我似乎无法正确获取Webpack的React外部配置
当作为从node_modules捆绑的供应商导入react时,该应用程序可以正常运行 . 但是,当我删除供应商捆绑并尝试使用CDN的响应时,我收到以下错误 .
警告:React.createElement:type无效 - 期望一个字符串(对于内置组件)或一个类/函数(对于复合组件)但得到:undefined . 您可能忘记从其定义的文件中导出组件.printWarning @ react.js:3640 warning @ react.js:3664 createElement @ react.js:2357 module.exports @ app.js:122 webpack_require @ app.js: 20(匿名)@ app.js:429 webpack_require @ app.js:20 module.exports @ app.js:66(匿名)@ app.js:69
完整代码https://github.com/ericnoguchi/react-testing
这是我的webpack配置
let LiveReloadPlugin = require('webpack-livereload-plugin');
let ExtractTextPlugin = require("extract-text-webpack-plugin");
let webpack = require('webpack');
module.exports = {
entry: {
'app': './@Client.js',
// 'vendor': [
// "react",
// "react-dom",
// "react-router"
// ],
},
output: {
path: __dirname + '/_dist',
publicPath: '/',
filename: "[name].js"
},
externals: {
"react": 'React',
"react-dom": 'ReactDOM',
"react-router": 'ReactRouter'
},
devServer: {
contentBase: '_dist'
},
module: {
loaders: [
{
test: /\.scss$/,
loader: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'sass-loader']
})
},
{
test: /\.jsx?$/,
exclude: /(node_modules|bower_components)/,
loader: 'babel-loader',
query: {
presets: [
"react",
"es2015",
"stage-2"
]
}
}
]
},
plugins: [
new webpack.DefinePlugin({
"process.env": {
BROWSER: JSON.stringify(true)
}
}),
// new webpack.optimize.CommonsChunkPlugin({
// name: 'vendor',
// filename: 'vendor.js',
// minChunks: Infinity
// }),
new ExtractTextPlugin("css/[name].css"),
new LiveReloadPlugin()
]
};
还有布局组件
import React, { Component } from 'react';
import { Link } from 'react-router'
// http://stackoverflow.com/questions/30347722/importing-css-files-in-isomorphic-react-components
if (process.env.BROWSER) {
require('./layout.scss');
console.log('lalala')
}
export class Layout extends Component {
handleClick() {
alert(0);
}
render() {
let {custom, children} = this.props;
return (
<html>
<head>
<title>{custom.title}</title>
<link rel="stylesheet" type="text/css" href="css/app.css" />
</head>
<body>
<h1>{custom.title}</h1>
<button onClick={this.handleClick}>Click me</button>
{children}
<ul>
<li>
<Link to="/">Index</Link>
</li>
<li>
<Link to="/about">About</Link>
</li>
<li>
<Link to="/foo">404</Link>
</li>
</ul>
<script dangerouslySetInnerHTML={{
__html: 'window.PROPS=' + JSON.stringify(custom)
}}></script>
{/*<script src="vendor.js"></script>*/}
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react.js" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react-dom.js" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-router/3.0.2/react-router.js" />
<script src="app.js" />
</body>
</html>
);
}
}
客户端APP
import ReactDOM from 'react-dom';
import routes from './routes/routes.jsx'
ReactDOM.render(routes, document);
1 回答
从你粘贴的错误来看,React工作正常 . 你的问题出在其他地方 .
但是代码中存在多个缺陷 . 首先,从React生成完整页面并不常见,我在
render
方法中看到了html
,head
和body
标签 .其次,如果您正在加载React CDN脚本 from React,那该怎么办呢? :)它's a miracle you'得到了那个错误 .
拥有一个带有基本HTML骨架的index.html . 如果您正在进行服务器端渲染,请使用简单模板执行相同操作,并将React的服务器端呈现嵌入
<div id="app"></div>
占位符中 .