styled-components/src/utils/hasInInheritanceChain.js

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

// @flow

export default function hasInInheritanceChain(child: any, parent: Function) {
  let target = child

  while (target) {
    target = Object.getPrototypeOf(target)

    if (target && target === parent) {
      return true
    }
  }

  return false
}