mapStateToProps must return an object. Instead received Map {}?

Question

Hello i use Immuteble Map for state and when i try maspStateToProps i have this error.

Uncaught Invariant Violation: mapStateToProps must re

Answer 1

This github issue covers this exact problem: https://github.com/reactjs/react-redux/issues/60.

You can manually extract the values you want from your Map in your mapStateToProps function:

const mapStateToProps = (state) => {
  return {
       constraints: state.get('constraints'),
       selectedAmount: state.get('selectedAmount'),
       selectedTerm: state.get('selectedTerm'),
  };
}