import * as React from 'react'; // React currently throws a warning when using useLayoutEffect on the server. // To get around it, we can conditionally useEffect on the server (no-op) and // useLayoutEffect in the browser. We need useLayoutEffect to ensure the store // subscription callback always has the selector from the latest render commit // available, otherwise a store update may happen between render and the effect, // which may cause missed updates; we also must ensure the store subscription // is created synchronously, otherwise a store update may occur before the // subscription is created and an inconsistent state may be observed // Matches logic in React's `shared/ExecutionEnvironment` file export const canUseDOM = !!(typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined'); export const useIsomorphicLayoutEffect = canUseDOM ? React.useLayoutEffect : React.useEffect;