JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <span>Hello<br>World</span>
    <b><textarea></textarea></b>
</div>

CSS

div
{
    height: 300px;
    width: 400px;
    border: 1px solid red;   
    display: table;
}
span
{
    display: block;
    background-color: red;
}
b
{    

    height: 100%;
    width: 100%;
    display: table-row;
}
textarea
{
    height: 100%;
    width: 100%;
    background-color: blue;    
}