original build
$ npm run build:1
original build + NamedModulesPlugin
$ npm run build:2
original build + recordsPath
$ npm run build:3
original build + NamedModulesPlugin + recordsPath
$ npm run build:4
original build + HashedModuleIdsPlugin.js
$ npm run build:5
original build + HashedModuleIdsPlugin.js + recordsPath
$ npm run build:6