我试图在组件中添加一些动画样式,并努力找出出错的地方。这是一个带有connect()和CSSTransitionGroup的简单组件(DOM中其他地方的不同组件最终将用于触发打开我的灯箱组件,Redux将用于在它们之间共享状态,以防你想知道为什么它'要求):
LightboxPresentation.js:
import React, { Component } from 'react';
import { CSSTransitionGroup } from 'react-transition-group';
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';
import * as actionCreators from '../actions/actionCreators';
class LightboxPresentation extends Component {
render() {
return (
<div>
<CSSTransitionGroup
transitionName="lightbox"
transitionEnterTimeout={500}
transitionLeaveTimeout={500}>
{this.renderPage()}
</CSSTransitionGroup>
</div>
)
}
renderPage() {
return (
<div key={'lightbox-module'}>Some test HTML</div>
);
}
}
const mapStateToProps = (state) => {
return {
showLightbox: state.showLightbox,
itemsShowLightbox: state.itemsShowLightbox,
};
};
const mapDispatchToProps = (dispatch) => {
return bindActionCreators(actionCreators, dispatch);
};
export default connect(mapStateToProps, mapDispatchToProps)(LightboxPresentation);
这是调用上述组件的代码:
App.js:
import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'react-redux';
import configureStore from './store/configureStore';
import ItemList from './components/ItemList';
import LightboxPresentation from './components/LightboxPresentation';
const initialState = { itemFilter: 'featured' }
const store = configureStore(initialState);
render(
<Provider store={store}>
<LightboxPresentation />
</Provider>,
document.getElementById('lightbox')
);
但是我的控制台出现以下错误:
Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in. Check the render method of `LightboxPresentation`.
in LightboxPresentation
in Connect(LightboxPresentation)
in Provider
如果我从我的renderPage调用周围删除该块,则renderPage的输出呈现而没有错误。它只会添加转换块导致错误。据我所知,import {CSSTransitionGroup}是正确的,它是如何在documentatio n中完成的(虽然我确实没有花括号但仍然没有运气)。
我做错了吗?我花了一些时间尝试不同的事情和谷歌搜索,但到目前为止一切都没有喜悦。
答案 0 :(得分:2)
您使用的是反应过渡组的版本2+吗?版本2之后没有CSSTransitionGroup。如果您希望代码按照原样运行,请尝试通过npm install --save react-transition-group@1.2.0
进行还原。
如果您想使用新版本,请尝试使用These Docs中的新API。