JSFiddle - React, Tailwind, and code Playground

HTML

<div class="ctr">
    <div class="icon-ctr">
        <span class="icon"></span>
    </div>
    <input type="text" />
</div>

CSS

.ctr {
    font-size: 0;
}

.ctr input {
    font-size: 14px;
    line-height: 14px;
    height: 14px;
    width: 100px;
    padding: 13px;
    border: 1px solid #000;
    
    vertical-align: top;
}

.icon-ctr {
    display: inline-block;
    height: 16px;
    padding: 12px;
    border: 1px solid #000;
    margin-right: -1px;
}

.icon {
    display: inline-block;
    height: 16px;
    width: 16px;
    background-color: #f00;
}