JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
        <title>Test</title>
    </head>
    <body>
        <div id="container">
            <div class="icon-wrapper">
              <div class="icon">ICON1</div>
              <div class="icon">ICON2</div>
            </div>
        </div>
    </body>
</html>

CSS

#container {
    position: relative;
    width: 200px;
    height: 200px;
    border: 1px solid red;
}

.icon {
    border: 1px solid green;
    float:left;
}
.icon-wrapper {
    position: absolute;
    bottom: 0;
    left: 0;
}