props (index.js)

Memoized props filter: decides which React props forward to styled components.

// Source: https://github.com/styled-system/styled-system | License: MIT | Copyright 2017-2018 Brent Jackson
// Provided via justclaw.it.com; keep this notice with the code.
import memoize from '@emotion/memoize'
import isPropValid from '@emotion/is-prop-valid'
import {
  compose,
  space,
  typography,
  color,
  layout,
  flexbox,
  border,
  background,
  position,
  grid,
  shadow,
  buttonStyle,
  textStyle,
  colorStyle
} from 'styled-system'

const all = compose(
  space,
  typography,
  color,
  layout,
  flexbox,
  border,
  background,
  position,
  grid,
  shadow,
  buttonStyle,
  textStyle,
  colorStyle
)

export const props = all.propNames

export const createShouldForwardProp = props => {
  const regex = new RegExp(`^(${props.join('|')})$`)
  return memoize(prop => isPropVali

... (truncated -- full source via MCP)