Investigate source-map-loader

[robmcguinness]

https://github.com/webpack-contrib/source-map-loader

This loader is especially useful when using 3rd-party libraries having their own source maps. If not extracted and processed into the souce map of the webpack bundle, browsers may misinterpret source map data. source-map-loader allows webpack to maintain source map data continuity across libraries so ease of debugging is preserved.

{
  test: /\.js$/,
  use: ["source-map-loader"],
   enforce: "pre"
}