import { styled } from '@uhg-abyss/web/tools/styled';

Object syntax only

Write CSS using the object style syntax. The reasons for this are: performance, bundle size and developer experience (type checks and autocomplete suggestions for both properties and values).

const Button = styled('button', {
  color: 'red',
  fontSize: '14px',
  '&:hover': {
    color: 'black',
    fontSize: '14px',
  },
});

Chaining selectors

All chained selectors require the & sign.

const Button = styled('button', {
  // all chained
  '&:hover': {},
  '&::before': {},
  '&.class': {},
});

Prop interpolation vs. variants

You can conditionally apply variants at the consumption level, including at different breakpoints.

const Button = styled('button', {
  variants: {
    color: {
      violet: { backgroundColor: 'blueviolet' },
      gray: { backgroundColor: 'gainsboro' },
    },
  },
});

() => <Button color="violet">Button</Button>;

Tokens and themes

You can define tokens in the createTheme config file and seamlessly consume and access them directly in the Style Object.

See the Tokens documentation page for more information.

const Example = styled('div', {
  backgroundColor: '$core.color.brand.100',
  height: 100,
  width: 100,
});

Focus rings

You can use the focusRing property to add focus rings to your styled components.

const Example = styled('div', {
  '&:focus-visible': {
    focusRing: 'default',
  },
});

Available focus ring styles:

Option	Description
default	Standard focus for most interactive elements. Includes outline with border radius.
boundingBorder	Use when focus outline should align exactly with element borders.
activeImmediately	Use for buttons and clickable elements to show focus on mouse click.
inset	Use when focus should appear inside element boundaries (e.g., in tight layouts).
insetHighlight	Use for form inputs and controls requiring prominent inset focus indication.
none	Remove all focus styles

Modifiers:

• Add !alt to any style (e.g., focusRing: 'default !alt') to use the alternate focus color.
• You can override the focus color by passing a token (e.g., focusRing: 'default $core.color.brand.100').

Global styles

You can add global styles with the globalCss API.

import { globalCss } from '@uhg-abyss/web/tools/styled';

const globalStyles = globalCss({
  body: {
    margin: '0',
  },
});

export function App() => {
  globalStyles();
  return <div>Your app</div>
}

Animations

You can use the keyframes function to add animations

import { keyframes } from '@uhg-abyss/web/tools/styled';

const fadeIn = keyframes({
  '0%': { opacity: '0' },
  '100%': { opacity: '1' },
});

const Box = styled('div', {
  animationName: fadeIn,
});

Dynamic/static

When Emotion variants won't work and the CSS styling you need is variable, you can use the static and dynamic config in the styled tool. Place all of your static CSS along with variants, compoundVariants, and defaultVariants in the static config. The dynamic config accepts a function that returns any properties that are passed to the component. You can then use those props to handle dynamic styles like sizing and colors.

For the best results and performance, it is recommended to use variants whenever possible.

Media queries

The styled tool also supports media queries with Abyss's predefined breakpoints. You can use the ScreenQueries enum from the styled tool for convenience or provide your own custom strings.

import { ScreenQueries } from '@uhg-abyss/web/tools/styled';

This example uses the ScreenQueries enum:

This example uses the Abyss @screen string syntax:

This example uses custom media query strings: