给大家分享一个用原生JS实现的拖动拉开序幕特效，效果如下：
以下是代码实现，欢迎大家复制粘贴和收藏。
代码语言：javascript复制<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>原生JS实现拖动拉开序幕特效</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
display: flex;
align-items: center;
justify-content: center;
min-height: 100vh;
background: #151515;
}
div {
position: relative;
}
#rangeValue {
position: relative;
display: block;
font-size: 6em;
color: rgba(0, 0, 0, 0.8);
z-index: 2;
text-align: center;
}
#rangeValue::after {
content: '%';
}
#fillRangeValue {
position: fixed;
top: 0;
left: 0;
height: 100%;
width: 0;
background: #00adff;
z-index: 1;
}
.range {
position: relative;
width: 400px;
height: 15px;
-webkit-appearance: none;
background: rgba(0, 0, 0, 0.8);
outline: none;
border-radius: 15px;
box-shadow: 0 0 0 2px #151515, inset 0 0 5px #000;
z-index: 2;
overflow: hidden;
}
.range::-webkit-slider-thumb {
-webkit-appearance: none;
width: 15px;
height: 15px;
border-radius: 50%;
background: #00adff;
border: 4px solid #222;
z-index: 2;
box-shadow: -407px 0 0 400px #00adff;
}
</style>
</head>
<body>
<div>
<h2 id="rangeValue"></h2>
<div id="fillRangeValue"></div>
<input type="range" class="range" value="0" min="0" max="100" onmousemove="rangeSlider(this.value)"
onchange="rangeSlider(this.value)">
</div>
<script>
function rangeSlider(value) {
document.getElementById('rangeValue').innerHTML = value
document.getElementById('fillRangeValue').style.width = `${value}%`
}
</script>
</body>
</html>
