Is there any way to disable/ignore input source maps?

[hjkcai]

Let's say there is a npm package that ship with some compiled js:

pkg
|-- index.js
|-- index.js.map

When this package is imported by some source code, rspack automatically pick up the .map file, which is awesome.

However in some cases source maps in the package are not usable enough. That may caused by having full path in the map, or having "webpack://" prefix in the paths, or the map is corrupted. And when analyzing package size with source-map-explorer, the input source map may make its result harder to read, since I'm looking into the source sizes of a package that I don't care.

It's something like webpack without source-map-loader. Is there anyway to achieve this? Thanks a lot!

[tt-a1i]

You can exclude specific packages from source map processing using the module.rules configuration:

// rspack.config.js
module.exports = {
  module: {
    rules: [
      {
        test: /\.js$/,
        include: /node_modules\/problematic-package/,
        enforce: "pre",
        use: [
          {
            loader: "source-map-loader",
            options: {
              filterSourceMappingUrl: () => false, // Disable source map loading
            },
          },
        ],
      },
    ],
  },
};

Or to disable input source maps globally, you can configure the devtool option to only generate new maps without consuming existing ones:

module.exports = {
  devtool: "source-map", // or false to disable entirely
  
  // Prevent loading .map files from node_modules
  module: {
    rules: [
      {
        test: /\.js$/,
        include: /node_modules/,
        enforce: "pre",
        loader: "source-map-loader",
        options: {
          filterSourceMappingUrl: (url, resourcePath) => {
            // Return false to ignore source maps from specific packages
            if (resourcePath.includes("problematic-package")) {
              return false;
            }
            return true;
          },
        },
      },
    ],
  },
};

This gives you fine-grained control over which packages' source maps to include.