Merge JavaScript files with their corresponding source maps

Dealing with the amalgamation of multiple JavaScript files alongside their source maps has been a challenging task for me.

The issue at hand involves my usage of Google Closure Compiler to scramble two javascript files, A and B, along with the generation of corresponding source maps A.map and B.map. Due to the application of distinct compilation options to each file, merging A and B into a single file does not seem to be a viable solution. Hence, I now aim to unify A and B into AB, as well as merge A.map and B.map into AB.map.

Is there a recommended approach to accomplish this? Are there any specialized tools available for such a task?

javascriptobfuscationgoogle-closure-compilersource-maps

Answer №1

If you're looking to concatenate source files, there are various packages available that can help with this task. One option is the grunt-concat-sourcemap package for node, which allows you to easily concatenate files by following these steps:

grunt.initConfig({
  concat_sourcemap: {
    options: {},
    target: {
      files: {
        'dest/out.js': ['src/a.js', 'src/b.js']
      }
    }
  }
})

When you run this configuration, it will combine the specified source files in order and generate both 'dest/out.js' and 'dest/out.js.map' as output.

For more options, here are some useful links to packages for grunt, gulp, and plain node:

https://www.npmjs.com/package/grunt-concat-sourcemap

https://github.com/mikach/gulp-concat-sourcemap

https://www.npmjs.com/package/source-map-concat

Answer №2

Experiment with remapping; @babel/core utilizes it to alter the inputSourceMap.

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