JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="left-drawer-menu">
            <li data-icon="contacts"><span class="km-icon km-mostrecent"></span>Available 1</li>
            <li data-icon="globe"><span class="km-icon km-mostviewed"></span>Available 2</li>
            <li data-icon="camera"><span class="km-icon km-organize"></span>Available 3</li>
            <li data-icon="organize"><span class="km-icon km-featured"></span>Available 4</li>
            <li data-icon="settings"><a href="#profile"><span class="km-icon km-action"></span>Available 5</a></li>
        </ul>

CSS

body, html {
    height: 100%;
    padding: 0px;
}

#left-drawer-menu {
    width: 100%;
    height: 90%;
    list-style-type: none;
    margin: 0px;
    padding: 0px;

    display: -webkit-flex;
    -webkit-flex-direction: row;

    display: flex;
    flex-direction: row;
}

#left-drawer-menu li{
    background-color: white;
    text-align: center;
    flex-grow: 1;
}