Reactjs Babel无法从当前目录上方的文件传输JSX

我有一个monorepo，其文件结构如下：

/root

  /-ProjectA

  /-ProjectB

  /-common

在/ProjectA中，我有一个React应用程序，它从/common导入一个文件。当我试图在Webpack Dev服务器中启动它时，我从Babel Loader得到一个错误，它说在JSX启动的导入的公共文件中有一个编译错误

如果我将公共文件移动到ProjectA中并从那里导入，那么一切都可以正常工作，因此该特定文件中没有问题（此外，这是一个非常简单的人为示例）

/common/index.js（这是此目录中唯一的文件）

/ProjectA/webpack.config.js

{
  test: /\.(js|jsx)$/,
  exclude: /node_modules/,
  include: [
    path.resolve('.'),
    path.resolve('../common'),
  ],
  use: {
    loader: 'babel-loader'
  }
}

/ProjectA/package.json

{
  "dependencies": {
    "react": "^16.8.6",
    "react-dom": "^16.8.6"
  },
  "devDependencies": {
    "@babel/core": "^7.5.4",
    "@babel/preset-env": "^7.5.4",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.6",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.35.3",
    "webpack-cli": "^3.3.6",
    "webpack-dev-server": "^3.7.2"
  }
}

"scripts":{
"dev-server": "webpack-dev-server",
 }

config.webpack.js(without styling loaders)
    module.exports = {
      entry: './src/app.js',
      output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
      },
      module: {
        rules: [{
          loader: 'babel-loader',
          test: /\.js$/,
          exclude: /node_modules/
        }, 
      devtool: 'cheap-module-eval-source-map',
      devServer: {
        contentBase: path.join(__dirname, 'public')
      }
    };

---

为什么babel无法从当前目录外传输文件？有没有办法解决这个问题或者我的配置中有问题？

将这一行添加到webpack.config.js

 devServer: { contentBase: path.join(__dirname, "public") }

将此脚本添加到package.json

{
  "dependencies": {
    "react": "^16.8.6",
    "react-dom": "^16.8.6"
  },
  "devDependencies": {
    "@babel/core": "^7.5.4",
    "@babel/preset-env": "^7.5.4",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.6",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.35.3",
    "webpack-cli": "^3.3.6",
    "webpack-dev-server": "^3.7.2"
  }
}

"scripts":{
"dev-server": "webpack-dev-server",
 }

config.webpack.js(without styling loaders)
    module.exports = {
      entry: './src/app.js',
      output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
      },
      module: {
        rules: [{
          loader: 'babel-loader',
          test: /\.js$/,
          exclude: /node_modules/
        }, 
      devtool: 'cheap-module-eval-source-map',
      devServer: {
        contentBase: path.join(__dirname, 'public')
      }
    };

现在这个命令应该可以运行你的应用程序了

npm run dev-server

---

将此行添加到webpack.config.js

 devServer: { contentBase: path.join(__dirname, "public") }

将此脚本添加到package.json

{
  "dependencies": {
    "react": "^16.8.6",
    "react-dom": "^16.8.6"
  },
  "devDependencies": {
    "@babel/core": "^7.5.4",
    "@babel/preset-env": "^7.5.4",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.6",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.35.3",
    "webpack-cli": "^3.3.6",
    "webpack-dev-server": "^3.7.2"
  }
}

"scripts":{
"dev-server": "webpack-dev-server",
 }

config.webpack.js(without styling loaders)
    module.exports = {
      entry: './src/app.js',
      output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
      },
      module: {
        rules: [{
          loader: 'babel-loader',
          test: /\.js$/,
          exclude: /node_modules/
        }, 
      devtool: 'cheap-module-eval-source-map',
      devServer: {
        contentBase: path.join(__dirname, 'public')
      }
    };

现在这个命令应该可以运行你的应用程序了

npm run dev-server

---

这没有任何效果。问题发生在babel中的Transfile步骤中。您必须将条目：destinationForSourceFile和out:{path:pathforpublicfolder，fileName:“bundle.js”}添加到您的配置文件中。这没有任何效果。问题发生在babel中的Transfile步骤中。您必须将条目：destinationForSourceFile和out:{path:pathforpublicfolder，fileName:“bundle.js”}添加到配置文件中