Detailed explanation of CSS web page layout misalignment width calculation instructions-CSS Tutorial-php.cn

Home

Web Front-end

CSS Tutorial

Detailed explanation of CSS web page layout misalignment width calculation instructions

高洛峰

Mar 17, 2017 pm 02:20 PM

Why calculate the width
Calculating the pixel width of the web page is to CSSThe web page layout is neat and compatible. It is common for us to calculate the width of the entire page when we lay out the left and right structural web pages or use padding, margin layout. If we do not calculate the width, no matter whether the width is too large or too small, misalignment problems will occur.

How to calculate CSS width
Example 1: We calculate the layout style of a left and right structure.
If the total width is 400px, then the sum of the left and right should be less than 400px, then we may have 300px on the left and 100px on the right
Correct code:

<head>

< p class="zuo">300px on the left

100px on the right

The above is the correct total width of the left and right structures, which is exactly equal to 400px

Error:
If we keep the total width unchanged, the left side is 300px, and The right side is 120px, so the total width exceeds 20px. Let’s see what problems will occur. The p+CSS code is as follows:

Calculation of left and right structure width www.webjx.com

< p class="zuo">300px on the left

100px on the right

We can see from the picture above that because the total width is about 20px, the left and right structures cannot be flush, and the right side falls down.
In this way, misalignment compatibility issues arise. Generally, in practice, due to our negligence in calculation, the difference is usually 1px-2px when the difference is small, which will not be discovered by us. Therefore, to eliminate misalignment compatibility, we can start with width calculation.

Example 2: There is a 1px border in the left and right structure
Generally, there is a 1px border in the left and right structure, and then some borders are added. When we set the left and right structures, we need to match the border width with the width of the left and right structures. calculated together.
Correct example:
CSS and html code is as follows:

< ;meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
Calculation of left and right structure width www.webjx.com

300px on the left

100px on the right

Because the left and right structures have a width of 1px, you need to subtract the left and right 2 pixel borders each. Width, so the width on the left is 298px and on the right is 98px

If the border is not subtracted, the following effect will be caused:

p+CSSSet percentage width calculation
Sometimes we also need to use percentage to calculate the width. Usually it is also the total percentage width, which cannot exceed 100%

Pay attention to summary when calculating CSS width:
Whether it is a left-right structure, a multi-column layout, or a single p-width layout setting, you need to pay attention to the grasp and calculation of the width, especially when using padding, margin, borders, etc.CSS properties, at this time we all need to calculate the occupied width they set, and firmly grasp that the sum of the widths of the same row is less than or equal to the total width, if it is greater than the total width, it will appear Misplaced compatibility issues. Therefore, when there is general misalignment, we can start by calculating the width. Of course, there are many reasons for misalignment. This is also one of the methods to solve the misalignment compatibility problem.

The above is the detailed content of Detailed explanation of CSS web page layout misalignment width calculation instructions. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

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

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

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

How to fix KB5055523 fails to install in Windows 11?

3 weeks ago By DDD

How to fix KB5055518 fails to install in Windows 10?

3 weeks ago By DDD

Strength Levels for Every Enemy & Monster in R.E.P.O.

3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Roblox: Dead Rails - How To Tame Wolves

3 weeks ago By DDD

Blue Prince: How To Get To The Basement

3 weeks ago By DDD

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial

1655

CakePHP Tutorial

1413

Laravel Tutorial

1306

PHP Tutorial

1252

C# Tutorial

1226

Related knowledge

Google Fonts Variable Fonts Apr 09, 2025 am 10:42 AM

I see Google Fonts rolled out a new design (Tweet). Compared to the last big redesign, this feels much more iterative. I can barely tell the difference

How to Create an Animated Countdown Timer With HTML, CSS and JavaScript Apr 11, 2025 am 11:29 AM

Have you ever needed a countdown timer on a project? For something like that, it might be natural to reach for a plugin, but it’s actually a lot more

HTML Data Attributes Guide Apr 11, 2025 am 11:50 AM

Everything you ever wanted to know about data attributes in HTML, CSS, and JavaScript.

How to select a child element with the first class name item through CSS? Apr 05, 2025 pm 11:24 PM

When the number of elements is not fixed, how to select the first child element of the specified class name through CSS. When processing HTML structure, you often encounter different elements...

Why are the purple slashed areas in the Flex layout mistakenly considered 'overflow space'? Apr 05, 2025 pm 05:51 PM

Questions about purple slash areas in Flex layouts When using Flex layouts, you may encounter some confusing phenomena, such as in the developer tools (d...

A Proof of Concept for Making Sass Faster Apr 16, 2025 am 10:38 AM

At the start of a new project, Sass compilation happens in the blink of an eye. This feels great, especially when it’s paired with Browsersync, which reloads

In front-end development, how to use CSS and JavaScript to achieve searchlight effects similar to Windows 10 settings interface? Apr 05, 2025 pm 10:21 PM

How to implement Windows-like in front-end development...

How We Created a Static Site That Generates Tartan Patterns in SVG Apr 09, 2025 am 11:29 AM

Tartan is a patterned cloth that’s typically associated with Scotland, particularly their fashionable kilts. On tartanify.com, we gathered over 5,000 tartan

See all articles