Code case sharing for native js encapsulation of custom scroll bars
This article mainly introduces the relevant knowledge of native js encapsulating custom scroll bars. Has very good reference value. Let's take a look at it with the editor
Recently there was a project about making an online music player, which required the use of a scroll bar, but the built-in scroll bar was too ugly, so I thought about it myself. Custom scroll bars.
I read the principles online, but to be honest I didn’t understand much. I studied it while I was using Android this morning, and I’m pretty satisfied with the results. Then wrap a object.
The method of use is very simple, just customize a p, import this object as a parameter, and just click new. You can also define the style of the scroll bar yourself, just modify the style sheet yourself
Rendering:
## The code is as follows:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<style type="text/css">
p{
padding:0px;
box-sizing:border-box;
margin:0px;
border:0px;
}
#p-5{
width: 700px;
height: 500px;
border:1px solid black;
position: relative;
overflow: hidden;
}
.ribbit-OF-p1{
width: 20px;
background-color: rgb(239, 238, 238);
border:1px solid rgba(0,0,0,0.5);
position: absolute;
right:0px;
top: 0px;
cursor:default;
}
.ribbit-OF-p2{
position: absolute;
top:0px;
right: 0px;
width: 100%;
height: 100px;
background-color:rgba(0,0,0,0.3);
border-radius: 10px;
}
.ribbit-OF-p3{
width: 100%;
height:auto;
background-color: lime;
}
</style>
<body>
<p id="p-1">
<p id="p-2">
</p>
</p>
<p id="p-3"><p id="p-4"></p></p>
<p id="p-5">
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
123123<br/>
qwe<br/>
12asd23<br/>
asd3123<br/>
qwe123<br/>
235423423<br/>
azxc123<br/>
</p>
</body>
<script type="text/javascript">
var p_5 = document.getElementById('p-5');
function OverFlow(element){
this.element = element;
this.ribbit_OF_p1 = document.createElement("p");
this.ribbit_OF_p2 = document.createElement("p");
this.ribbit_OF_p3 = document.createElement("p");
this.createp = function(){
this.ribbit_OF_p1.className = "ribbit-OF-p1";
this.ribbit_OF_p2.className = "ribbit-OF-p2";
this.ribbit_OF_p3.className = "ribbit-OF-p3";
this.ribbit_OF_p3.innerHTML = this.element.innerHTML;
this.element.innerHTML="";
this.element.appendChild(this.ribbit_OF_p3);
this.ribbit_OF_p1.appendChild(this.ribbit_OF_p2);
document.body.appendChild(this.ribbit_OF_p1);
this.ribbit_OF_p1.style.height = getComputedStyle(this.element,null).height;
this.ribbit_OF_p1.style.left = (this.element.offsetLeft+(parseInt(getComputedStyle(this.element,null).width)
-parseInt(getComputedStyle(this.ribbit_OF_p1,null).width)))+"px";
this.ribbit_OF_p1.style.top = this.element.offsetTop+"px";
this.ribbit_OF_p2.style.top = "0px";
}
this.addAudo=function(){
var YY=null;//前鼠标位置
var topXX = 0;//前top位置
var topX = 0;//后top值
var vherght = parseInt(getComputedStyle(this.ribbit_OF_p3,null).height)-parseInt(getComputedStyle(this.element,null).height);//可移动
var dst = 0;
//最大top移动位置
var top_x = parseInt(getComputedStyle(this.ribbit_OF_p1,null).height)-parseInt(getComputedStyle(this.ribbit_OF_p2,null).height);
var thio = this;
window.onmousemove = function(e){
fun(e.clientY);
};
this.ribbit_OF_p2.onmousedown=function(e){
YY = e.clientY;
topXX =parseInt(this.style.top);
return false;
}
window.onmouseup=function(){
YY = null;
return true;
}
function fun(y){
if(top_x>=topX&&topX>=0&&YY!=null){
topX = y-YY+topXX;
if(topX<0)topX=0;
if(topX>top_x)topX=top_x-1;
thio.ribbit_OF_p2.style.top = (topX-1)+"px";
dst = topX*vherght/top_x;
thio.element.scrollTop = dst;
}
}
}
this.createp();
this.addAudo();
}
new OverFlow(p_5);
</script>
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