A Karma plugin. Compile AngularJS templates to JavaScript on the fly.

npm install karma-ng-html2js-preprocessor
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karma-ng-html2js-preprocessor Build Status

Preprocessor for converting HTML files to AngularJS templates.

Note: If you are looking for a general preprocessor that is not tight to Angular, check out karma-html2js-preprocessor.


The easiest way is to keep karma-ng-html2js-preprocessor as a devDependency in your package.json.

  "devDependencies": {
    "karma": "~0.10",
    "karma-ng-html2js-preprocessor": "~0.1"

You can simple do it by:

npm install karma-ng-html2js-preprocessor --save-dev


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

    files: [

    ngHtml2JsPreprocessor: {
      // strip this from the file path
      stripPrefix: 'public/',
      // prepend this to the
      prependPrefix: 'served/',

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

      // setting this option will create only a single module that contains templates
      // from all the files, so you can load them all with module('foo')
      moduleName: 'foo'

How does it work ?

This preprocessor converts HTML files into JS strings and generates Angular modules. These modules, when loaded, puts these HTML files into the $templateCache and therefore Angular won't try to fetch them from the server.

For instance this template.html...


... will be served as template.html.js:

angular.module('template.html', []).config(function($templateCache) {
  $templateCache.put('template.html', '<div>something</div>');

See the ng-directive-testing for a complete example.

For more information on Karma see the homepage.

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