JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.3.1129/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.3.1129/styles/kendo.default.min.css">
<script src="http://cdn.kendostatic.com/2011.3.1129/js/kendo.all.min.js"></script>
<div id="vertical" style="height:100%;border:0;">
                <div>
                    <select id="size">
                                <option>S - 6 3/4"</option>
                                <option>M - 7 1/4"</option>
                                <option>L - 7 1/8"</option>
                                <option>XL - 7 5/8"</option>
                        </select>
                </div>
                <div>
                    <div id="horizontal" style="height: 100%; width: 100%;">
                        <div>
                            <p>
                                Inner splitter :: left pane
                            </p>
                        </div>
                   <div>
                            <p>
                                Inner splitter :: right pane
                            </p>
                        </div>
                    </div>
                </div>
                           </div>

CSS

html,body
{
    height:100%;
    margin:0;
    padding:0px;
}
 
html
{
    overflow:hidden;
}

JavaScript

$("#vertical").kendoSplitter({
                        orientation: "vertical",
                        panes: [
                            { collapsible: false, size: "25px" },
                            { collapsible: false }                        ]
                    });

                    $("#horizontal").kendoSplitter({
                        panes: [
                            { collapsible: false},
                            { collapsible: false, size: "200px" }                        ]
                    });function triggerResize() {
 
                $("#vertical").data("kendoSplitter").trigger("resize");
                    }

$("#size").kendoDropDownList();

$(window).resize(triggerResize);