JSFiddle - React, Tailwind, and code Playground

HTML

<div id="samples" class="collappsed" onclick="expandList()">
    <ul id="sample-list" class="list"></ul>
</div>

CSS

#samples {
    position: fixed;
    margin-top: 100px;
    padding-top: 30px;
    width: 150px;
    height: 400px;
    overflow-y: scroll;
    z-index: 999;
    background-color: rgba(230, 230, 230, 0.7);
    border-style: solid;
    border-color: rgba(30, 30, 30, 1);
    border-width: 0px 20px 0px 0px;
    border-radius: 5px;
    -webkit-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    transition: all 0.5s ease;
}
#samples:hover {
    cursor: pointer;
}
#samples .meme-title {
    display: none;
}
#samples .list {
    list-style-type: none;
    margin: 0;
    padding: 0;
}
#samples .list li {
    display: inline-block;
    position: relative;
}
.thumbs-top {
    background: #eee;
    white-space: nowrap;
    margin-left: 5px;
    width: 120px;
    z-index: 2;
    height: 100px;
}
.expanded {
    left: 0px;
}
.collappsed {
    left: -130px;
}

JavaScript

function expandList() {

    $("#samples").attr("collappsed", "expanded");
}