styled-components/src/constants.js

Visual primitives for the component age. Use the best bits of ES6 and CSS to style your apps without stress 💅

// @flow

declare var __DEV__: ?string

export const SC_ATTR =
  (typeof process !== 'undefined' && process.env.SC_ATTR) ||
  'data-styled-components'
export const SC_STREAM_ATTR = 'data-styled-streamed'
export const CONTEXT_KEY = '__styled-components-stylesheet__'

export const IS_BROWSER =
  typeof window !== 'undefined' && 'HTMLElement' in window

export const DISABLE_SPEEDY =
  (typeof __DEV__ === 'boolean' && __DEV__) ||
  process.env.NODE_ENV !== 'production'