# IT:AD:Knockout-Validation.JS #



<callout type="Navigation" class="small">

* [[../|(UP)]]
{{indexmenu>.#2|nsort tsort}}


</callout>


## Summary ##

Validation of the [[IT/About/#ViewModel/]] with Knockout-Validation offers distinct advantages of JQuery validation, MVC validation etc, which are validating the [[IT/About/#View/]]'s markup.

The advantage is that instead of validating a [[IT/About/#View/]] *serialiazation* of the data in an error-prone way (eg: "$3.00" in an `input@value` has to be first parsed/converted to a number), just validate the actual [[IT/About/#ViewModel/]] property directly. 

Advantages:

* simpler,
* less error prone,
* more testable.