JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrap">
    <textarea id="txtInput" rows="6" cols="20"></textarea>
    <div id="test"></div>
</div>

CSS

#wrap
{
   background-color:green;
   height:210px;
   width:440px;
}
#txtInput
{
    height:100px;
    width:100%;
    margin:0px;
    padding:0px;
}
#test
{
    background-color:gray;
    height:100px;
    width:100%;
    margin:0;
    padding:0;
}