JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/jquery/jquery-tmpl/raw/master/jquery.tmpl.js"></script>
<script src="https://github.com/greenlaw110/knockout/raw/master/build/output/knockout-latest.debug.js"></script>
<script src="https://github.com/SteveSanderson/knockout.mapping/raw/master/build/output/knockout.mapping-latest.debug.js"></script>
<div data-bind="template: {name: 'mytmpl', afterRender: changeBackground}"></div>

<script type="text/html" id="mytmpl">
    <label>name</label> <input type="text" data-bind="value: name"></input>
</script>

JavaScript

var viewModel = {
    name: ko.observable('John'),
    changeBackground: function(nodesArray, dataValue) {
        $(nodesArray[0]).css('fontWeight', 'bold');
    }
};

ko.applyBindings(viewModel);