使用 webpack 和 React 模块解析失败，即使使用 babel-loader

我正在尝试将 webpack 与 React 一起使用，但收到此错误：

./app/main.js 中出现错误

Module parse failed: /Users/me/app/main.js Line 2: Unexpected token
You may need an appropriate loader to handle this file type.
| //npm
| import React               from 'react';

这是我们感兴趣的 webpack 配置部分：

test: /\.jsx?$/,
        include: path.join(__dirname, 'src'),
        loader: 'babel-loader',
        query: {
            presets: ['es2015', 'react']

和 package.json：

"devDependencies": {
    "autoprefixer-loader": "^3.1.0",
    "babel-core": "^6.1.20",
    "babel-loader": "^6.1.0",
    "babel-preset-es2015": "^6.1.18",
    "babel-preset-react": "^6.1.18",
    "jest": "^0.1.40",
    "webpack": "^1.12.4",
    "webpack-dev-server": "^1.12.1",
    "css-loader": "^0.22.0",
    "style-loader": "^0.13.0"
  },
  "dependencies": {
    "babel-polyfill": "^6.1.19",
    "history": "^1.17.0",
    "react": "^0.14.2",
    "react-dom": "^0.14.2",
    "react-mdl": "^1.0.4",
    "react-router": "^1.0.2"
  }

查看错误信息中的路径

模块解析失败：/Users/me/app/main.js 第 2 行：意外的标记

看来该模块不在里面src文件夹。但是，您明确指定只有内部的模块path.join(__dirname, 'src')应该通过 babel 加载器。

Adjust include这样它也将包括main.js.