javascript - 您必须将组件传递给 connect 返回的函数。而是收到了 undefined

Question

下面的代码给出了

Uncaught Error: You must pass a component to the function returned by connect. Instead received undefined

List.js

import React from 'react';
import { connect, bindActionCreators } from 'react-redux';
import PostList from '../components/PostList'; // Component I wish to wrap with actions and state
import postList from '../Actions/PostList' //Action Creator defined by me

const mapStateToProps = (state, ownProps) => {
    return state.postsList
}

const mapDispatchToProps = (dispatch) => {
    return bindActionCreators({"postsList":postList},dispatch)
}

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

PostList.js

import React from 'react'

export const PostList = (props) => {
    return <div>List</div>
}

请帮我解决一下？

Answer 1

您正在执行 import PostList from '../components/PostList'; 因此您需要在 PostList.js 文件中使用 export default。

否则你需要做 import { PostList } from '../components/PostList';。

对于感兴趣的人，这里有一篇关于 es6 导入/导出语法的好文章:http://www.2ality.com/2014/09/es6-modules-final.html