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JavaScript mouse Follow effect code and understanding

Source: Internet
Author: User
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JavaScript mouse Follow effects


<! DOCTYPE html>

lang= "en" >


<meta CharSet= "UTF-8" >

<title> </title>

<style>

*{

margin:0;

padding:0;

}

body{

height:1000px;

}

div{

width:50px;

height:50px;



background:red;

-webkit-border-radius:50%;

-moz-border-radius:50%;

border-radius:50%;

Text-align:center;

Position:absolute;

top:0;

left:0;

line-height:50px;



}

</style>


<body>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<div> </div>

<script>

var odiv=document.getelementsbytagname (' div ');

Document.onmousemove=function (e) {

E equals Mouse Object

e=e | | window.event;

var maxx=window.innerwidth-odiv[0].offsetwidth-18;

var maxy=window.innerheight-odiv[0].offsetheight-18; Browser width-No. 0 box-width of scroll bar

var Sjyr=math.floor (Math.random () *255);

var Sjyg=math.floor (Math.random () *255);

var Sjyb=math.floor (Math.random () *255);

var Scrolltop=document.documentelement.scrolltop | | Document.body.scrollTop;

if (E.clientx>maxx) {

odiv[0].style.left=maxx+ ' px ';

}else{

odiv[0].style.left= e.clientx+ ' px ';

}

if (E.clienty>maxy) {

odiv[0].style.top=maxy+ ' px ';

}else{

odiv[0].style.top= e.clienty+scrolltop+ ' px ';

}

for (Var i=odiv.length-1;i>0;i--) {//for loop lets Div follow his previous

Odiv[i].style.left = Odiv[i-1].style.left;

Odiv[i].style.top = Odiv[i-1].style.top;

odiv[i].style[' backgroundcolor '] = odiv[i-1].style[' backgroundcolor '];





}//the latter follows a DIV in front

The distance the scroll bar scrolls;



Odiv[0].style.backgroundcolor= ' rgb (' +sjyr+ ', "+sjyg+", "+sjyb+ ') ';







/* odiv[0].style.left= e.clientx+ ' px ';

odiv[0].style.top= e.clienty+scrolltop+ ' px '; */

E.clientx mouse X distance from browser edge how many pixels

E.clienty mouse Y distance from browser edge how many pixels

}

</script>

</body>


Here are the pictures:


JavaScript mouse Follow effect code and understanding

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