define-constant-plugin v1.0.2

npm i --save-dev define-constant-plugin

webpack.config.js

const DefineConstantPlugin = require('define-constant-plugin')

module.exports = {
  entry: 'index.js',
  plugins: [
    new DefineConstantPlugin({
      'process.env':  DefineConstantPlugin.runtimeValue(Date.now, {
        fileDependencies: [fileDep],
      })
    })
  ],
}