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鼠标特效 出现小爱心

时间:2019-07-15 09:48:33      阅读:95      评论:0      收藏:0      [点我收藏+]

<script type="text/javascript">
 (function(window, document, undefined) {
     var hearts = [];
     window.requestAnimationFrame = (function() {
         return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
         function(callback) {
             setTimeout(callback, 1000 / 60);
         }
     })();
     init();
     function init() {
         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;}");
         attachEvent();
         gameloop();
     }
     function gameloop() {
         for (var i = 0; i < hearts.length; i++) {
             if (hearts[i].alpha <= 0) {
                 document.body.removeChild(hearts[i].el);
                 hearts.splice(i, 1);
                 continue;
             }
             hearts[i].y--;
             hearts[i].scale += 0.004;
             hearts[i].alpha -= 0.013;
             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;
         }
         requestAnimationFrame(gameloop);
     }
    function attachEvent() {
         var old = typeof window.onclick === "function" && window.onclick;
         window.onclick = function(event) {
             old && old();
             createHeart(event);
         }
     }
    function createHeart(event) {
         var d = document.createElement("div");
         d.className = "heart";
         hearts.push({
             el: d,
             x: event.clientX - 5,
             y: event.clientY - 5,
             scale: 1,
             alpha: 1,
             color: randomColor()
         });
         document.body.appendChild(d);
     }
     function css(css) {
         var style = document.createElement("style");
         style.type = "text/css";
         try {
             style.appendChild(document.createTextNode(css));
         } catch(ex) {
             style.styleSheet.cssText = css;
         }
         document.getElementsByTagName(‘head‘)[0].appendChild(style);
     }
     function randomColor() {
         return "rgb(" + (~~ (Math.random() * 255)) + "," + (~~ (Math.random() * 255)) + "," + (~~ (Math.random() * 255)) + ")";
     }
 })(window, document);
 </script>

鼠标特效 出现小爱心

原文:https://www.cnblogs.com/TX-CY/p/11186825.html

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