JSFiddle - React, Tailwind, and code Playground

HTML

<form>
  
    <div class="submit"><input type="submit" /></div>
    
    <div class="text"><input type="text" /></div>
    
</form>

CSS

.submit {
    float: right;
}

.text {
    overflow: hidden;
}

input[type="text"] {
    width: 100%;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box; 
}