模块构建失败 - Webpack,React,Babel

Question

模块构建失败 - Webpack,React,Babel

Erk*_*mir 9 javascript reactjs webpack babeljs ecmascript-7

我正在关注多视点的视频教程.课程名称是"使用React,Flux,Webpack和Firebase构建实时应用程序".

请参阅下面的代码和我所拥有的问题的附加屏幕截图.当我尝试重新构建文件时,Webpack失败了.有人可以告诉你这个问题是什么.我目前正在使用所有最新的库.

/*webpack.config.js*/

module.exports = {
entry: {
    main: [
        './src/main.js'
    ]
},
output: {
    filename: './public/[name].js'
},
module: {
    loaders: [
        {
            test: /\.jsx?$/,
            exclude: /node_modules/,
            loader: 'babel'
        }
    ]
}
}



  /*App.jsx*/
  import React from 'react';

 class App extends React.Component {
 constructor() {
    super();
    this.state = {
        messages: [
            'hi there how are you ?',
            'i am fine, how are you ?'
        ]
    }
}

render() {
    var messageNodes = this.state.messages.map((message)=> {
        return (
            <div>{message}</div>
        );
    });

    return (
        <div>{messageNodes}</div>
    );
 }
 }

 export default App;

/*main.js*/
import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/App.jsx';

ReactDOM.render(<App/>, getElementById('container'));

/*index.html*/
<!DOCTYPE html>
 <html>
  <head>
<title></title>
<meta charset="utf-8" />
</head>
<body>
<div id="container"></div>
<script src="public/main.js"></script>
</body>
</html>

/*package.json */

{
"name": "reatapp",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
 },
 "author": "",
"license": "ISC",
 "dependencies": {
"babel-core": "^6.1.2",
"babel-loader": "^6.0.1",
"babel-preset-react": "^6.1.2",
"babelify": "^7.2.0",
"react": "^0.14.2",
"react-dom": "^0.14.2",
"webpack": "^1.12.3"
 }
 }

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Answer 1

leo*_*ini 12

它解决了.答案是安装预设npm i --save babel-preset-es2015 babel-preset-react.然后在加载器中的webpack.config.js中添加另一个键:query: {presets: ['es2015', 'react'] }.应该好好去.

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