JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<p id="demo">
</p>
</body>
</html>
JavaScript
var cities = "Boston, NY, LA, Chicago";
var myArray = cities.split(',');
myArray;
document.getElementById("demo").innerHTML = myArray;