How to use CSS3 pseudo-elements to achieve a gradually glowing grid border

Today Xiaobian to share with you how to use CSS3 pseudo-elements to achieve gradually glowing square frame related knowledge points, detailed content, clear logic, I believe most people still know too much about this knowledge, so share this article for everyone to refer to, I hope you have some gains after reading this article, let's learn about it together.

The renderings are as follows:

HTML Code:

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CSS code:

.light{ background: #fff; width: 180px; height: 180px; margin: 100px auto; position: relative; text-align: center; color: #333; transform:translate3d(0,0,0);}.light-inner{ padding: 60px 30px 0; pointer-events: none; position: absolute; left: 0; top: 0; bottom: 0; right: 0; text-align: center; transition: background 0.35s; backface-visibility: hidden;}.light-inner:before, .light-inner:after{ display: block; content: ""; position: absolute; left: 30px; top: 30px; right: 30px; bottom: 30px; border: 1px solid #fff; opacity: 0; transition: opacity 0.35s, transform 0.35s;}.light-inner:before{ border-left: 0; border-right: 0; transform:scaleX(0,1);}.light-inner:after{ border-top: 0; border-bottom: 0; transform: scaleY(1,0);}.light:hover .light-inner{ background: #458fd2}.light:hover .light-inner:before, .light:hover .light-inner:after{ opacity: 1; transform: scale3d(1,1,1);}.light-inner p{ transition: opacity .35s, transform 0.35s; transform: translate3d(0,20px,0); color: #fff; opacity: 0; line-height: 30px;}.light:hover .light-inner p{ transform: translate3d(0,0,0); opacity: 1;}

Implementation steps:

Glowing squares, mainly through.light-inner pseudo-elements:before and:after

The top and bottom borders are spread out from the middle to the sides: scaleX(0) to scaleX(1)

The left and right borders are spread from the center to the top and bottom sides: scaleY(0) to scaleY(1)

This creates an effect where the square gradually glows from the middle to the corners: opacity:0 to opacity:1.

There's nothing else.

Scale Introduction

scale([, ]): Specifies the 2D scale of the object. The first parameter corresponds to the X axis and the second parameter corresponds to the Y axis. If the second parameter is not provided, the value of the first parameter is assumed by default.

scaleX(): Specifies the (horizontal) scaling of the object's X axis

scaleY(): Specifies the (vertical) scaling of the object's Y axis

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