PrivateRoute.js

import React from 'react';
import { Redirect, Route } from 'react-router-dom';

type Props = {
  authed: boolean,
  component: React.Component,
};

class PrivateRoute extends React.Component<void, Props, void> {
  state = {};

  render() {
    const { component: Component, authed, ...rest } = this.props;
    return (
      <Route
        {...rest}
        render={props =>
          (authed === true ? (
            <Component {...props} />
          ) : (
            <Redirect
              to={{
                pathname: '/login',
                state: { from: props.location },
              }}
            />
          ))
        }
      />
    );
  }
}

PrivateRoute.defaultProps = {
  location: {
    state: {},
  },
};

export default PrivateRoute;