BabelMinifyWebpackPlugin. A Webpack Plugin for babel-minify - A babel based minifier. Install. npm install babel-minify-webpack-plugin --save-dev Hello, I think this is probably a bug with this plugin since the dev build works fine and when I run webpack --progress it gets stuck in: 92% chunk asset optimization UglifyJSPlugin Below, the rele. I have setup webpack for my project. I want to have css sources minified. Here is the sroaden.site: var webpack = require('webpack'); const path = require('path'); const UglifyJ. Source Maps. Though disabled by default, source maps may be activated by calling the sroaden.siteMaps() method in your sroaden.site file. Though it comes with a compile/performance cost, this will provide extra debugging information to your browser's developer tools .