mapDispatchToProps与store.dispatch（）

Question

Is it more efficient to use mapDispatchToProps inside a component to call actions or is it more efficient to use store.dispatch inside action creators?

mapDispatchToProps example:

// Component

import React from 'React';
import { connect } from 'react-redux';
import { defaultAction } from './actions';

class MyComponent extends Component {
  onClickHandler() {
    this.props.dispatch(defaultAction());
  }

  render() {
    return (<div onClick={this.onClickHandler.bind(this)} />);
  }
}

function mapDispatchToProps(dispatch) {
  return { dispatch };
}

export default connect(mapDispatchToProps)(MyComponent);



// Actions

import { DEFAULT_ACTION } from './constants';

export function defaultAction() {
  return {
    type: DEFAULT_ACTION,
  };
}

store.dispatch() example:

// Component

import React from 'React';
import { connect } from 'react-redux';
import { defaultAction } from './actions';

class MyComponent extends Component {
  onClickHandler() {
    defaultAction();
  }

  render() {
    return (<div onClick={this.onClickHandler.bind(this)} />);
  }
}

export default MyComponent;


// Actions

import { DEFAULT_ACTION } from './constants';
import store from './store';

export function defaultAction() {
  store.dispatch({
    type: DEFAULT_ACTION,
  });
}

My guess is that it's more efficient to use mapDispatchToProps instead of importing the entire ./store to dispatch actions.

Answer 1

It is generally recommended to use dispatch as provided to you via mapDispatchToProps , and not to couple your action creator methods to your store singleton. Here's some in depth discussion about it.