js实现滑动进度条效果_JavaScript

js实现滑动进度条效果

2021-08-29 16:44#麻辣小龙虾# JavaScript

这篇文章主要为大家详细介绍了js实现滑动进度条效果，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了js实现滑动进度条效果的具体代码，供大家参考，具体内容如下

js实现滑动进度条效果

进度条：

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									<!DOCTYPE html>

									<html>

									<head>

									 <meta charset="utf-8" />

									 <title>js滑动进度条效果</title>

									 <style>

									  *{margin:0;padding:0;user-select:none;}

									  .progress-bar{position:relative;height:10px;width:400px;margin:200px auto;background:#ebeef5;border-radius:10px;}

									  .progress-bar .pro-bar{position:absolute;left:0;height:10px;width:10px;background:#409eff;}

									  .progress-bar .min-num{position:absolute;left:-20px;top:-5px;}

									  .progress-bar .max-num{position:absolute;right:-40px;top:-5px;}

									  .progress-bar .block {position:absolute;height:30px;width:10px;background:#ccc;top:-10px;border-radius:10px;}

									  .progress-bar .block div{position:absolute;display:none;left:-20px;top:-45px;width:50px;height:30px;text-align:center;line-height:30px;background:#ccc;border-radius:20px;}

									  .progress-bar .block:hover div{display:block;font-size:10%;color:#fff;background:#409eff;}

									 </style>

									</head>

									<body>

									 <div class="progress-bar">

									 <span class="min-num">0</span>

									 <span class="max-num">100</span>

									 <div class="pro-bar"></div>

									 <div class="block">

									  <div>0</div>

									 </div>

									 </div>

									</body>

									<script>

									 (function(){

									 let moveBlock = document.querySelector('.block');

									 let proBar = document.querySelector('.pro-bar');

									 let flag = false;

									 let startX = null;

									 let moveMax = (400 - 10); // 背景条宽度减去滑块的宽度

									 moveBlock.onmousedown = function(e){

									  startX = e.pageX;

									  moveBlock.style.left ? moveBlock.style.left : moveBlock.style.left = '0px';

									  let startLeft = parseInt(moveBlock.style.left);

									  document.onmousemove = function(e){

									  let moveX = (e.pageX - startX) > 0 ? true : false;

									  let moveSection = startLeft + (e.pageX - startX);

									  // 限定移动范围

									  if (moveSection >= 0 && moveSection <= moveMax) {

									   let percent = ((startLeft + (e.pageX - startX)) / moveMax).toFixed(4) * 100;

									   percent.toString().length > 5 ? percent = percent.toString().subStr(0, 5) : percent = percent.toString();

									   moveBlock.style.left = startLeft + (e.pageX - startX) + 'px';

									   proBar.style.width = moveBlock.style.left;

									   moveBlock.querySelector('div').innerText = percent + '%';

									  }

									  };

									 };

									 // 鼠标松开移除事件

									 moveBlock.onmouseup = function(){

									  document.onmousemove = null;

									 };

									 })();

									</script>

									</html>