Method: First use the border attribute in the element to define the border; then use the "box-sizing:border-box" statement to set the inner border. The box-sizing attribute is used to define certain elements in a certain way to fit within a specified area; when the value is set to "border-box" the inner border can be defined.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
css setting inner border
In CSS, you can use the border attribute together with the box-sizing attribute to add an inner border.
The border attribute is used to add a border
The box-sizing attribute is used to define certain elements in a certain way to fit in the specified area; Set the property value to the border-box value to add an inner border.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
div.container {
width: 30em;
border: 1em solid;
}
div.box1 {
width: 50%;
border: 1em solid red;
float: left;
}
div.box2 {
box-sizing: border-box;
-moz-box-sizing: border-box;
/* Firefox */
width: 50%;
border: 1em solid red;
float: left;
}
</style>
</head>
<body>
<div class="container">
<div class="box1">普通边框！！</div>
<div class="box2">内边框！！</div>
</div>
</body>
</html>Rendering:
Description: box-sizing attribute
The box-sizing property allows you to define specific elements that match a certain area in a specific way.
For example, if you need to place two bordered boxes side by side, you can do this by setting box-sizing to "border-box". This causes the browser to render a box with the specified width and height, and put the borders and padding into the box.
Property value:
content-box: This is the behavior of width and height specified by CSS2.1. Specifying the element's width and height (min/max properties) applies to the box's width and height. Pad and border layout and drawing of elements except specified width and height
border-box: Specify width and height (min/max properties) to determine the element border. That is, specifying the width and height of an element includes padding and border. The width and height of the content are obtained by subtracting the border and padding from the set width and height respectively.
(Learning video sharing: css video tutorial)
The above is the detailed content of How to set the inner border in css. For more information, please follow other related articles on the PHP Chinese website!
Weekly Platform News: Web Apps in Galaxy Store, Tappable Stories, CSS SubgridApr 14, 2025 am 11:20 AMIn this week's roundup: Firefox gains locksmith-like powers, Samsung's Galaxy Store starts supporting Progressive Web Apps, CSS Subgrid is shipping in Firefox
Weekly Platform News: Internet Explorer Mode, Speed Report in Search Console, Restricting Notification PromptsApr 14, 2025 am 11:15 AMIn this week's roundup: Internet Explorer finds its way into Edge, Google Search Console touts a new speed report, and Firefox gives Facebook's notification
The Power (and Fun) of Scope with CSS Custom PropertiesApr 14, 2025 am 11:11 AMYou’re probably already at least a little familiar with CSS variables. If not, here’s a two-second overview: they are really called custom properties, you set
We Are ProgrammersApr 14, 2025 am 11:04 AMBuilding websites is programming. Writing HTML and CSS is programming. I am a programmer, and if you're here, reading CSS-Tricks, chances are you're a
How Do You Remove Unused CSS From a Site?Apr 14, 2025 am 10:59 AMHere's what I'd like you to know upfront: this is a hard problem. If you've landed here because you're hoping to be pointed at a tool you can run that tells
An Introduction to the Picture-in-Picture Web APIApr 14, 2025 am 10:57 AMPicture-in-Picture made its first appearance on the web in the Safari browser with the release of macOS Sierra in 2016. It made it possible for a user to pop
Ways to Organize and Prepare Images for a Blur-Up Effect Using GatsbyApr 14, 2025 am 10:56 AMGatsby does a great job processing and handling images. For example, it helps you save time with image optimization because you don’t have to manually
Oh Hey, Padding Percentage is Based on the Parent Element's WidthApr 14, 2025 am 10:55 AMI learned something about percentage-based (%) padding today that I had totally wrong in my head! I always thought that percentage padding was based on the
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 Chinese version
Chinese version, very easy to use
SublimeText3 Mac version
God-level code editing software (SublimeText3)
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
Dreamweaver Mac version
Visual web development tools
PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
