js实现滑动进度条

互联网 20-8-21

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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

进度条：

<!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 p{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 p{display:block;font-size:10%;color:#fff;background:#409eff;}  </style> </head> <body>  <p class="progress-bar">  <span class="min-num">0</span>  <span class="max-num">100</span>  <p class="pro-bar"></p>  <p class="block">   <p>0</p>  </p>  </p> </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('p').innerText = percent + '%';   }   };  };  // 鼠标松开移除事件  moveBlock.onmouseup = function(){   document.onmousemove = null;  };  })(); </script> </html>