在webpack.config.babel.js中使用'import'时出错

Question

(function (exports, require, module, __filename, __dirname) { import path from 'path'
                                                              ^^^^^^
SyntaxError: Unexpected token import

我使用时会发生此错误webpack-dev-server --hot.

这似乎是因为它无法读取import或webpack不支持import.我尝试使用,babel-register但它不起作用.有什么方法可以解决这个问题吗？请参阅下面的代码.

webpack.config.babel.js

import path from 'path'
import webpack from 'webpack'
import HtmlPlugin from 'html-webpack-plugin'
import ExtractTextPlugin from 'extract-text-webpack-plugin'

const vueLoaders = {
  html: 'pug-loader',
  css: ExtractTextPlugin.extract({
    use: 'css-loader',
    fallback: 'vue-style-loader'
  }),
  scss: 'vue-style-loader!css-loader!sass-loader',
  sass: 'vue-style-loader!css-loader!sass-loader?indentedSyntax'
}

export default {
  entry: './client/main.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  },

  plugins: [
    new ExtractTextPlugin('bundle.css'),
    new HtmlPlugin({
      title: 'sex',
      template: 'client/assets/index.pug'
    })
  ],

  module: {
    rules: [
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          use: 'css-loader', fallback: 'style-loader'
        })
      }, {
        test: /\.s[a|c]ss$/,
        use: ExtractTextPlugin.extract({
          use: ['css-loader', 'sass-loader'], fallback: 'style-loader'
        })
      }, {
        test: /\.pug$/,
        loader: 'pug-loader'
      }, {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      }, {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: { loaders: vueLoaders }
      }, {
        test: /\.(png|jpe?g|gif|svg|ttf|woff2?|eot)$/,
        loader: 'file-loader',
        options: { name: '[name].[ext]?[hash]' }
      }
    ]
  },

  resolve: {
    alias: {
      'vue$': 'vue/dist/vue.common.js'
    }
  },

  devServer: {
    host: '0.0.0.0',
    historyApiFallback: true
  },
  performance: {
    hints: false
  },
  devtool: '#eval-source-map'
}

if (process.env.NODE_ENV === 'production') {
  module.exports.devtool = '#source-map'
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': { NODE_ENV: '"production"' }
    }),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: { warnings: false }
    }),
    new webpack.LoaderOptionsPlugin({ minimize: true })
  ])
}

Answer 1

babel-register只能在您调用的babel中转换所需的模块require("babel-register");,而不是模块本身.

您可以使用中间步骤来使用Webpack配置.

webpack.config.js

require('babel-register');
module.exports = require('./webpack.config.babel.js');

webpack.config.babel.js

import path from 'path'
import webpack from 'webpack'
import HtmlPlugin from 'html-webpack-plugin'
import ExtractTextPlugin from 'extract-text-webpack-plugin'

const vueLoaders = {
  html: 'pug-loader',
  css: ExtractTextPlugin.extract({
  ...

Answer 2

importNode目前不支持 ES6语法。require同时使用 CommonJS语法。

const path = require('path')
const webpack = require('webpack')
const HtmlPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')