80 lines
2.6 KiB
JavaScript
80 lines
2.6 KiB
JavaScript
(function (window, document, undefined) {
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var hearts = [];
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window.requestAnimationFrame = (function () {
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function (callback) {
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setTimeout(callback, 1000 / 60);
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}
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})();
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init();
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function init() {
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css(".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}");
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attachEvent();
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gameloop();
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}
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function gameloop() {
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for (var i = 0; i < hearts.length; i++) {
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if (hearts[i].alpha <= 0) {
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document.body.removeChild(hearts[i].el);
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hearts.splice(i, 1);
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continue;
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}
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hearts[i].y--;
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hearts[i].scale += 0.004;
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hearts[i].alpha -= 0.013;
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hearts[i].el.style.cssText = "left:" + hearts[i].x + "px;top:" + hearts[i].y + "px;opacity:" + hearts[i].alpha + ";transform:scale(" + hearts[i].scale + "," + hearts[i].scale + ") rotate(45deg);background:" + hearts[i].color;
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}
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requestAnimationFrame(gameloop);
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}
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function attachEvent() {
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var old = typeof window.onclick === "function" && window.onclick;
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window.onclick = function (event) {
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old && old();
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createHeart(event);
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}
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}
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function createHeart(event) {
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var d = document.createElement("div");
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d.className = "heart";
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hearts.push({
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el: d,
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x: event.clientX - 5,
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y: event.clientY - 5,
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scale: 1,
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alpha: 1,
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color: randomColor()
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});
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document.body.appendChild(d);
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}
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function css(css) {
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var style = document.createElement("style");
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style.type = "text/css";
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try {
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style.appendChild(document.createTextNode(css));
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} catch (ex) {
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style.styleSheet.cssText = css;
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}
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document.getElementsByTagName('head')[0].appendChild(style);
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}
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function randomColor() {
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return "rgb(" + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + ")";
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}
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})(window, document);
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