Use css to realize the dynamic gradient color effect of the border, I hope it will be of some help to you.
border.html
<!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>边框</title>
<link rel="stylesheet" href="css/动态边框.css">
</head>
<body>
<div>鼠标移入此处，边框变色</div>
</body>
</html>
Dynamic Border.css
/* 初始状态，注意设置相对定位 */
div {
width: 300px;
height: 100px;
line-height: 100px;
text-align: center;
box-sizing: border-box;
position: relative;
}
/* 渐变色边框 */
div::before {
content: "";
position: absolute;
left: 0;
top: 0;
border-top: 1px solid;
border-left: 1px solid;
border-image: linear-gradient(to bottom, #eda901, #d16cc7) 1 10;
width: 0;
height: 0;
transition: all 0.4s ease-out 0s;
visibility: hidden;
box-sizing: border-box;
}
div::after {
content: "";
position: absolute;
right: 0;
bottom: 0;
border-right: 1px solid;
border-bottom: 1px solid;
border-image: linear-gradient(to bottom, #eda901, #d16cc7) 1 10;
width: 0;
height: 0;
transition: all 0.4s ease-out 0s;
visibility: hidden;
box-sizing: border-box;
}
div:hover::before {
width: 100%;
height: 100%;
visibility: visible;
}
div:hover::after {
width: 100%;
height: 100%;
visibility: visible;
}In fact, it is to add another layer on the original div, which will have a dynamic effect of the border. If there are buttons you want to click in the original div, you can add a relative positioning position: relative; Then give the z-index property a little higher.
This is what it looks like originally:
This is what it looks like after mouseover:
There will also be a frame in the middle that will gradually produce the effect, but I didn't make a gif, so let's just make do with it.