npm install @wepy/plugin-define --save-dev

const DefinePlugin = require('@wepy/plugin-define');

module.exports = {
  plugins: [
    DefinePlugin({
      BASE_URL: JSON.stringify('http://foobar.com'),
      'process.env.NODE_ENV': 'development',
      'typeof window': JSON.stringify('undefined'),
      DEV: true
    })
  ]
};