yky-wx-components1/webpack.config.js

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var path = require('path');
module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'index.js',
    libraryTarget: 'commonjs2'
    // libraryTarget: 'umd'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        include: path.resolve(__dirname, 'src'),
        exclude: /(node_modules|bower_components|build)/,
        use: {

          options: {
            presets: ["env", "stage-0"],
            plugins: [
              'transform-decorators-legacy',
              'transform-class-properties',
              'transform-object-rest-spread',
              ['transform-runtime', {
                  helpers: false,
                  polyfill: false,
                  regenerator: true,
                  moduleName: 'babel-runtime'
                }
              ]
            ]
          }
        }
      }
    ]
  },
  externals: {
    'react': 'commonjs react'
  }
};