Quail: Accessibility Information Library

The project website is quailjs.io.

Quail is a Node module and a jQuery plugin that lets you easily check HTML for adherence to accessibility standards. It comes with over 200 tests which implement Open Accessibility Tests and comes with WCAG 1.0, WCAG 2.0, and Section 508 guidelines.

Developers can build their own guidelines, or easily build a custom guideline that integrates with their project. While the project supports checking entire HTML pages, integration with a CMS to check partial HTML content is probably the most popular use case.

Notice for developers working in the 2.2.x version.

Please base your changes on the master-2.2.x branch.

Requirements

You will need the following installed on your system to run Quail.

1. Node.js
2. Grunt & Grunt CLI
3. Bower
4. Java JDK (To run Selenium Server)
5. Karma

Using Quail

Setup

Run the following commands to build Quail.

git clone https://github.com/quailjs/quail.git
cd quail
npm install
bower install
grunt build

Using Quail from the command line

To see the Quail CLI API, run the following. You can also add the Quail bin directory to your PATH if you are so inclined.

./bin/quail --help

Once the command is set up, you can run the following to test any addressable web page.

./bin/quail eval http://placekitten.com

Write the results as a JSON object out to file in an existing directory.

./bin/quail evaluate http://placekitten.com -o ./analyses

You can also pass configurations to the evaluator.

./bin/quail evaluate http://placekitten.com -c ~/path/to/myconfig.json -o ./analyses

This is the default set of configurations. Your configurations will replace the defaults.

{
  "phantomjs": {
    "resourceTimeout": 5000
  },
  "blacklists": {
    "domains": [
      "fbstatic.com",
      "facebook.com",
      "twitter.com",
      "google-analytics.com",
      "googleadservices.com",
      "googlesyndication.com",
      "perfectaudience.com",
      "typekit.com",
      "sharethis.com",
      "doubleclick.com",
      "optimizely.com",
      "gigya.com"
    ],
    "mimetypes": [
      "application/x-shockwave-flash",
      "application/(ms)?(word|powerpoint|excel)"
    ],
    "headers": []
  }
}

The phantomjs configurations affect the PhantomJS runtime.

The blacklists block resource resource requests from PhantomJS by the resource's domain, its mime type or a header name in the request. Currently the only header value that can be blocked is the value of Accept (mime type).

To work on an existing assessment in a browser (so that breakpoints can be set in the console), run the following.

./bin/quail dev aMustHaveTitle

The following is experimental, which means it probably won't work. You can generate a new assessment with this command.

./bin/quail gen someNewAssessment

Testing

Core unit tests in Karma

./node_modules/karma/bin/karma start ./config/karma-unit.conf.js

Testing assessments in Selenium

All assessments. This takes about 10 minutes to run.

node ./test/assessmentSpecs/testRunner.js

An individual assessment. This takes about 2 seconds to run.

node ./test/assessmentSpecs/testRunner.js -I aMustHaveTitle

In a specific browser.

_BROWSER=chrome node ./test/assessmentSpecs/testRunner.js

Documentation

Full documentation is available via readthedocs.org.

Contributing

Pull requests should be made against the master branch.

We are currently looking for the following types of contritions.

1. Help with our current Milestone objectives.
2. JavaScript enthusiasts who want a chance to build out:
3. A dependency injection load pattern: Replace our load-order-depending spinup with an Inversion of Control pattern
4. A pub/sub pattern: Refactor the custom event bubbling code in the core Classes (e.g. TestCollection) to use a real event pub/sub library
5. Improve an NPM package, better build and test scripts, etc: Improve the Quail NPM package

Credits

• Quail is maintained by Jesse Renée Beach
• The Kwaliteitsinstituut Nederlandse Gemeenten (KING), who have funded many developer hours.
• The CKEditor development team for their contributions.

References

HTML Test Suite for WCAG 2.0, Sorted by Guideline

Legal

QUAIL is covered under the MIT License, and is copyright (c) 2015 by Jesse Beach. Current license is at http://quailjs.org/license.