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@irazasyed
Forked from anonymous/An-Anonymous-Pen.markdown
Created October 9, 2013 18:44
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An Anonymous Pen

Simple pure JavaScript plugin to rotate text snippets as if they were being typed.

A Pen by Secret Sam on CodePen.

License.

<link href="http://fonts.googleapis.com/css?family=Raleway:200,100,400" rel="stylesheet" type="text/css" />
<h1>This pen is
<span
class="txt-rotate"
data-period="2000"
data-rotate='[ "nerdy.", "simple.", "vanilla JS.", "pretty.", "fun!" ]'></span>
</h1>
<h2>A single &lt;span&gt; is all you need.</h2>
var TxtRotate = 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;
};
TxtRotate.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 = 300 - 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++;
}
setTimeout(function() {
that.tick();
}, delta);
};
window.onload = function() {
var elements = document.getElementsByClassName('txt-rotate');
for (var i=0; i<elements.length; i++) {
var toRotate = elements[i].getAttribute('data-rotate');
var period = elements[i].getAttribute('data-period');
if (toRotate) {
new TxtRotate(elements[i], JSON.parse(toRotate), period);
}
}
};
html,body {
font-family: 'Raleway', sans-serif;
padding: 3em;
font-size: 18px;
background: #222;
color: #aaa
}
h1,h2 {
font-weight: 200;
margin: 0.4em 0;
}
h1 { font-size: 3.5em; }
h2 {
color: #888;
font-size: 2em;
}
/** IMPORTANT STUFF **/
.txt-rotate {
display: inline-block;
text-align: left;
}
.txt-rotate > .wrap {
/** this is the cursor **/
border-right: 0.1em solid #666;
}
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