JS基于面向对象实现的放烟花效果

2024-05-06 16:19:35

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这篇文章主要介绍了JS基于面向对象实现的放烟花效果,涉及javascript面向对象技术的使用技巧,需要的朋友可以参考下

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>