A Karma plugin. Compile JSON files Angular values on the fly.

npm install karma-ng-json2js-preprocessor
11 downloads in the last day
69 downloads in the last week
225 downloads in the last month


Preprocessor for converting JSON files to AngularJS values.


The easiest way is to keep karma-ng-json2js-preprocessor as a devDependency in your package.json.

  "devDependencies": {
    "karma": "~0.10.9",
    "karma-ng-json2js-preprocessor": "~0.0.5"

You can simple do it by:

npm install karma-ng-json2js-preprocessor --save-dev


// karma.conf.js
module.exports = function(config) {
    preprocessors: {
      '**/*.html': ['ng-html2js'],
      '**/*.json': ['json2js']

    plugins: [

    files: [

    ngJson2JsPreprocessor: {
      // strip this from the file path
      stripPrefix: 'test/fixture/',
      // prepend this to the
      prependPrefix: 'served/',

      /* or define a custom transform function
      cacheIdFromPath: function(filepath) {
        return cacheId;

How does it work ?

This preprocessor converts JSON files into Angular values and puts them in separate Angular modules; each named the same as the source JSON file and generates Angular modules.

For instance this test/fixture/data.json ...

    prop: val

... with the configuration given above will be converted into:

angular.module('served/data.json', []).value('servedData', {
    prop: 'val'

Inject json fixture into your test case:

describe('me', function(){

    it('should not fail', function() {
        var testFixture;
        inject(function (_servedData_) {
            testFixture = _servedData_;

            prop: 'val'



Before sending a pull request, run grunt in terminal to make sure all tests pass. To continuously run tests during development, run karma start.

For more information on Karma see the homepage.

npm loves you