Toggle.js

import React from "react";
import { connect, useSelector } from "react-redux";
import { toggleSwitch } from "./UiReducer";

const Toggle = ({ toggleSwitch }) => {
  const ui = useSelector(state => state.ui);
  return (
    <div>
      <div>{JSON.stringify(ui)}</div>
      <input type="checkbox" value={ui.toggle} onChange={toggleSwitch} />
    </div>
  );
};

export default connect(
  null,
  { toggleSwitch }
)(Toggle);