Babel7でwebpack.config.babel.jsを使う

Babel7でwebpack.config.babel.jsを動かす

普通にやろうとすると、SyntaxError: Unexpected token importで怒られる。

@babel/registerを入れると解決します。
参考：https://github.com/webpack/webpack/issues/5960

私の設定を載せます。
concurrentlyとeslintは必須ではないです。

package.json

{
  "name": "hello babel7",
  "version": "1.0.0",
  "description": "",
  "private": true,
  "scripts": {
    "webpack": "webpack -w",
    "lint": "eslint src/*.*",
    "build": "webpack",
    "start": "concurrently \"npm run webpack\" \"npm run lint\""
  },
  "keywords": [],
  "author": "KAJIKEN <[e-mail]>",
  "license": "MIT",
  "devDependencies": {
    "@babel/core": "^7.1.2",
    "@babel/preset-env": "^7.1.0",
    "@babel/register": "^7.0.0",
    "babel-loader": "^8.0.4",
    "webpack": "^4.20.2",
    "webpack-cli": "^3.1.2",
    "concurrently": "^4.0.1",
    "eslint": "^5.6.1"
  },
  "dependencies": {}
}

.babelrc

{
  "presets": [
    "@babel/preset-env"
  ]
}

webpack.config.babel.js

import glob from 'glob';

export default {
  mode: 'development',
  //mode: 'production',
  entry: glob.sync('./src/*.js'),
  output: {
    path: __dirname + '/dist',
    filename: 'bundle.js',
    publicPath: '/',
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.js$/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              presets: [
                '@babel/preset-env',
              ]
            }
          }
        ]
      }
    ]
  }
};

eslintの設定はお好みで。

.eslintrc.json

{
  "rules": {
    "quotes": [
      "off",
      "double"
    ],
    "linebreak-style": [
      "off",
      "windows"
    ],
    "semi": [
      "error",
      "always"
    ],
    "no-console": "off"
  },
  "env": {
    "es6": true,
    "browser": true,
    "node": true
  },
  "parserOptions": {
    "sourceType": "module"
  },
  "plugins": []
}