JSFiddle - React, Tailwind, and code Playground

HTML

<textarea class="note-codable"></textarea>

JavaScript

$.fn.hasVerticalScrollBar = function() {
  if (this[0].clientHeight < this[0].scrollHeight) {
    return true
  } else {
    return false
  }
};
$(document).on('keydown','.note-codable',function(event){
  if(event.keyCode == 13) { }
  if ($(this).hasVerticalScrollBar()) {
    alert("Please Something");
  }
});