js实现兼容PC端和移动端滑块拖动选择数字效果
程序员文章站
2023-11-14 22:41:34
本文为大家分享了js实现移动端滑块拖动选择数字的效果，可以通过鼠标拖拽滑动效果来选择数字，供大家参考，具体内容如下
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本文为大家分享了js实现移动端滑块拖动选择数字的效果，可以通过鼠标拖拽滑动效果来选择数字，供大家参考，具体内容如下
<!doctype html>
<html lang="zh-cn">
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<title>鼠标拖动小方块</title>
<style type="text/css">
.linediv {
position: relative;
height: 5px;
background: red;
width: 300px;
margin: 50px auto;
}
.linediv .mindiv {
position: absolute;
top: -5px;
left: 0;
width: 15px;
height: 15px;
background: green;
cursor: pointer
}
.linediv .mindiv .vals {
position: absolute;
font-size: 20px;
top: -45px;
left: -10px;
width: 35px;
height: 35px;
line-height: 35px;
text-align: center;
background: blue;
}
.linediv .mindiv .vals:after {
content: "";
width: 0px;
height: 0px;
border-top: 6px solid blue;
border-left: 6px solid transparent;
border-right: 6px solid transparent;
border-bottom: 6px solid transparent;
display: block;
margin-left: 11px;
}
</style>
</head>
<body>
<center>
<h3>用鼠标拖动小方块<span id="msg">0</span>%</h3>
</center>
<div id="linediv" class="linediv">
<div id="mindiv" class="mindiv">
<div id="vals" class="vals">0</div>
</div>
</div>
<script>
window.onload = function() {
var linediv = document.getelementbyid('linediv'); //长线条
var mindiv = document.getelementbyid('mindiv'); //小方块
var msg = document.getelementbyid("msg");
var vals = document.getelementbyid("vals");
var ifbool = false; //判断鼠标是否按下
//事件
var start = function(e) {
e.stoppropagation();
ifbool = true;
console.log("鼠标按下")
}
var move = function(e) {
console.log("鼠标拖动")
if(ifbool) {
if(!e.touches) { //兼容移动端
var x = e.clientx;
} else { //兼容pc端
var x = e.touches[0].pagex;
}
//var x = e.touches[0].pagex || e.clientx; //鼠标横坐标var x
var linediv_left = getposition(linediv).left; //长线条的横坐标
var mindiv_left = x - linediv_left; //小方块相对于父元素（长线条）的left值
if(mindiv_left >= linediv.offsetwidth - 15) {
mindiv_left = linediv.offsetwidth - 15;
}
if(mindiv_left < 0) {
mindiv_left = 0;
}
//设置拖动后小方块的left值
mindiv.style.left = mindiv_left + "px";
msg.innertext = parseint((mindiv_left / (linediv.offsetwidth - 15)) * 100);
vals.innertext = parseint((mindiv_left / (linediv.offsetwidth - 15)) * 100);
}
}
var end = function(e) {
console.log("鼠标弹起")
ifbool = false;
}
//鼠标按下方块
mindiv.addeventlistener("touchstart", start);
mindiv.addeventlistener("mousedown", start);
//拖动
window.addeventlistener("touchmove", move);
window.addeventlistener("mousemove", move);
//鼠标松开
window.addeventlistener("touchend", end);
window.addeventlistener("mouseup", end);
//获取元素的绝对位置
function getposition(node) {
var left = node.offsetleft; //获取元素相对于其父元素的left值var left
var top = node.offsettop;
current = node.offsetparent; // 取得元素的offsetparent
// 一直循环直到根元素
while(current != null) {
left += current.offsetleft;
top += current.offsettop;
current = current.offsetparent;
}
return {
"left": left,
"top": top
};
}
}
</script>
</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。