原生js 移动端可拖拽的进度条
效果图:
代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>干货-课程-完成</title>
<style>
ul.lanren{
margin:100px auto;
}
.scale_panel{
color:#999;
position:absolute;
line-height:18px;
left:60px;top:-0px;
}
.scale_panel>span:first-child{
position: absolute;
left: -5rem;
font-size: 2rem;
}
.scale_panel>span:nth-child(2){
position: absolute;
right: -5rem;
font-size: 2rem;
}
.scale>span{
background-color: red;
3rem;
height:3rem;
position:absolute;
left:-2px;top:-15px;
cursor:pointer;
border-radius: 50%;
font-size: 2rem;
}
.scale{
background-repeat: repeat-x;
background-position: 0 100%;
background-image: linear-gradient(to right,#08D7F2 0%,#2BF06A 50%,#2BF06A 50%,#FC6076 100%);
border-left: 1px #83BBD9 solid;
43rem;
height: 1rem;
position: relative;
border-radius: 2rem;
}
.scale>div{
background-repeat: repeat-x;
background-color: red; /*进度条颜色*/
0px;
position: absolute;
height: 1rem;
0; left: 0; bottom: 0;
border-radius: 2rem;
}
.lanren>li{
margin-left: 3.5rem;
position:relative;
list-style:none;
font-size: 3rem;
}
#title{
position: absolute;
top: -6rem;
left: 23rem;
}
</style>
</head>
<body>
<!-- 可拖拽进度条 -->
<ul class="lanren">
<li><span id="title">0</span>
<div class="scale_panel">
<span class="f-left">吃力</span>
<span class="f-right">轻松</span>
<div class="scale" id="bar">
<div></div>
<span id="btn"></span>
</div>
</div>
</li>
</ul>
<script src="js/jquery-3.2.1.min.js"></script>
<script>
// 进度条代码
var scale = function (btn,bar,title){
this.btn=document.getElementById(btn);
this.bar=document.getElementById(bar);
this.title=document.getElementById(title);
this.step=this.bar.getElementsByTagName("div")[0];
this.init();
};
scale.prototype={
init:function (){
var f=this,g=document,b=window,m=Math;
f.btn.ontouchstart=function (e){
var x=(e||b.event).touches[0].clientX;
var l=this.offsetLeft;
var max=f.bar.offsetWidth-this.offsetWidth;
g.ontouchmove=function (e){
var thisX=(e||b.event).touches[0].clientX;
var to=m.min(max,m.max(-2,l+(thisX-x)));
f.btn.style.left=to+'px';
f.ondrag(m.round(m.max(0,to/max)*100),to);
b.getSelection ? b.getSelection().removeAllRanges() : g.selection.empty();
};
g.ontouchend=new Function('this.onmousemove=null');
};
},
ondrag:function (pos,x){
this.step.style.width=Math.max(0,x)+'px';
this.title.innerHTML=pos+'%';
}
}
new scale('btn','bar','title');
// });
</script>
</body>
</html>