Script Animasi Teks Mengetik

<h1>
    <span class="text-white typewrite" data-period="2000"
        data-type='[ "Hello World" , "NaFaZ Was Here" , "NO SYSTEM IS SAFE"]'>
        <span class="wrap"></span>
    </span>
</h1>
<script type="text/javascript">
    //=========================================//
    /*/* 11) Typed Text animation (animation) */
    //=========================================//

    try {
        var TxtType = function (el, toRotate, period) {
            this.toRotate = toRotate;
            this.el = el;
            this.loopNum = 0;
            this.period = parseInt(period, 10) || 2000;
            this.txt = '';
            this.tick();
            this.isDeleting = false;
        };

        TxtType.prototype.tick = function () {
            var i = this.loopNum % this.toRotate.length;
            var fullTxt = this.toRotate[i];
            if (this.isDeleting) {
                this.txt = fullTxt.substring(0, this.txt.length - 1);
            } else {
                this.txt = fullTxt.substring(0, this.txt.length + 1);
            }
            this.el.innerHTML = '<span class="wrap">' + this.txt + '</span>';
            var that = this;
            var delta = 200 - Math.random() * 100;
            if (this.isDeleting) { delta /= 2; }
            if (!this.isDeleting && this.txt === fullTxt) {
                delta = this.period;
                this.isDeleting = true;
            } else if (this.isDeleting && this.txt === '') {
                this.isDeleting = false;
                this.loopNum++;
                delta = 500;
            }
            setTimeout(function () {
                that.tick();
            }, delta);
        };

        function typewrite() {
            if (toRotate === 'undefined') {
                changeText()
            }
            else
                var elements = document.getElementsByClassName('typewrite');
            for (var i = 0; i < elements.length; i++) {
                var toRotate = elements[i].getAttribute('data-type');
                var period = elements[i].getAttribute('data-period');
                if (toRotate) {
                    new TxtType(elements[i], JSON.parse(toRotate), period);
                }
            }
            // INJECT CSS
            var css = document.createElement("style");
            css.type = "text/css";
            css.innerHTML = ".typewrite > .wrap { border-right: 0.08em solid transparent}";
            document.body.appendChild(css);
        };
        window.onload(typewrite());
    } catch(err) {

    }
</script>