ericmbarnard/Knockout-Validation — pull request #197 by adbre (2012-12-26 22:18:31+00:00)
Title: Descriptive error for undefined validationElement

This error handling will give a more descriptive error if the validationElement binding value is referring to a variable that does not exists (probably a typo).

The native js error (chrome) is not so informative:

Uncaught TypeError: Cannot call method 'extend' of undefined