Karma plugin that locates and loads existing javascript source map files.
Clone or download
Latest commit 53d758f Jan 14, 2016
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
.gitignore Initial commit Feb 18, 2014
LICENSE First version. Feb 18, 2014
README.md Version bump Feb 22, 2015
index.js Merge pull request #26 from mlaval/graceful-fs Jan 13, 2016
package.json Version bump Jan 13, 2016

README.md

karma-sourcemap-loader

Preprocessor that locates and loads existing source maps.

Why

When you use karma not in isolation but as part of a build process (e.g. using grunt or gulp) it is often the case that the compilation/transpilation is done on a previous step of the process and not handled by karma preprocessors. In these cases source maps don't get loaded by karma and you lose the advantages of having them.

How it works

This plug-in supports both inline and external source maps.

Inline source maps are located by searching "sourceMappingURL=" inside the javascript file, both plain text and base64-encoded maps are supported.

External source maps are located by appending ".map" to the javascript file name. So if for example you have Hello.js, the preprocessor will try to load source map from Hello.js.map.

Installation

Just add karma-sourcemap-loader as a devDependency in your package.json.

{
  "devDependencies": {
    "karma-sourcemap-loader": "~0.3"
  }
}

Or issue the following command:

npm install karma-sourcemap-loader --save-dev

Configuration

The code below shows a sample configuration of the preprocessor.

// karma.conf.js
module.exports = function(config) {
  config.set({
    preprocessors: {
      '**/*.js': ['sourcemap']
    }
  });
};