JSFiddle - React, Tailwind, and code Playground

HTML

<div class="titlebar"></div>
<div class="container"></div>

CSS

.titlebar {
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 40px;
    background: red;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    -webkit-user-drag: element;
    user-drag: element;
}