createStyles

All Mantine components are built with emotion based css-in-js library. We recommend using createStyles to create styles for the rest of your application as it provides the most convenient way to utilize Mantine theme, but it is not required – you can use any other styling tools and languages.

Usage

createStyles demo

import { createStyles, getStylesRef, rem } from '@asuikit/core';

const useStyles = createStyles((theme) => ({
  wrapper: {
    // subscribe to color scheme changes right in your styles
    backgroundColor: theme.colorScheme === 'dark' ? theme.colors.dark[5] : theme.colors.gray[1],
    maxWidth: rem(400),
    width: '100%',
    height: rem(180),
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    marginLeft: 'auto',
    marginRight: 'auto',
    borderRadius: theme.radius.sm,

    // Dynamic media queries, define breakpoints in theme, use anywhere
    [theme.fn.smallerThan('sm')]: {
      // Child reference in nested selectors via ref
      [`& .${getStylesRef('child')}`]: {
        fontSize: theme.fontSizes.xs,
      },
    },
  },

  child: {
    // assign ref to element
    ref: getStylesRef('child'),
    backgroundColor: theme.colorScheme === 'dark' ? theme.colors.dark[8] : theme.white,
    padding: theme.spacing.md,
    borderRadius: theme.radius.sm,
    boxShadow: theme.shadows.md,
    color: theme.colorScheme === 'dark' ? theme.white : theme.black,
  },
}));

function Demo() {
  const { classes } = useStyles();

  return (
    <div className={classes.wrapper}>
      <div className={classes.child}>createStyles demo</div>
    </div>
  );
}

Pseudo-classes

You can add pseudo-classes the same way as in any css-preprocessor like Sass:

import { createStyles } from '@asuikit/core';

const useStyles = createStyles((theme) => ({
  button: {
    color: theme.white,
    backgroundColor: theme.colors.blue[6],
    border: 0,
    borderRadius: theme.radius.md,
    padding: `${theme.spacing.sm} ${theme.spacing.lg}`,
    cursor: 'pointer',
    margin: theme.spacing.md,

    // Use pseudo-classes just like you would in Sass
    '&:hover': {
      backgroundColor: theme.colors.blue[9],
    },

    '&:not(:first-of-type)': {
      backgroundColor: theme.colors.purple[6],

      // pseudo-classes can be nested
      '&:hover': {
        backgroundColor: theme.colors.purple[9],
      },
    },
  },
}));

function Demo() {
  const { classes } = useStyles();
  return (
    <div>
      <button type="button" className={classes.button}>
        First
      </button>
      <button type="button" className={classes.button}>
        Second
      </button>
      <button type="button" className={classes.button}>
        Third
      </button>
    </div>
  );
}

Styles parameters

You can receive any amount of parameters as second argument of createStyles function, latter you will need to pass those parameters as argument to useStyles hook:

import { createStyles } from '@asuikit/core';

interface ButtonProps {
  color: 'blue' | 'purple';
  radius: number;
}

const useStyles = createStyles((theme, { color, radius }: ButtonProps) => ({
  button: {
    color: theme.white,
    backgroundColor: theme.colors[color][6],
    borderRadius: radius,
    padding: theme.spacing.md,
    margin: theme.spacing.md,
    border: 0,
    cursor: 'pointer',
  },
}));

function Button({ color, radius }: ButtonProps) {
  const { classes } = useStyles({ color, radius });
  return (
    <button type="button" className={classes.button}>
      {color} button with {radius} radius
    </button>
  );
}

function Demo() {
  return (
    <>
      <Button color="blue" radius={5} />
      <Button color="purple" radius={50} />
    </>
  );
}

Composition and nested selectors

Since createStyles produces scoped class names you will need to create a reference to selector in order to get static selector. Use getStylesRef function to assign static selectors:

import { createStyles, getStylesRef } from '@asuikit/core';

const useStyles = createStyles((theme) => ({
  button: {
    // assign reference to selector
    ref: getStylesRef('button'),

    // and add any other properties
    backgroundColor: theme.colors.blue[6],
    color: theme.white,
    padding: `${theme.spacing.sm} ${theme.spacing.lg}`,
    borderRadius: theme.radius.md,
    cursor: 'pointer',
    border: 0,
  },

  container: {
    display: 'flex',
    justifyContent: 'center',
    backgroundColor: theme.colorScheme === 'dark' ? theme.colors.dark[8] : theme.colors.gray[1],
    padding: theme.spacing.xl,

    // reference button with nested selector
    [`&:hover .${getStylesRef('button')}`]: {
      backgroundColor: theme.colors.purple[6],
    },
  },
}));

function Demo() {
  const { classes } = useStyles();
  return (
    <div className={classes.container}>
      <button className={classes.button} type="button">
        Hover container to change button color
      </button>
    </div>
  );
}

Classes merging (cx function)

To merge class names use cx function, it has the same api as clsx package.

!important: Do not use external libraries like classnames or clsx with class names created with createStyles function as it will produce styles collisions.

import { useState } from 'react';
import { createStyles } from '@asuikit/core';

const useStyles = createStyles((theme) => ({
  button: {
    backgroundColor: theme.colorScheme === 'dark' ? theme.colors.dark[5] : theme.colors.gray[1],
    border: 0,
    color: theme.colorScheme === 'dark' ? theme.white : theme.black,
    borderRadius: theme.radius.md,
    padding: `${theme.spacing.sm} ${theme.spacing.lg}`,
    cursor: 'pointer',
    margin: theme.spacing.md,
  },

  active: {
    backgroundColor: theme.colors[theme.primaryColor][6],
    color: theme.white,
  },
}));

function Demo() {
  const [active, setActive] = useState(0);
  const { classes, cx } = useStyles();

  return (
    <div>
      <button
        className={cx(classes.button, { [classes.active]: active === 0 })}
        onClick={() => setActive(0)}
        type="button"
      >
        First
      </button>
      <button
        className={cx(classes.button, { [classes.active]: active === 1 })}
        onClick={() => setActive(1)}
        type="button"
      >
        Second
      </button>
    </div>
  );
}

Media queries

You can use nested media queries like in Sass. Within query body you can use theme.breakpoints defined with MantineProvider or just static values:

import { createStyles, getBreakpointValue, rem, em } from '@asuikit/core';

const useStyles = createStyles((theme) => ({
  container: {
    height: rem(100),
    backgroundColor: theme.colors.blue[6],

    // Media query with value from theme
    [`@media (max-width: ${em(getBreakpointValue(theme.breakpoints.xl) - 1)})`]: {
      backgroundColor: theme.colors.pink[6],
    },

    // Simplify media query writing with theme functions
    [theme.fn.smallerThan('lg')]: {
      backgroundColor: theme.colors.yellow[6],
    },

    // Static media query
    [`@media (max-width: ${em(800)})`]: {
      backgroundColor: theme.colors.orange[6],
    },
  },
}));

function Demo() {
  const { classes } = useStyles();
  return <div className={classes.container} />;
}

Keyframes

Keyframes demo

import { createStyles, keyframes } from '@asuikit/core';

// Export animation to reuse it in other components
export const bounce = keyframes({
  'from, 20%, 53%, 80%, to': { transform: 'translate3d(0, 0, 0)' },
  '40%, 43%': { transform: 'translate3d(0, -1.875rem, 0)' },
  '70%': { transform: 'translate3d(0, -0.9375rem, 0)' },
  '90%': { transform: 'translate3d(0, -0.25rem, 0)' },
});

const useStyles = createStyles((theme) => ({
  container: {
    textAlign: 'center',
    padding: theme.spacing.xl,
    animation: `${bounce} 3s ease-in-out infinite`,
  },
}));

function Demo() {
  const { classes } = useStyles();
  return <div className={classes.container}>Keyframes demo</div>;
}

Go back

sx prop – Styles

Up next

Global styles – Styles

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