Does Karma support source map files?

Question

Is it possible to configure Karma to use source map files for stacktraces? I see that there are a few issues on GitHub which appear to have been closed? I can't however find any example of doing so.

If this is supported can someone illustrate an example config?

Answer 1

In your karma.config.js file add

config.set({
files: [{
        pattern: '**/*.js.map',
        included: false
      },
...
});

This has worked for me, and files are now served by karma.

Answer 2

You need a preprocessor to look at source maps in karma: have a look at karma-sourcemap-loader to preprocess your data and locate the source map files. A limitation of the library is that the source maps must be in the same folder as the js files, with the same name - but different extension of course.