?前言：效果是鼠标移入空白区域，边框高亮的效果。效果是在douyin的渡一教育袁老师的课程学习到的，观看以后是一个实用的小特效。想看的可以平台查询，自己也学到了知识。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
background: #000;
}
.card-wrap {
display: grid;
margin: 0 auto;
width: 90%;
margin-top: 1em;
color: #f0f0f0;
grid-template-columns: repeat(3, 1fr);
gap: 20px;
text-align: center;
}
.card {
aspect-ratio: 4/3;
border-radius: 8px;
background-color: rgba(255, 255, 255, .1);
position: relative;
overflow: hidden;
}
.card .inner {
position: absolute;
inset: 2px;
background-color: #222;
border-radius: inherit;
display: flex;
align-items: center;
justify-content: center;
z-index: 3;
}
.card::before {
content: "";
position: absolute;
z-index: 2;
top: 0;
left: 0;
inset: 0;
background: radial-gradient(closest-side circle, rgba(255, 255, 255, 0.6) 0%, transparent);
border-radius: inherit;
transform: translate(var(--x, -1000px), var(--y, -1000px));
}
</style>
</head>
<body>
<div class="card-wrap">
<div class="card">
<div class="inner">wish you every success</div>
</div>
<div class="card">
<div class="inner">wish you every success</div>
</div>
<div class="card">
<div class="inner">wish you every success</div>
</div>
<div class="card">
<div class="inner">wish you every success</div>
</div>
<div class="card">
<div class="inner">wish you every success</div>
</div>
<div class="card">
<div class="inner">wish you every success</div>
</div>
</div>
<script>
const cardWrapEl = document.querySelector(".card-wrap")
const cardEls = document.querySelectorAll(".card")
cardWrapEl.onmousemove = function (e) {
for (const card of cardEls) {
// getBoundingClientRect提供了元素的大小及其相对于视口的位置。
const react = card.getBoundingClientRect()
const x = e.clientX - react.left - react.width / 2
const y = e.clientY - react.top - react.height / 2
card.style.setProperty('--x', `${x}px`)
card.style.setProperty('--y', `${y}px`)
}
}
</script>
</body>
</html>