The goggles: they do nothing.
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README.markdown

Pathology - remedial XPath engine for Internet Explorer

I'm writing Terminus, a Capybara driver for real browsers. Capybara uses XPath to select elements. Most browsers support the document.evaluate() method for querying the DOM with XPath. Some browsers (Internet Explorer, Android) do not.

So here we are.

Pathology provides an ad-hoc, informally specified, bug-ridden, slow implementation of half of document.evaluate(). It works well enough to run the entire Capybara test suite on my Android phone. It will likely remain incomplete because frankly life is too short.

Building the library

The XPath parser is based on Canopy and the library is built using Jake. These commands should get you a source and minified version plus a source map in the build/ directory.

git clone git://github.com/jcoglan/pathology.git
cd pathology/
npm install
./node_modules/.bin/canopy source/pathology/xpath.peg
gem install jake
jake

License

Copyright (c) 2010-2012 James Coglan

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.