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How CSS uses pseudo-classes to control border length

2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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This article introduces the knowledge of "how CSS uses pseudo-classes to control the length of borders". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

What is used here is written by WeChat Mini Programs, so the tag will be view and does not conflict with html.

Html:

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Css:

. swiper-tab {

Width: 100%

Font-family: PingFangSC-Medium

Font-size: 28rpx

Border-bottom: 2rpx solid # F1F1F1

Text-align: center

Height: 88rpx

Line-height: 88rpx

Display: flex

Flex-flow: row

Justify-content: space-between

Background: # ffffff

}

.swiper-tab-item {

Width: 50%

Color: # 252627

}

.active {

Color: # 4876F9

Font-weight: bold

Position: relative

}

The above are the basic styles of the page. To control the length of the border, you need to use: after

Pseudo class css:

.active: after {

Content:''

Position: absolute

Bottom: 0

Height: 6rpx

Width: 100rpx

Background-color: # 4876F9

Left: 50%

Transform: translateX (- 50%)

}

The last two sentences are the problem of controlling the center of the frame.

That's all for "how CSS uses pseudo-classes to control border length". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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