Webpack模块构建失败的意外令牌(rails反应构建)

Question

我正在进行react/rails构建,并首次使用webpack和babel.我正在使用两个文件并收到错误:

./app/assets/frontend/main.jsx中的错误
模块构建失败:
SyntaxError:/Users/cls/GitHub/rails_react/app/assets/frontend/main.jsx:Unexpected token(6:6)

第6行是: <Greet />

这是main.jsx文件

import Greet from './greet';

class Main extends React.Component {
    render() {
        return (
            <Greet />
        );
    }
}
let documentReady = () => {
    React.render(
        <Main />,
        document.getElementById('react')
    );
};
$(documentReady);

这是greet.jsx文件:

export default class Greet extends React.Component {
    render() {
        return <h2>Hello There</h2>
    }
}

这是我的webpack.config:

module.exports = {
  entry: "./app/assets/frontend/main.jsx",
  output: {
    path: __dirname + "/app/assets/javascripts",
    filename: "bundle.js"
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  module: {
    loaders: [
      { test: /\.jsx$/, loader: "babel-loader" }
    ]
  }
};

我没有babelrc文件？

Answer 1

首先确保使用解决方案在您的解决方案中安装react,babble和其他依赖项

   npm install react --save 

然后在web包的配置文件,请包括presets在query类似如下:

   module.exports = {
entry: 'main.jsx',
output: {
    // Output the bundled file.
    path: './src',
    // Use the name specified in the entry key as name for the bundle file.
    filename: 'bundle.js'
},
module: {
    loaders: [{
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel',
        query: {
            presets: ['react']
        }
    }]
},
externals: {
    // Don't bundle the 'react' npm package with the component.
    'react': 'React'
},
resolve: {
    // Include empty string '' to resolve files by their explicit extension
    // (e.g. require('./somefile.ext')).
    // Include '.js', '.jsx' to resolve files by these implicit extensions
    // (e.g. require('underscore')).
    extensions: ['', '.js', '.jsx']
}
}; 

Answer 2

所以在给出所有反馈的情况下,我能够弄明白.谢谢所有回答的人.

这是我需要做的:

npm install babel-preset-es2015

npm install babel-preset-react

并创建一个.babelrc文件(感谢azium和Kreozot)

`{
  "presets": [
    "react",
    "es2015"
  ]
}`