JSFiddle - React, Tailwind, and code Playground

HTML

<p id="text">Sample</p>

JavaScript

var values = '';
var test = ['a', '', 'c', '', 'e'];
for (var i=0; i < test.length; i++) {
  if (test[i] == '') {
      alert("Empty at : " + i);
      continue;
  } else if (values != '') {
    values += ',';  
  }
  values += test[i];
}

var ele = document.getElementById("text");
ele.textContent = values;