react-sweet-state/lib/esm/defaults.js

Global + local state combining the best of Redux and Context API

import React from 'react';

const defaultMutator = (prevState, partialState) => {
  // Merge the partial state and the previous state.
  return Object.assign({}, prevState, partialState);
};

const defaults = {
  batchUpdates: 'useSyncExternalStore' in React,
  devtools: false,
  middlewares: new Set(),
  mutator: defaultMutator
};
export default defaults;