您必须将一个组件传递给 connect 返回的函数.而是收到未定义 [英] You must pass a component to the function returned by connect. Instead received undefined

问题描述

下面的代码给出了

未捕获的错误:您必须将一个组件传递给 connect 返回的函数.而是收到未定义

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>
}

请帮我解决问题?

推荐答案

你正在做 import PostList from '../components/PostList'; 所以你需要使用 export default 在 PostList.js 文件中.

You are doing import PostList from '../components/PostList'; so you need to use export default in your PostList.js file.

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

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

To whoever is interested, here is a nice article about es6 import/export syntax: http://www.2ality.com/2014/09/es6-modules-final.html

这篇关于您必须将一个组件传递给 connect 返回的函数.而是收到未定义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！