javascript实现的燃放烟火效果代码实例
分类：实例代码
本章节分享一段代码实例，它实现了燃放烟火的效果。
效果还算是挺美观的，感兴趣的朋友可以进行分析。
代码实例如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.pipipi.net/" />
<title>前端教程网</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>
</body>
</html>
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