How to use css border-top property-CSS Tutorial-php.cn

Home

Web Front-end

CSS Tutorial

How to use css border-top property

silencement

May 26, 2019 pm 02:19 PM

How to use css border-top property

border-top attribute definition and usage

In css, the border-top attribute is a shorthand attribute, which is used to place elements above All properties of the border are defined in one statement. When we want to individually set the display effect of the border on the element, we can use the border-top attribute in CSS to achieve this.

The top border attributes defined by the border-top attribute: border-top-width (top border width), border-top-style (top border style), border-top-color (top border color).

border-top attribute syntax format

css syntax: border-top:border-top-width border-top-style border-top-color; (Example: border-top:1px solid red;)

JavaScript syntax: style.borderTop="border-top-width border-top-style border-top-color";( Example: style.borderTop="border-top:1px solid red;")

Explanation

The border-top attribute has an attribute value that is not set. For example: border-top: solid red; is also possible. However, if the top border style (border-top-style) has not been set before, the second parameter of the border-top attribute is also omitted, and the border-top attribute has no effect. That is to say, to set the display effect of the border, you must define the element border (the default element border is transparent). If you set the color or width of a transparent border, you will not see the display effect.

border-top attribute value description

border-top-width: Set the width of the top border

border-top-style Set the top border Style

border-top-color Set the color of the top border

inherit: Inherit the border-top attribute value from the parent element.

Example

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>css border-top属性设置上边框的显示效果笔记</title>
<style type="text/css">
body{background: #ddd;font-size:20px;}
#a,#b,#c{margin-top:10px;width:300px;}
#a{border-top:1px solid red;}
#b{border-top:solid #FFCCCC;}
#c{border-top:5px solid;}
</style>
</head>
<body>
<div id = "a">border-top:1px solid red;</div>
<div id = "b">border-top:solid #FFCCCC;</div>
<div id = "c">border-top:5px solid;</div>
</body>
</html>

The above is the detailed content of How to use css border-top property. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

A Little Reminder That Pseudo Elements are Children, Kinda.Apr 19, 2025 am 11:39 AM

Here's a container with some child elements:

Menus with 'Dynamic Hit Areas'Apr 19, 2025 am 11:37 AM

Flyout menus! The second you need to implement a menu that uses a hover event to display more menu items, you're in tricky territory. For one, they should

Improving Video Accessibility with WebVTTApr 19, 2025 am 11:27 AM

"The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect."- Tim Berners-Lee

Weekly Platform News: CSS ::marker pseudo-element, pre-rendering web components, adding Webmention to your siteApr 19, 2025 am 11:25 AM

In this week's roundup: datepickers are giving keyboard users headaches, a new web component compiler that helps fight FOUC, we finally get our hands on styling list item markers, and four steps to getting webmentions on your site.

Making width and flexible items play nice togetherApr 19, 2025 am 11:23 AM

The short answer: flex-shrink and flex-basis are probably what you’re lookin’ for.

Position Sticky and Table HeadersApr 19, 2025 am 11:21 AM

You can't position: sticky; a

Weekly Platform News: HTML Inspection in Search Console, Global Scope of Scripts, Babel env Adds defaults QueryApr 19, 2025 am 11:18 AM

In this week's look around the world of web platform news, Google Search Console makes it easier to view crawled markup, we learn that custom properties