ES6不能在Webpack中导入JSX模块

Question

由于某些原因，我似乎无法让Webpack从.JSX文件中导入模块。每次我试着运行Webpack，我都会收到这样的信息：

ERROR in ./src/Example.jsx
Module parse failed: /path/to/project/src/Example.jsx Unexpected token (6:12)
You may need an appropriate loader to handle this file type.
SyntaxError: Unexpected token (6:12)

问题是，在./src/exple.jsx中没有很多。事实上，这就是它所包含的全部内容：

import React from 'react';


export default class Example extends React.Component{
  render() {
    return (<h2>Hello world!!</h2>);
  }
};

Webpack在我的index.jsx文件中有类的时候没有任何问题，但是当我把它移到它自己的文件时，webpack突然想不出该怎么做了。我试图通过使用巴贝尔-插件-转换-反应-jsx来解决这个问题，但这似乎并没有解决我的问题。要让Webpack正确转换/解析.JSX文件，我需要做些什么？

/* package.json */

{
  ...,
  "dependencies": {
    "babel-loader": "^6.2.4",
    "babel-preset-es2015": "^6.9.0",
    "babel-preset-react": "^6.11.1",
    "react": "^15.2.1",
    "react-dom": "^15.2.1",
    "webpack": "1.13.1"
  },
  "devDependencies": {
    "concurrently": "^2.2.0",
    "eslint": "^3.1.1",
    "eslint-plugin-react": "^5.2.2",
    "jest-cli": "^13.2.3",
    "react-addons-test-utils": "^15.2.1",
    "webpack-dev-server": "^1.14.1"
  },
  "scripts": {
    "build": "webpack -p",
    "dev": "webpack-dev-server --port 9999",
    "start": "npm run build && python -m SimpleHTTPServer 9999",
    "test": "jest --verbose --coverage --config jest.config.json"
  }
}

/* webpack.config.js */

var path    = require('path');
var webpack = require('webpack');

var BUILD_DIR  = path.resolve(__dirname, 'build/');
var SOURCE_DIR = path.resolve(__dirname, 'src/');

module.exports = {
  entry: SOURCE_DIR + '/index.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  module: {
    loaders: [
      {
        test: /[^\.spec]+\.jsx$/,
        include: SOURCE_DIR,
        loader: 'babel'
      }
    ]
  }
};

/* .baberc */

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

/* src/index.jsx */

import React from 'react'
import ReactDOM from 'react-dom';

import Example from './Example'


ReactDOM.render(<Example />, document.getElementById('floor-plan'));

Answer 1

我让你的设置和这些修改一起工作。我将问题隔离到您的测试属性中。

var path    = require('path');
var webpack = require('webpack');

var BUILD_DIR  = path.resolve(__dirname, 'build/');
var SOURCE_DIR = path.resolve(__dirname, 'src/');

module.exports = {
  entry: SOURCE_DIR + '/index.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  resolve: {
    extensions: ['.js', '.jsx']
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        include: SOURCE_DIR,
        exclude: /node_modules/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015', 'react']
        },
      }
    ]
  }
};

Answer 2

原因可能是import Example from './Example' in index.jsx

webpack将把这视为js进口，而不是jsx。

试一试

import Example from './Example.jsx'