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Cucumber for JavaScript


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Cucumber is a tool for running automated tests written in plain language. Because they’re written in plain language, they can be read by anyone on your team. Because they can be read by anyone, you can use them to help improve communication, collaboration and trust on your team.

Cucumber.js is the JavaScript implementation of Cucumber and runs on both Node.js (4 and above) and modern web browsers.

Try it now

We’ve put a demo of Cucumber.js to run in your browser. Why don’t you give it a try before anything else?

Help & support


See for info on contributing to Cucumber.js.

Code of Conduct

Everyone interacting in this codebase and issue tracker is expected to follow the Cucumber code of conduct.


npm downloads


Cucumber.js is available as an npm module.

$ npm install cucumber


  • Grab the browserified code from the latest release in the dist folder


The following documentation is for 2.x. Documentation for 1.x is available here.

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Top Contributors

jbpros charlierudolph aslakhellesoy simondean kevgo samccone zs-zs mjhm ExplodingCabbage olivoil eddieloeffen paulbjensen akania SkadeGlad vantreeseba benjamine worldofchris morrislaptop DaleGardner ReactiveRaven quex46 elwynelwyn fernandoacorreia gabehayes garytaylor hmalphettes isra17 jan-molak jeduden the-simian


package version
assertion-error-formatter ^2.0.0
babel-runtime ^6.11.6
bluebird ^3.4.1
cli-table ^0.3.1
colors ^1.1.2
commander ^2.9.0
cucumber-expressions ^4.0.3
cucumber-tag-expressions ^1.0.0
duration ^0.2.0
escape-string-regexp ^1.0.5
figures 2.0.0
gherkin ^4.1.0
glob ^7.0.0
indent-string ^3.1.0
is-generator ^1.0.2
is-stream ^1.1.0
lodash ^4.0.0
mz ^2.4.0
progress ^2.0.0
resolve ^1.3.3
stack-chain ^1.3.5
stacktrace-js ^2.0.0
string-argv 0.0.2
title-case ^2.1.1
upper-case-first ^1.1.2
util-arity ^1.0.2
verror ^1.9.0
dev ansi-html ^0.0.7
babel-cli ^6.10.1
babel-eslint ^7.1.1
babel-plugin-external-helpers ^6.18.0
babel-plugin-istanbul ^4.1.3
babel-plugin-transform-async-to-module-method ^6.16.0
babel-plugin-transform-function-bind ^6.8.0
babel-plugin-transform-object-rest-spread ^6.23.0
babel-plugin-transform-promise-to-bluebird ^1.1.1
babel-plugin-transform-runtime ^6.9.0
babel-preset-es2015 ^6.9.0
babel-register ^6.9.0
babelify ^7.3.0
browserify ^14.3.0
chai ^4.0.1
coffee-script ^1.10.0
connect ^3.4.0
coveralls ^2.13.1
dependency-lint ^5.0.1
eslint ^4.1.1
eslint-config-prettier ^2.2.0
eslint-plugin-babel ^4.0.0
eslint-plugin-prettier ^2.1.2
fs-extra ^3.0.1
mocha ^3.1.2
nyc ^11.0.2
prettier ^1.5.2
regenerator-runtime ^0.10.0
serve-static ^1.10.0
sinon ^2.2.0
sinon-chai ^2.11.0
stream-to-string ^1.1.0
tmp 0.0.31


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