JSFiddle - React, Tailwind, and code Playground

HTML

<div class="chatContainer">
    <div class="chatWindow"></div>
    <div class="chatWindow"></div>
</div>

CSS

body{
    height: 2000px;
}
.chatContainer {
    position: fixed;
    bottom: 10px;
}

.chatWindow {
	display: inline-block;
	position: relative;
    float: left;
	width: 250px;
	height: 280px;
	bottom: 10px;
    margin-left: 10px;
	background: #FAFAFA;
	border-radius: 3px;
	border: 1px solid #7a7a7a;
	z-index: 100000;
}