JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
    <link href="http://cdn.kendostatic.com/2012.2.710/styles/kendo.common.min.css" rel="stylesheet" />
    <link href="http://cdn.kendostatic.com/2012.2.710/styles/kendo.default.min.css" rel="stylesheet" />

    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.core.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.calendar.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.popup.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.datepicker.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.numerictextbox.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.validator.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.data.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.binder.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.editable.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.draganddrop.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.window.min.js"></script>
    <script src="http://cdn.kendostatic.com/2012.2.710/js/kendo.grid.min.js"></script>
    
    <script type="text/x-kendo-template" id="editRowTemplate">
        <div>
            Name: <input type="text" />
        </div>
        <div id="editTemplateGrid">
        </div>
    </script>
</head>
<body>

    <div id="mainGrid">
    </div>
    
    <script language="javascript">
        var i = 4;
       
        $("#mainGrid").kendoGrid({
            dataSource: {
                change: function(e) {
                    if (e.action == "add") {
                        e.items[0].dirty = true;
                        kendo.data.ObservableObject.fn.set.call(e.items[0],             "Id", i);
        i++;
                    }
                    else if(e.action ==...