The example in this article describes the JavaScript motion deceleration effect. Share it with everyone for your reference. The details are as follows:
This code can help friends who use JS to engage in game programming. It mainly implements a running deceleration buffer effect. The code is streamlined and very good.
The operation effect is as shown below:
The specific code is as follows:
<!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=gb2312" />
<title>JavaScript运动减速效果</title>
</head>
<body>
<div style=" position:relative; border:1px solid #000000; width:550px; height:50px;">
<div id="aa" style="width:50px; height:50px; background:#930; position:absolute;"></div>
</div>
<div id="x"></div>
<div style=" position:relative; border:1px solid #000000; width:550px; height:50px;">
<div id="bb" style="width:50px; height:50px; background:#0000FF; position:absolute;"></div>
</div>
<div id="y"></div>
<script>
var $ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
var ss = 0;
var s = 500;
var tt = 300;
var a = 2*s/(tt*tt);
var o = $("aa");
var i = 0;
var t = 0;
function run(){
t++;
i = parseInt((a*tt)*t - .5 * a * (t*t));
if(i>=s){ o.style.left = ss + s + "px"; return; }
o.style.left = ss + i + "px";
$("x").innerHTML+=i+",";
setTimeout(run, 10);
}
run();
var s2 = 500;
var o2 = $("bb");
var i2 = 0;
function run2(){
var s = (s2-i2)/100;
if(s>0 && s < 1){ s=1; };
if(s==0 || i2 + s>=s2){ o2.style.left = ss + s2 + "px"; return; }
o2.style.left = ss + i2 + s + "px";
i2=i2 + s;
$("y").innerHTML+=parseInt(i2 + s)+",";
setTimeout(run2, 10);
}
run2();
</script>
</body>
</html>
I hope this article will be helpful to everyone’s JavaScript programming design.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
