JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="mylist">
    
</ul>

JavaScript

var appendString = "";
    var dataArray = new Array();
    dataArray[0] = 1;
    dataArray[1] = 2;
    dataArray[2] = 3;
    dataArray[3] = 4;
    
    $.each(dataArray, function(i, val) {
        appendString += '<li id="test' + val + '">ID ' + val + '</li>';
    });
    
$('#mylist').append(appendString);