mergeProps reduxExample.js

const mapStateToProps = ({ account }) => {
  return {
    accountId: account.accountId,
    email: account.email,
    name: `${account.firstName} ${account.lastName}`,
  };
};

const mapDispatchToProps = dispatch => ({
  loadAccount: bindActionCreators(actions.account.fetchAccount, dispatch),
});

const mergeProps = (stateProps, dispatchProps, ownProps) => {
  return {
    ...stateProps,
    ...dispatchProps,
//     ...ownProps
  }
}

export default connect(mapStateToProps, mapDispatchToProps, mergeProps)(PresentationComponent));