JSFiddle - React, Tailwind, and code Playground

JavaScript

var formatTime = (function () {
    function addZero(num) {
        return (num >= 0 && num < 10) ? "0" + num : num + "";
    }
    
    return function (dt) {
        var formatted = '';
        
        if (dt) {
            var hours24 = dt.getHours();
            var hours = ((hours24 + 11) % 12) + 1;
            formatted = [formatted, [addZero(hours), addZero(dt.getMinutes())].join(":"), hours24 > 11 ? "pm" : "am"].join(" ");            
        }
        return formatted;
    }
})();


alert(formatTime(new Date()));