JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.0.0.js"></script>
<select data-bind="value: countryId">
    <option value="0">(Select Country)</option>
    <option value="1">Country 1</option>
    <option value="2">Country 2</option>
    <option value="3">Country 3</option>
    <option value="4">Country 4</option>
</select>
<label data-bind="text: countryId"></label>

JavaScript

var viewModel = {
    countryId: ko.observable(0)
};

ko.applyBindings(viewModel);