Created: 2012-03-24 18:28
Updated: 2019-03-06 21:16
License: other

Noam Build Status

Noam is a JavaScript library for working with automata and formal grammars for regular and context-free languages.

Noam's name comes from Noam Chomsky and his hierarchy of formal languages and grammars.


Pre-alpha. Horrible performance, only functions for working with FSMs implemented. Stay tuned. See TODO list.

Web apps

  • Regular Expressions Gym - Slim your regexes one step at a time! Source is here.
  • FSM Simulator - Visually simulate the operation of your DFAs, NFAs and eNFAs one input symbol at a time! Source is here.
  • FSM2Regex - Convert your FSMs to regexes and your regexes to FSMs! Source is here.


If you just want to use noam (and not contribute to development), install using npm:

npm install noam

To use noam in a browser, add a <script> link to the browser-based versions found in lib/browser/:

<script src=""></script>

or minified version:

<script src=""></script>


  1. Fork and/or clone repo: git clone
  2. Change dir to noam: cd noam
  3. Install dependencies: npm install
  4. Make changes to noam sources (./src), tests (./test) or benchmarks (./benchmarks)
  5. Build using grunt (validate -> lint -> concat -> test -> minify): grunt (on linux and osx), grunt.cmd (on windows)
  6. (bonus points) Run istanbul cover node_modules/jasmine-node/bin/jasmine-node test to get code coverage reports in ./coverage. Add more tests or change existing tests to improve coverage
  7. Fix issues reported by tests and coverage reports, and then repeat 5) and 6)
  8. Commit, push and make a pull request, or send a git patch by e-mail
  9. E-mail me if you have questions (e-mail address is below)


Noam is developed by Ivan Zuzak <> and Ivan Budiselic. Contributors: Vedrana Jankovic.

Noam is built with many awesome open-source projects:

  • structure.js - used for its JS hashtable implementation
  • cli-table - used for drawing ascii tables in the command-line version of noam
  • jQuery - used for the FSM Web application playgrounds
  • NodeJS - used for running the command-line version of noam
  • viz.js - used for drawing FSM graphs in Web applications
  • Bootstrap - used for styles in regex simplification webapp
  • JsDiff - used for diffing regexes in regex simplifier webapp
  • jasmine-node and grunt-jasmine-node - used for unit testing
  • benchtable and benchmark.js - used for performance benchmarking
  • grunt-jsvalidate - used for JavaScript validation
  • grunt - used as the build tool for the project
  • JSHint - used for linting the noam lib
  • UglifyJS - used for minifying the noam lib
  • PhantomJS - used for testing webapps
  • WD.js - used for testing webapps
  • Istanbul - used for code coverage


Licensed under the Apache 2.0 License.

gaugestracking alpha

Cookies help us deliver our services. By using our services, you agree to our use of cookies Learn more