Styling API

The architecture defined in the components is based on the data-attributes pattern. This allows you to style the components using the data-attributes in your CSS.

Make sure you understand data-attributes before continuing.

Data Attributes

Every component has its unique data-attribute for styling. It follows the pattern data-sl-{component-name}, where sl stands for Shoreline.

import { Flex } from '@vtex/shoreline'
import '@vtex/shoreline/css'
 
export default function App() {
  return (
    <Flex>Flex container</Flex>
  )
}

In the component implementation it looks something like this:

export function Flex(props) {
  const { children, ...restProps } = props
  return (
    <div data-sl-flex {restProps}>{children}</div>
  )
}

Variants

The components often have variants which are also represented by data-attributes. For example, the Button component has the size variant. It can be used like this:

import { Button } from '@vtex/shoreline'
import '@vtex/shoreline-theme-sunrise/css'
 
export default function App() {
  return (
    <Button size="large">Button</Button>
  )
}

In the component implementation it looks something like this:

export function Button(props) {
  const { children, size, ...restProps } = props
 
  return (
    <button data-sl-button data-size={size} {...restProps}>{children}</button>
  )
}

If necessary to override or apply style to this variant, you can do it like this:

[data-sl-button] {
  &[data-size="large"] {
    /* Apply the styles here */
  }
}

Local variables

Sometimes you need to apply a style that is not a variant, but a dynamic value. You can do it by using local variables. For example, the Stack component has the space prop which can receive a token value and any space unit value. To handle this scenario we implement a local variable called --sl-stack-space and use it to apply the desired space between the children of the component.

export function Stack(props) {
  const { children, space, ...restProps } = props
 
  return (
    <div data-sl-stack style={{ '--sl-stack-space': space }} {...restProps}>{children}</div>
  )
}

Introduction Design Tokens