JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
   <h2> Name </h2><br /> <input type="text">
</div>

CSS

#container{
  display: inline;
  position: relative;
}

h2,input{
  display:inline;
}


input {
  width: -webkit-fill-available;
  position: absolute;
}