JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="text">Soemtheifd 
  fdskfbskdbfd 
    
  dfsdfsdbhkfjsd</textarea>

JavaScript

textString = document.getElementById('text').innerHTML;
textArray = textString.split("\n");
for (i = 0; i < textArray.length; i++) {
    count = textArray[i].match(/ /g); //regex to get any number of spaces 
    alert(count.length);
}