发布于 2017-01-24 09:17:25 | 140 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
本文实例讲述了JS实现超炫网页烟花动画效果的方法。分享给大家供大家参考。具体分析如下：
非常炫的使用JS实现的一个网页烟花燃放动画效果，能适应JS做出这样的动画来
<!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>
<title>超炫网页烟花效果</title>
</head>
<style type="text/css">
.fire{display:block; overflow:hidden; font-size:12px; position:absolute};
body{overflow:hidden; background:#000}
html{overflow:hidden; background:#000}
</style>
<body>
</body>
<script type="text/javascript">
var Fire = function(r, color) {
this.radius = r || 12;
this.color = color;
this.xpos = 0;
this.ypos = 0;
this.zpos = 0;
this.vx = 0;
this.vy = 0;
this.vz = 0;
this.mass = 1;
this.x =0;
this.y=0;
this.p = document.createElement("span");
this.p.className = "fire";
this.p.innerHTML = "*";
this.p.style.fontSize = this.radius + "px";
this.p.style.color = "#" + this.color;
}
Fire.prototype = {
append: function(parent) {
parent.appendChild(this.p);
},
setSize: function(scale) {
this.p.style.fontSize = this.radius * scale + "px";
},
setPosition:function(x, y) {
this.p.style.left = x + "px";
this.p.style.top = y + "px";
},
setVisible: function(b) {
this.p.style.display = b ? "block" : "none";
}
}
var fireworks = function() {
var fires = new Array();
var count = 150;
var fl = 250;
var vpx = 500;
var vpy = 300;
var gravity = .5;
var floor = 200;
var bounce = -.8;
var timer;
var wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
var wpos = 0;
var wcount;
return {
init: function() {
wcount = 50 + Math.floor(Math.random() * 100);
for (var i=0; i<count; i++) {
var color = 0xFF0000;
color = (Math.random() * 0xFFFFFF).toString(16).toString().split(".")[0];
while(color.length < 6) {
color = "0" + color;
}
var fire = new Fire(12, color);
fires.push(fire);
fire.ypos = -100;
fire.vz = Math.random() * 6 - 3;
fire.vx = (Math.random()*2 - 1)*2 ;
fire.vy = Math.random()*-15 - 15;
fire.x = 500
fire.y = 600;
fire.append(document.body);
}
var that = this;
timer = setInterval(function() {
wpos++;
if (wpos >= wcount) {
wpos = 0;
wcount = 50 + Math.floor(Math.random() * 100);
wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
}
for (var i=0;i<count; i++) {
that.move(fires[i]);
}
}, 30);
},
move: function(fire) {
fire.vy += gravity;
fire.x += fire.vx;
fire.y += fire.vy;
fire.vx += wind;
fire.setPosition(fire.x, fire.y);
if (fire.x < 0 || fire.x >1000 || fire.y < 0 || fire.y > 600) {
fire.vx = (Math.random()*2 - 1)*2;
fire.vy = Math.random()*-15 - 15;
fire.x = 500;
fire.y = 600;
fire.setPosition(fire.x, fire.y);
}
}
}
}
fireworks().init();
</script>
</html>希望本文所述对大家的javascript程序设计有所帮助。