segmentio/nightmare — pull request #58 by johntitus (2014-10-15 17:14:04+00:00)
Title: add .visible()

Determines if a selector is visible or not. Used jQuery's check, which is so straightforward I'm worried I missed something:

https://github.com/jquery/jquery/blob/10399ddcf8a239acc27bdec9231b996b178224d3/src/css/hiddenVisibleSelectors.js