Ruby gem for JSLint via the The Ruby Racer library (JavaScript V8 Engine) in a format targeted directly at CI environments and thoroughly tested
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


Build Status


jslint-v8 is simply a ruby wrapper that helps you run JSHint as an automated code quality standards tool inside your projects. It's geared towards being run in a continuous integration process (CI), such as Jenkins.

While it is focused on Ruby projects it can just as easily be used for any other language out there so long as you have Ruby installed on your system.

Like it's name implies we run JSHint on the JavaScript V8 interpreter so, in other words, it runs really really fast.

How to use

  1. Make sure you have Ruby and Rubygems installed on your computer (most operating systems except for Windows have this already)

  2. In your console run: gem install jslint-v8

  3. Run the following command jslint-v8 path/to/file.js

For full details on using the command line interface simply type jslint-v8 --help into your console

Default options

You can see which options are enabled by default by examining the output of jslint-v8 --help

Rake Task

In addition to the CLI you can also set up a Rake task to automatically run against a set of files. Inside your Rakefile add the following:

   require 'rake'
   require 'jslint-v8'

   namespace :js do do |task| = "lint"
         task.description = "runs jslint against all important javascript files"
         task.output_stream = STDOUT
         task.include_pattern = "app/javascripts/**/*.js"
         task.exclude_pattern = "app/javascripts/{generated,lib}/**/*.js"
         # pass boolean options to jshint like this, these are merged with the default options
         task.jquery  = true  # predefine jQuery globals
         task.browser = true  # predefine Browser globals
         task.bitwise = false # allow bitwise operators to be used
         # or just access the options hash directly, be sure to use strings for keys
         task.lint_options["strict"] = true

Modify the above as needed.

The code above:

  • generates a rake task named "js:lint" with the given description
  • write results to standard output (STDOUT)
  • run against all javascript files under app/javascripts except under app/javascripts/lib and app/javascripts/generated
  • runs with all the default jshint options enabled except bitwise, but also enabling strict, jquery and browser


Whatever works, but my preference is for you to fork this repository on github and write your changes on a separate branch. When finished you can send them to me by issuing a pull request.

Feature Requests / Suggestions

You can open up an Issue here on Github or if you'd prefer send me a message here on Github, please try and give me a good use case for your feature request / suggestion.


jslint-v8 is released under the MIT license