JS實現商品櫥窗特效
阿新 • • 發佈：2020-01-10
本文例項為大家分享了JS實現商品櫥窗特效的具體程式碼，供大家參考，具體內容如下
知識點
換算公式
① 滾動條長度 = ( 盒子的寬度 / 內容的寬度) * 盒子的寬度
滾動條長度/盒子的長度 = 盒子的長度/內容的長度
② 內容走的距離 = （內容的長度 - 盒子的長度）/ （盒子的長度 - 滾動條的長度）* 滾動條走的距離
執行效果
程式碼
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
*{
margin: 0;
padding: 0;
list-style: none;
border:none;
}
#box{
width: 800px;
height: 200px;
border: 1px solid #ddd;
position: relative;
margin: 100px auto;
overflow: hidden;
}
#box ul{
width: 5200px;
position: absolute;
left: 0;
top: 20px;
}
#box ul li{
float: left;
}
#box_bottom{
position: absolute;
left: 0;
bottom: 0;
background-color: #e8e8e8;
width: 100%;
height: 25px;
}
.mask{
position: absolute;
left: 0;
top:0;
height: 25px;
background-color: orangered;
border-radius: 12px;
cursor: pointer;
}
</style>
</head>
<body>
<div id="box">
<ul id="box_top">
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img3.jpg" alt=""></li>
<li><img src="images/img4.jpg" alt=""></li>
<li><img src="images/img5.jpg" alt=""></li>
<li><img src="images/img6.jpg" alt=""></li>
<li><img src="images/img7.jpg" alt=""></li>
<li><img src="images/img8.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img3.jpg" alt=""></li>
<li><img src="images/img4.jpg" alt=""></li>
<li><img src="images/img5.jpg" alt=""></li>
<li><img src="images/img6.jpg" alt=""></li>
<li><img src="images/img7.jpg" alt=""></li>
<li><img src="images/img8.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img3.jpg" alt=""></li>
<li><img src="images/img4.jpg" alt=""></li>
<li><img src="images/img5.jpg" alt=""></li>
<li><img src="images/img6.jpg" alt=""></li>
<li><img src="images/img7.jpg" alt=""></li>
<li><img src="images/img8.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
<li><img src="images/img3.jpg" alt=""></li>
<li><img src="images/img4.jpg" alt=""></li>
<li><img src="images/img5.jpg" alt=""></li>
<li><img src="images/img6.jpg" alt=""></li>
<li><img src="images/img7.jpg" alt=""></li>
<li><img src="images/img8.jpg" alt=""></li>
<li><img src="images/img1.jpg" alt=""></li>
<li><img src="images/img2.jpg" alt=""></li>
</ul>
<div id="box_bottom">
<span class="mask"></span>
</div>
</div>
<script>
window.onload = function () {
// 1. 獲取需要的標籤
var box = document.getElementById("box");
var box_top = document.getElementById("box_top");
var box_bottom = document.getElementById("box_bottom");
var mask = box_bottom.children[0];
// 2. 設定滾動條的長度
// 滾動條長度 = ( 盒子的寬度 / 內容的寬度) * 盒子的寬度
var mask_len = (box.offsetWidth / box_top.offsetWidth) * box.offsetWidth;
mask.style.width = mask_len + 'px';
// 3. 滑鼠操作
mask.onmousedown = function (event) {
var e = event || window.event;
// 3.1 求出初始值
var beginX = e.clientX - mask.offsetLeft;
// 3.2 移動
document.onmousemove = function (event) {
var e = event || window.event;
// 3.3 求出移動的距離
var endX = event.clientX - beginX;
// 邊界值
if(endX < 0){
endX = 0;
}else if(endX >= box.offsetWidth - mask.offsetWidth){
endX = box.offsetWidth - mask.offsetWidth;
}
// 3.4 動起來
mask.style.left = endX + 'px';
// 內容走的距離 = （內容的長度 - 盒子的長度）/ （盒子的長度 - 滾動條的長度）* 滾動條走的距離
var content_len = (box_top.offsetWidth - box.offsetWidth) / (box.offsetWidth - mask.offsetWidth) * endX;
box_top.style.left = -content_len + 'px';
return false;
};
document.onmouseup = function () {
document.onmousemove = null;
}
}
}
</script>
</body>
</html>以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。