这篇文章主要介绍了原生js如何封装自定义滚动条，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
效果图：
代码如下：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<style type="text/css">
div{
padding:0px;
box-sizing:border-box;
margin:0px;
border:0px;
}
#div-5{
width: 700px;
height: 500px;
border:1px solid black;
position: relative;
overflow: hidden;
}
.ribbit-OF-div1{
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-div2{
position: absolute;
top:0px;
right: 0px;
width: 100%;
height: 100px;
background-color:rgba(0,0,0,0.3);
border-radius: 10px;
}
.ribbit-OF-div3{
width: 100%;
height:auto;
background-color: lime;
}
</style>
<body>
<div id="div-1">
<div id="div-2">
</div>
</div>
<div id="div-3"><div id="div-4"></div></div>
<div id="div-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/>
</div>
</body>
<script type="text/javascript">
var div_5 = document.getElementById('div-5');
function OverFlow(element){
this.element = element;
this.ribbit_OF_div1 = document.createElement("div");
this.ribbit_OF_div2 = document.createElement("div");
this.ribbit_OF_div3 = document.createElement("div");
this.createDiv = function(){
this.ribbit_OF_div1.className = "ribbit-OF-div1";
this.ribbit_OF_div2.className = "ribbit-OF-div2";
this.ribbit_OF_div3.className = "ribbit-OF-div3";
this.ribbit_OF_div3.innerHTML = this.element.innerHTML;
this.element.innerHTML="";
this.element.appendChild(this.ribbit_OF_div3);
this.ribbit_OF_div1.appendChild(this.ribbit_OF_div2);
document.body.appendChild(this.ribbit_OF_div1);
this.ribbit_OF_div1.style.height = getComputedStyle(this.element,null).height;
this.ribbit_OF_div1.style.left = (this.element.offsetLeft+(parseInt(getComputedStyle(this.element,null).width)-parseInt(getComputedStyle(this.ribbit_OF_div1,null).width)))+"px";
this.ribbit_OF_div1.style.top = this.element.offsetTop+"px";
this.ribbit_OF_div2.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_div3,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_div1,null).height)-parseInt(getComputedStyle(this.ribbit_OF_div2,null).height);
var thio = this;
window.onmousemove = function(e){
fun(e.clientY);
};
this.ribbit_OF_div2.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_div2.style.top = (topX-1)+"px";
dst = topX*vherght/top_x;
thio.element.scrollTop = dst;
}
}
}
this.createDiv();
this.addAudo();
}
new OverFlow(div_5);
</script>
</html>感谢你能够认真阅读完这篇文章，希望小编分享的“原生js如何封装自定义滚动条”这篇文章对大家有帮助，同时也希望大家多多支持亿速云，关注亿速云行业资讯频道，更多相关知识等着你来学习!
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