npm i -D source-map-loader
module.exports = { module: { rules: [ { test: /\.js$/, use: ["source-map-loader"], enforce: "pre" } ] } };
This extracts SourceMaps from all js files (including node_modules). This is not very performant, so you may want to only apply the loader to relevant files.
© 2012–2016 Tobias Koppers
Licensed under the Creative Commons Attribution License 4.0.
https://webpack.js.org/loaders/source-map-loader/