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lineMoving.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>四条线框跟随移动</title>
<style>
*{
padding: 0;
margin: 0;
box-sizing: border-box;
}
body{
background-color: #655643;
}
.container{
display: grid;
width: 90%;
margin: 80px auto;
grid-template-columns: repeat(3, 1fr);
gap: 50px;
position: relative;
}
.item img{
object-fit: cover;
cursor: pointer;
display: block;
}
.pointer{
position: absolute;
--t: 3px; /* 线条的粗细 */
--l: 30px; /* 线条的长度 */
--g: 15px; /* 线条与图片的间隔 */
--w: 0; /* 图片的宽度 */
--h: 0; /* 图片的高度 */
--x: 0px; /* pointer的x轴偏移量 */
--y: 0px; /* pointer的y轴偏移量 */
top: 0;
left: 0;
width: calc(var(--w) + 2 * var(--g));
height: calc(var(--h) + 2 * var(--g));
border: var(--t) solid #fff;
margin-left: calc(var(--g) * -1);
margin-top: calc(var(--g) * -1);
transform: translate(var(--x), var(--y));
transition: 0.6s;
-webkit-mask: conic-gradient(
at var(--l) var(--l), transparent 75%, pink 75% 100%) 0 0 / calc(100% - var(--l)) calc(100% - var(--l))
}
</style>
</head>
<body>
<div class="container">
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/2.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="item">
<img src="../images/1.jpeg" alt="">
</div>
<div class="pointer"></div>
</div>
<script>
const imgs = document.querySelectorAll('img');
const pointer = document.querySelector('.pointer');
for(const img of imgs){
img.addEventListener('mouseenter', (e) => {
const w = img.offsetWidth;
const h = img.offsetHeight;
const x = img.offsetLeft;
const y = img.offsetTop;
pointer.style.setProperty('--w', `${w}px`);
pointer.style.setProperty('--h', `${h}px`);
pointer.style.setProperty('--x', `${x}px`);
pointer.style.setProperty('--y', `${y}px`);
})
}
window.addEventListener('mouseout', function(event) {
if(event.target.tagName === 'IMG') return;
// 在这里执行鼠标离开页面后的操作
pointer.style.setProperty('--w', 0);
pointer.style.setProperty('--h', 0);
pointer.style.setProperty('--x', 0);
pointer.style.setProperty('--y', 0);
});
</script>
</body>
</html>