React-Redux: mapDispatchToProps methods not found

Question

It seems to me that the methods added to mapDispatchToProps should be accessible using this.props. When I call these methods, "Untrained TypeError: this.props.onHighlight is not a function." Does anyone know what is going on? I tried a bunch of different alternatives for mapDispatchToProps, but none of them work.

   import React from 'react';
    import { addHighlight, deleteHighlight, selectHighlight } from 'actions/highlight';
    import { connect } from 'react-redux';
    import jquery from 'jquery';
    import { styles } from './styles.scss';

    const mapDispatchToProps = dispatch => {
      return {
        onHighlight: (start, end, selectedText) => {
          dispatch(addHighlight(start, end, selectedText));
        },
        onDeleteHighlight: (source) => {
          dispatch(deleteHighlight(source));
        },
        onSelectHighlight: (source) => {
          dispatch(selectHighlight(source));
        }
      };
    }

    const mapStateToProps = state => {
      return { highlights: state.highlights,
               currentTopic: state.currentTopic,
               selectedHighlight: state.selectedHighlight,};
    }

    ...
    Other code about Highlight object 
    ...

    export default connect(
      mapStateToProps,
      mapDispatchToProps
    )(Highlight);

Answer 1

Try using bindActionCreators :

import { bindActionCreators } from 'redux'

const mapDispatchToProps = dispatch => {
      return bindActionCreators({
        onHighlight: addHighlight,
        onDeleteHighlight: deleteHighlight,
        onSelectHighlight: selectHighlight
      }, dispatch);
    }