JSFiddle - React, Tailwind, and code Playground

HTML

<div id="months"></div>

JavaScript

window.onload = function() {
var current = 0;
    var html = '';
    while(current < 12){
      html += getMonth(current++) + '<br />';        
    }
document.getElementById("months").innerHTML = html;
};

function getMonth(month) {
var monthName;
if (month == 0) {
	monthName = "January";
}
if (month == 1) {
	monthName = "February";
}
if (month == 2) {
	monthName = "March";
}
if (month == 3) {
	monthName = "April";
}
if (month == 4) {
	monthName = "May";
}
if (month == 5) {
	monthName = "June";
}
if (month == 6) {
	monthName = "July";
}
if (month == 7) {
	monthName = "August";
}
if (month == 8) {
	monthName = "September";
}
if (month == 9) {
	monthName = "October";
}
if (month == 10) {
	monthName = "November";
}
if (month == 11) {
	monthName = "December";
}
return monthName;
}