JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id="newName" value="Doug"/>
<button onclick="closureExample()">closureExample()</button>
<p id="nameList">Abe,Bill,Charlie</p>
JavaScript
function closureExample(){
var names = document.getElementById("nameList").innerHTML.split(','),
name = document.getElementById("newName").value;
names.push(name)
console.log(names);
document.getElementById("nameList").innerHTML = names.toString();
}