JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <panel id="pnl" />
</body>

JavaScript

function ParseList(list) {
    var reg = list.match(/\w+(,\w+)*/g);
    document.getElementById("pnl").innerHTML = "Total length:" + reg.length + "<br />";
    for (var i = 0; i < reg.length; i++) {
        document.getElementById("pnl").innerHTML += "Token:\'" + reg[i] + "\'<br />";
    }
}

ParseList('item1, item2, item3');