JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://knockoutjs.com/downloads/knockout-3.0.0.js"></script>
<!-- ko if: Property1 -->.
<input type="text" data-bind="value: Property1" />
<!-- /ko -->
<!-- ko if: Property2 -->.
<input type="text" data-bind="value: Property2" />
<!-- /ko -->

JavaScript

var myModel = function () {
    var self = this;


    self.Property1 = ko.observable("non-empty");
    self.Property2 = ko.observable();

};

var m = new myModel();
ko.applyBindings(m);