JSFiddle - React, Tailwind, and code Playground

HTML

<div class="search">
    <input type="text" />
    <button type="submit">Go</button>
</div>

CSS

.search {
    box-sizing: border-box;
    background: #0f0;
    padding: 5px 100px 5px 5px;
    position: relative;
    width: 300px;
}
.search input {
    width: 100%;
}
.search button {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 85px;
}