JSFiddle - React, Tailwind, and code Playground

HTML

<div id="sample">
  Hello World
</div>

CSS

#sample {
 padding: 20px;
 height: 100px;
 overflow-y: auto;
 border: solid blue;
 margin: 10px 300px 10px 25px;
 position: 'relative'
}

JavaScript

window.addEventListener("resize", getSize);

  function getSize(){
      var node = document.getElementById('sample');
      var height = node.height;
      console.log('height: ', height);
      console.log(node);
  }