JSFiddle - React, Tailwind, and code Playground

HTML

<ul class='sidebar'>
    <li>first</li>
    <li>second</li>
    <li>third</li>
    <li>fourth</li>
    <li>fifth</li>
    <li>sixth</li>
    <li>seventh</li>
</ul>
<ul class='main'>
    <li>zeroth</li>
</ul>

CSS

ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 2px solid #000;
}
ul li {
    margin: 3px;
    padding: 10px;
    border: 1px solid #ccc;
    background-color: #f3f3f3;
}
.sidebar {
    width: 20%;
    position: absolute;
    top: 200px;
    left: 0;
}
.main {
    width: 70%;
    position: absolute;
    left: 25%;
    top: 0;
    min-height: 700px;
}

JavaScript

$('.sidebar').sortable({
    connectWith: '.main'
});

$('.main').sortable();