <div className={`${classes.foo} ${classes.bar}`} />;
}

This button component has a color prop that changes its color:

Adapting the hook API

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Adapting the styled components API

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Adapting the higher-order component API

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Stress test

In the following stress test, you can update the theme color and the background-color property live:

const useStyles = makeStyles((theme) => ({
  root: (props) => ({
    backgroundColor: props.backgroundColor,
    color: theme.color,
  }),
}));
rendered 1 times
color: #ffffff
backgroundColor: #2196f3

Using the theme context

Starting from v5, Material UI no longer uses JSS as its default styling solution. If you still want to use the utilities exported by @mui/styles and they depend on the theme, you will need to provide the theme as part of the context. For this, you can use the ThemeProvider component available in @mui/styles, or, if you are already using @mui/material, you should use the one exported from @mui/material/styles so that the same theme is available for components from '@mui/material'.

import { makeStyles } from '@mui/styles';
import { createTheme, ThemeProvider } from '@mui/material/styles';

const theme = createTheme();

const useStyles = makeStyles((theme) => ({
  root: {
    color: theme.palette.primary.main,
  }
}));

const App = (props) => {
  const classes = useStyles();
  return <ThemeProvider theme={theme}><div {...props} className={classes.root}></ThemeProvider>;
}