This article describes the method of pure JS to simulate elastic motion of div layer. Share it for your reference. The details are as follows:
characteristic:
1. Supports customization of various constants
2. Theory supports all elements, just modify it, you understand
3. Known support browsers: chrome/firefox/IE7, 8, 9
<html>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<script type="text/javascript">
var a=900;//Maximum distancevar b;//Timer variablevar c=-1;//Next click on the direction of motion -1 Negative motion 1 Positive motionvar d=2; //Rebound constant The larger the value, the smaller the elasticity. Take the value d>1var e=-1; //The current direction of movementvar f=a; //Current locationvar g=0; //One-directional movement timevar h; //Elastomervar i=15;//The greater the movement speed, the slower the movementfunction Bounce(id){
h=(id);
//End unfinished motion if(b)clearInterval(b);
//Reset time g=0;
c=-1*c; //Next click on the movement direction to change b=setInterval('move()',i);
}
function move(){
if(c==1){
if(e==-1){
if(f-(2*g-1)>0){
f=f-(2*g-1);
g++;
}else{
e=1;
f=1;
g++;
g=parseInt(g/d);
g=g%2==0?(g+1):g;
if(g==3)clearInterval(b);
}
}else{
if(g>0){
g--;
f=f+2*g-1;
}else{
e=-1;
g=0;
}
}
=()+"px";
}else{
if(e==1){
if(f+(2*g-1)<a){
f=f+(2*g-1);
g++;
}else{
e=-1;
f=a;
g++;
g=parseInt(g/d);
g=g%2==0?(g+1):g;
if(g==1)clearInterval(b);
}
}else{
if(g>0){
g--;
f=f-(2*g-1);
}else{
e=1;
g=0;
}
}
=()+"px";
}
}
</script>
</head>
<body>
<div style="color:red;font-size:12px;text-align:center;">
<div style="text-align:left;color:green;margin:50px 300px;">
characteristic：<br> * Supports customization of various constants <br> * Theory supports all elements，Just modify，You understand<br> * Known support for browsers：chrome/firefox/IE7、8、9
</div>
</div>
<input type="button" value="click me" onClick="Bounce('test');" style="text-align:center;border:1px #ccc solid;padding:5px 10px;margin:0px 200px 100px 200px;"/>
<div style="width:900px;height:200px;margin:0px 200px;background-color:#e8e8e8;border:1px #ccc solid;" onClick="Bounce('test');"></div>
</body>
</html>
I hope this article will be helpful to everyone's JavaScript programming.