JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.11.0.min.js"></script>
<div id="koHolder">
    <button data-bind="click: myFunction(CatID)">Test Click</button>
    <input type="text" data-bind="value: CatID,valueUpdate = 'keypress'" />
</div>

JavaScript

$(document).ready(function () {
    var vm = {
        Category: ko.observableArray(),
        Product: ko.observableArray(),
        CatID: ko.observable("113"),
        myFunction: function (obs) {
            alert(obs());
        }
    };
    ko.applyBindings(vm, document.getElementById("koHolder"));
});