JSFiddle - React, Tailwind, and code Playground

HTML

<form method="post">
     <button>Search</button>
     <span><input type="text" title="Search" /></span>
</form>

CSS

form{
    width: 500px;
    overflow: hidden;
    background-color: yellow;
}
input{
    width: 100%
}
span {
    display: block;
    overflow: hidden;
    padding-right:10px;
}
button{
    float: right;
}