js 简易版滚动条实例(适用于移动端H5开发)
程序员文章站
2022-05-26 10:57:03
废话不多说，直接上代码
滑动条...</div>
<div class="content">
<p><span style="background-color: #ccffcc"><strong>废话不多说，直接上代码</strong></span></p>
<div class="jb51code">
<pre class="brush: javascript;">
<!doctype html>
<html>
<head>
<title>滑动条</title>
<meta charset="utf-8">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />
<script type="text/javascript" src="./hscoll.js"></script>
</head>
<style>
*{
margin: 0;
padding: 0;
}
#content{
margin-top: 50px;
width:100%;
height: 200px;
background: #eeeeee;
overflow: hidden;
position: relative;
/**transform: translate(0px, -70px);*/
}
#scoll{
overflow: hidden;
}
#content2{
margin-top: 50px;
width:100%;
height: 200px;
background: red;
overflow: hidden;
position: relative;
/**transform: translate(0px, -70px);*/
}
#scoll2{
overflow: hidden;
}
.scrollbars{
position: absolute;
height: 100%;
right: 0;
top: 0;
width: 5px;
border-radius: 5px;
}
.scollb{
position: absolute;
right: 0;
top: 0;
width: 100%;
background: #999999;
border-radius: 5px;
}
</style>
<body>
<div id="content">
<div id="scoll">
<p>1111</p>
<p>2222</p>
<p>3333</p>
<p>4444</p>
<p>5555</p>
<p>6666</p>
<p>7777</p>
<p>8888</p>
<p>9999</p>
<p>0000</p>
<p>aaaa</p>
<p>bbbb</p>
<p>cccc</p>
<p>dddd</p>
<p>eeee</p>
</div>
</div>
</body>
<script>
var options ={
interactivescrollbars:true
}
window.hscoll.buildscoll('content',options);
</script>
</html></pre>
</div>
<p><strong>js代码：</strong></p>
<div class="jb51code">
<pre class="brush: javascript;">
/**
* created by hechao on 2017/6/25.
*/
(function(){
/**添加window对象hscoll属性*/
window.hscoll = {
buildscoll:function(el,options){
app.init(el,options);
}
}
var app = {
/**初始化组件*/
init:function(el,option){
app.options = option;
app.prevy = 0;
app.el = document.getelementbyid(el);
app.scoll = this.el.children[0];
app.h = this.el.offsetheight;//滑动范围高度
app.ch = this.el.scrollheight;//内容的高度
if(parsefloat(this.h)<=parsefloat(this.ch)){
app.sdiv = document.createelement('div');
app.scollb = document.createelement('div');
app.sdiv.setattribute('class','scrollbars');
app.scollb.setattribute('class','scollb');
app.scollb.style.height = parsefloat(this.h)*parsefloat(this.h)/parsefloat(this.ch) + 'px';
app.el.appendchild(this.sdiv);
app.sdiv.appendchild(this.scollb);
app.initevent();
}
},
/**绑定事件*/
initevent:function (){
app.el.addeventlistener('touchstart', app.touchstart, false);
app.el.addeventlistener('touchmove', app.touchmove, false);
app.el.addeventlistener('touchend', app.touchend, false);
},
/**记录滑动初始位置*/
touchstart:function(e){
var point = app.getpoint(e);
app.starty = point.pagey;
},
/**手指移动时，滚动条滚动*/
touchmove:function(e){
e.preventdefault();//阻止默认行为
var point = app.getpoint(e);
app.movey = point.pagey;
app.deltay = app.starty - app.movey;
if((app.prevy - app.deltay)<=0 && (app.prevy - app.deltay)>= -(app.ch-app.h)){
app.domove(app.prevy - app.deltay);
}
if(app.options.interactivescrollbars){
app.domove2(app.prevy - app.deltay);
}else{
if((app.prevy - app.deltay)<=0 && (app.prevy - app.deltay)>= -(app.ch-app.h)){
app.domove2(app.prevy - app.deltay);
}
}
},
/**手指离开时，判断位置*/
touchend:function(e){
app.prevy = app.prevy - app.deltay;
if(app.prevy >= 0){
app.prevy = 0;
app.domove(app.prevy,true);
app.domove2(app.prevy,true);
}
if(app.prevy <= -(app.ch-app.h)){
app.prevy = -(app.ch-app.h);
app.domove(app.prevy,true);
app.domove2(app.prevy,true);
}
},
getpoint:function (e) {
return e.touches ? e.touches[0] : e;
},
/**内容滑动*/
domove:function (y,t){
if(t){
app.scoll.setattribute('style', 'transform: translate(0px, '+y+'px);transition:transform 300ms ease');
}else{
app.scoll.setattribute('style', 'transform: translate(0px, '+y+'px);transition:transform 0ms ease');
}
},
/**滚动条滑动*/
domove2:function(y,t){
if(t){
app.scollb.setattribute('style', 'transform: translate(0px, '+-parsefloat(y)*parsefloat(app.h)/parsefloat(app.ch)+'px);transition:transform 0ms ease;height:'+parsefloat(app.h)*parsefloat(app.h)/parsefloat(app.ch) + 'px'+'');
}else{
app.scollb.setattribute('style', 'transform: translate(0px, '+-parsefloat(y)*parsefloat(app.h)/parsefloat(app.ch)+'px);transition:transform 0ms ease;height:'+parsefloat(app.h)*parsefloat(app.h)/parsefloat(app.ch) + 'px'+'');
}
}
}
})();</pre>
</div>
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