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CSS3 implementation of gradually glowing square border example

小云云

Dec 13, 2017 am 10:53 AM

css css3

This article mainly introduces a code that uses pseudo elements to realize the gradual glow of the border, mainly using the two attributes of scale and opacity. Let’s take a look at the detailed introduction:

HTML code:

## The code is as follows


="light"> Front-end Development Blog< ;/p> Focus on front-end development

CSS code:

The code is as follows

.light{

background:#fff;

width:180px;

height:180px;

margin:100pxauto;

position:relative;

text-align:center;

color:#333;

transform:translate3d(0 ,0,0);

}

.light-inner{

padding:60px30px0;

pointer-events: none;

position:absolute;

left:0;

top:0;

bottom:0;

right: 0;

text-align:center;

transition: background0.35s;

backface-visibility:hidden;

}

.light-inner:before, .light-inner:after{

display:block;

content:"";

position:absolute;

left:30px;

top:30px;

right:30px;

bottom:30px;

border:1pxsolid#fff;

opacity:0;

transition: opacity0.35s, transform0.35s;

}

.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, transform0.35s;

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:

The luminous square is mainly realized through the pseudo elements of .light-inner: before and :after.

The upper and lower borders are from The middle is gradually expanded to both sides: scaleX(0) to scaleX(1)

The left and right borders are expanded from the middle to the upper and lower sides: scaleY(0) to scaleY(1)

to form a The effect of a square gradually glowing from the center to the corners: opacity:0 to opacity:1.

There are no other skills.

scale introduction

scale(

scaleX(

scaleY(

Related recommendations:

Explanation on how to set the border, background and size of elements in CSS3

Detailed explanation of examples of using css to achieve multiple border effects on a single element

css How to set a translucent border in

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