The official JavaScript implementation of Cucumber.
Last updated 2 months ago by charlierudolph .
MIT · Repository · Bugs · Original npm · Tarball
$ cnpm install cucumber 
SYNC missed versions from official npm registry.


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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 master. Documentation for 2.x is available here. Documentation for 1.x is available here.

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