JS基于面向对象实现的放烟花效果

2019-11-20 12:32:10

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本文实例讲述了JS基于面向对象实现的放烟花效果。分享给大家供大家参考。具体实现方法如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>js放烟花效果（面向对象版）</title><style type="text/css">html,body{overflow:hidden;}body,div,p{margin:0;padding:0;}body{background:#000;font:12px/1.5 arial;color:#7A7A7A;}a{text-decoration:none;outline:none;}#tips,#copyright{position:absolute;width:100%;height:50px;text-align:center;background:#171717;border:2px solid #484848;}#tips{top:0;border-width:0 0 2px;}#tips a{font:14px/30px arial;color:#FFF;background:#F06;display:inline-block;margin:10px 5px 0;padding:0 15px;border-radius:15px;}#tips a.active{background:#FE0000;}#copyright{bottom:0;line-height:50px;border-width:2px 0 0;}#copyright a{color:#FFF;background:#7A7A7A;padding:2px 5px;border-radius:10px;}#copyright a:hover{background:#F90;}p{position:absolute;top:55px;width:100%;text-align:center;}</style><script type="text/javascript">var fgm = { on: function(element, type, handler) { return element.addEventListener ? element.addEventListener(type, handler, false) : element.attachEvent("on" + type, handler) }, un: function(element, type, handler) { return element.removeEventListener ? element.removeEventListener(type, handler, false) : element.detachEvent("on" + type, handler) }, bind: function(object, handler) { return function() {  return handler.apply(object, arguments)  }  }, randomRange: function(lower, upper) { return Math.floor(Math.random() * (upper - lower + 1) + lower)  }, getRanColor: function() { var str = this.randomRange(0, 0xFFFFFF).toString(16); while(str.length < 6) str = "0" + str; return "#" + str  }};//初始化对象function FireWorks() { this.type = 0; this.timer = null; this.fnManual = fgm.bind(this, this.manual)}FireWorks.prototype = { initialize: function() { clearTimeout(this.timer); fgm.un(document, "click", this.fnManual); switch(this.type) {  case 1:  fgm.on(document, "click", this.fnManual);  break;  case 2:  this.auto();  break; }; }, manual: function(event) { event = event || window.event; this.__create__({  x: event.clientX,  y: event.clientY  }); }, auto: function () { var that = this; that.timer = setTimeout(function() {    that.__create__({  x: fgm.randomRange(50, document.documentElement.clientWidth - 50),  y: fgm.randomRange(50, document.documentElement.clientHeight - 150)  })   that.auto(); }, fgm.randomRange(900, 1100)) }, __create__: function (param) { var that = this; var oEntity = null; var oChip = null; var aChip = []; var timer = null; var oFrag = document.createDocumentFragment(); oEntity = document.createElement("div"); with(oEntity.style) {  position = "absolute";  top = document.documentElement.clientHeight + "px";  left = param.x + "px";  width = "4px";  height = "30px";  borderRadius = "4px";  background = fgm.getRanColor(); }; document.body.appendChild(oEntity); oEntity.timer = setInterval(function() {  oEntity.style.top = oEntity.offsetTop - 20 + "px";  if(oEntity.offsetTop <= param.y) {  clearInterval(oEntity.timer);  document.body.removeChild(oEntity);  (function() {   //在50-100之间随机生成碎片   //由于IE浏览器处理效率低, 随机范围缩小至20-30   //自动放烟花时, 随机范围缩小至20-30   var len = (/msie/i.test(navigator.userAgent) || that.type == 2) ? fgm.randomRange(20, 30) : fgm.randomRange(50, 100)      for (i = 0; i < len; i++) {   oChip = document.createElement("div");   with(oChip.style) {    position = "absolute";    top = param.y + "px";    left = param.x + "px";    width = "4px";    height = "4px";    overflow = "hidden";    borderRadius = "4px";    background = fgm.getRanColor();     };   oChip.speedX = fgm.randomRange(-20, 20);   oChip.speedY = fgm.randomRange(-20, 20);   oFrag.appendChild(oChip);   aChip[i] = oChip   };   document.body.appendChild(oFrag);   timer = setInterval(function() {   for(i = 0; i < aChip.length; i++) {    var obj = aChip[i];    with(obj.style) {    top = obj.offsetTop + obj.speedY + "px";    left = obj.offsetLeft + obj.speedX + "px";    };    obj.speedY++;    (obj.offsetTop < 0 || obj.offsetLeft < 0 || obj.offsetTop > document.documentElement.clientHeight || obj.offsetLeft > document.documentElement.clientWidth) && (document.body.removeChild(obj), aChip.splice(i, 1))   };   !aChip[0] && clearInterval(timer);   }, 30)  })()  } }, 30) }};fgm.on(window, "load", function() { var oTips = document.getElementById("tips"); var aBtn = oTips.getElementsByTagName("a"); var oFireWorks = new FireWorks(); fgm.on(oTips, "click", function(event) { var oEvent = event || window.event; var oTarget = oEvent.target || oEvent.srcElement; var i = 0; if(oTarget.tagName.toUpperCase() == "A") {  for(i = 0; i < aBtn.length; i++) aBtn[i].className = "";  switch(oTarget.id) {  case "manual":   oFireWorks.type = 1;   break;  case "auto":   oFireWorks.type = 2;   break;  case "stop":   oFireWorks.type = 0;   break;  }  oFireWorks.initialize();  oTarget.className = "active";  oEvent.stopPropagation ? oEvent.stopPropagation() : oEvent.cancelBubble = true } });});fgm.on(document, "contextmenu", function(event) { var oEvent = event || window.event; oEvent.preventDefault ? oEvent.preventDefault() : oEvent.returnValue = false});</script></head><body><div id="tips"><a id="manual" href="javascript:;">手动放烟花</a><a id="auto" href="javascript:;">自动放烟花</a><a id="stop" href="javascript:;">停止放烟花</a></div><p>由于浏览器渲染能力有限, 当浏览器为IE或选择自动放烟花时, 随机生成的烟花碎片范围自动调整至20-30</p><div id="copyright">建议使用Firefox, Chrome浏览器预览效果. By ― Ferris, QQ:21314130</div></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

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