57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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var TxtRotate = function(el, toRotate, period) {
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this.toRotate = toRotate;
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this.el = el;
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this.loopNum = 0;
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this.period = parseInt(period, 10) || 2000;
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this.txt = '';
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this.tick();
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this.isDeleting = false;
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};
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TxtRotate.prototype.tick = function() {
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var i = this.loopNum % this.toRotate.length;
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var fullTxt = this.toRotate[i];
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if (this.isDeleting) {
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this.txt = fullTxt.substring(0, this.txt.length - 1);
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} else {
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this.txt = fullTxt.substring(0, this.txt.length + 1);
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}
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this.el.innerHTML = '<span class="wrap">'+this.txt+'</span>';
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var that = this;
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var delta = 300 - Math.random() * 100;
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if (this.isDeleting) { delta /= 2; }
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if (!this.isDeleting && this.txt === fullTxt) {
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delta = this.period;
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this.isDeleting = true;
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} else if (this.isDeleting && this.txt === '') {
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this.isDeleting = false;
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this.loopNum++;
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delta = 500;
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}
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setTimeout(function() {
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that.tick();
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}, delta);
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};
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window.onload = function() {
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var elements = document.getElementsByClassName('txt-rotate');
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for (var i=0; i<elements.length; i++) {
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var toRotate = elements[i].getAttribute('data-rotate');
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var period = elements[i].getAttribute('data-period');
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if (toRotate) {
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new TxtRotate(elements[i], JSON.parse(toRotate), period);
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}
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}
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// INJECT CSS
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var css = document.createElement("style");
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css.type = "text/css";
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css.innerHTML = ".txt-rotate > .wrap { border-right: 0.08em solid #666 }";
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document.body.appendChild(css);
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};
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