knockout validation with throttle

HTML

<script src="https://raw.github.com/SteveSanderson/knockout/master/build/output/knockout-latest.debug.js"></script>
<script src="https://raw.github.com/ericmbarnard/Knockout-Validation/master/Src/knockout.validation.js"></script>
label1 <input type="text" data-bind="value:label1" /><br/>
label2 <input type="text" data-bind="value:label2" />


<hr/>

<div data-bind="text: ko.toJSON($root)"></div>

JavaScript

var viewModel = {
    label1: ko.observable('label1').extend({required: true}),
    label2: ko.observable('label2').extend({required: true, throttle: 1}),
};

ko.applyBindings(viewModel);