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mapdispatchtoprops

const mapDispatchToProps = (dispatch) => {
  return {
    // dispatching plain actions
    increment: () => dispatch({ type: 'INCREMENT' }),
    decrement: () => dispatch({ type: 'DECREMENT' }),
    reset: () => dispatch({ type: 'RESET' }),
  }
}

⭐ Note: We recommend using the object form of 
mapDispatchToProps unless you specifically 
need to customize dispatching behavior in some way.

mapdispatchtoprops

function mapDispatchToProps(dispatch){
return{submitNewMessage: function(add){
    dispatch(addMessage(add))}
  }
}

mapdispatchtoprops

render() {
  return <button onClick={() => this.props.toggleTodo(this.props.todoId)} />
}

const mapDispatchToProps = dispatch => {
  return {
    toggleTodo: todoId => dispatch(toggleTodo(todoId))
  }
}

mapDispatchToProps

const mapDispatchToProps = (dispatch) => {
  return {
    onTodoClick: (id) => {
      dispatch(toggleTodo(id))
    }
  }
}