雷迪森安的乡亲们，欢迎来到老实人的前端课堂，上次写了一个新春小盲盒，这大过年的，我把烟花都给你们准备好了，今天我们来写个小烟花吧。
效果展示
注意看有两种模式哦，可以自由切换，鼠标点哪里哪里有烟花，还可以自动放烟花
实现代码
Html
<div id="tips">
<a id="manual" href="javascript:;" rel="external nofollow" rel="external nofollow" >手动放烟花</a>
<a id="auto" href="javascript:;" rel="external nofollow" rel="external nofollow" >自动放烟花</a>
</div>
Css
以下样式大部分是js代码渲染上dom后表现出来的
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;
}
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) { //产生范围在lower~upper的随机数
return Math.floor(Math.random() * (upper - lower + 1) + lower)
},
getRanColor: function () { //随机获得十六进制颜色
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) {
//param即鼠标点击点（即烟花爆炸点）
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) { //烟花上升过程实体初始化
position = "absolute";
//初始位置距网页顶部为：整个网页的高度（处于网页底部）
top = document.documentElement.clientHeight + "px";
left = param.x + "px";
width = "4px";
height = "30px";
borderRadius = "4px";
background = fgm.getRanColor();
};
document.body.appendChild(oEntity);
//window.setInterval方法 该方法使得一个函数每隔固定时间被调用一次
// console.log(param.y);
oEntity.timer = setInterval(function () {
// console.log(oEntity.offsetTop);
// console.log(oEntity.style.top);
oEntity.style.top = oEntity.offsetTop - 20 + "px";
//判断烟花是否上升到或者第一次超过上次鼠标点击位置
if (oEntity.offsetTop <= param.y) {
//烟花爆炸
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)
//产生所有烟花爆炸颗粒实体
for (i = 0; i < len; i++) {
//烟花颗粒形态实体
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++;
//判断烟花爆炸颗粒是否掉落至窗体之外，为真则remove
//splice() 方法可删除从 index 处开始的零个或多个元素
(obj.offsetTop < 0 || obj.offsetLeft < 0 || obj.offsetTop > document.documentElement.clientHeight || obj.offsetLeft > document.documentElement.clientWidth) && (document.body.removeChild(obj), aChip.splice(i, 1))
};
//判断烟花爆炸颗粒是否全部remove，为真则clearInterval(timer);
!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";
//阻止浏览器默认的事件冒泡行为
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
});
关键代码，满满注释哦，这我可够意思了哈，不懂的话再私下问我吧。
到此这篇关于基于Html+CSS+JS实现手动放烟花效果的文章就介绍到这了,更多相关JS放烟花内容请搜索阿兔在线工具以前的文章或继续浏览下面的相关文章希望大家以后多多支持阿兔在线工具！
