What's the point of bindActionCreators?

Question

JavaScript

After reading the documentation, I did not understand the sacred meaning of this function.
Why write like this?

function mapDispatchToProps(dispatch) {
  return bindActionCreators({ selectBook: selectBook }, dispatch);
}
export default connect(mapStateToProps, mapDispatchToProps)(BookList);

If code like this works fine too:

let mapDispatchToProps = {selectBook};
export default connect(mapStateToProps, mapDispatchToProps)(BookList);

Answer 1

bindActionCreators is in the redux module , while shorthand mapDispatchToProps is in the react-redux module .