search
HomeWeb Front-endCSS TutorialHow to write css style comments

How to write css style comments

Apr 21, 2021 pm 04:49 PM
cssComment

In CSS, whether a multi-line comment or a single-line comment, it must start with "/*" and end with "*/", with the comment content added in the middle; the syntax format is "/* Content to be commented* /". The "*" symbol should not be placed next to the comment content, and at least one space must be left empty.

How to write css style comments

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

CSS comments are used to add extra explanation to the code, or to prevent the browser from parsing CSS code within a specific area. Comments have no effect on document layout.

CSS has only one kind of comment. Whether it is a multi-line comment or a single-line comment, it must start with /* and end with */, and add the comment content in the middle.

Syntax

Comments can be written anywhere in the style sheet where spaces are allowed. Comments can be written on one line or on multiple lines.

/* 需要注释的内容 */

Note: All text information placed between the /* and */ delimiters are called comments

Note: The "*" symbols should not be placed close to the comment content, and at least one space must be left empty.

How to add comments in css

1. Place comments outside the style sheet.

/*定义网页的头部样式*/
.head{ width: 960px; }
/*定义网页的底部样式*/
.footer {width:960px;}

2. Comments are placed inside the style sheet.

p{
    color: #ff7000;  /*字体颜色设置*/
    height:30px;  /*段落高度设置*/
}

Example: Comment the CSS code and view the effect under the browser

<html>
<head>
<style type="text/css">
/*样式1*/
.STYLE1 {
    color: #009900;  /*字体颜色是绿色的*/
}

/*样式2*/
.STYLE2 {
    font-size: 18px;  /*字体大小为18号字体*/
    color: #FF3300;  /*字体颜色是红色的*/
    font-weight: bold;  /*字体进行了加粗*/
}

/*样式3*/
.STYLE3 {
    color: #0000FF;  /*字体颜色为蓝色*/
    font-family: "黑体";  /*字体为黑体*/
    font-style: italic;  /*字体效果为倾斜*/
}
</style>
</head>
<body>
    <p class="STYLE1">段落设置一</p>
    <p class="STYLE2">段落设置二</p>
    <h2 id="标题设置效果">标题设置效果</h2>
</body>
</html>

Rendering:

How to write css style comments

Note: If we encounter a place that needs special explanation when writing CSS, we can use CSS annotations to annotate. Comments are helpful for others to read and understand the developed CSS code. Proper use of comments and as few comments as possible are beneficial to compatibility and file size reduction.

(Learning video sharing: css video tutorial)

The above is the detailed content of How to write css style comments. 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
Flexbox vs Grid: should I learn them both?Flexbox vs Grid: should I learn them both?May 10, 2025 am 12:01 AM

Yes,youshouldlearnbothFlexboxandGrid.1)Flexboxisidealforone-dimensional,flexiblelayoutslikenavigationmenus.2)Gridexcelsintwo-dimensional,complexdesignssuchasmagazinelayouts.3)Combiningbothenhanceslayoutflexibilityandresponsiveness,allowingforstructur

Orbital Mechanics (or How I Optimized a CSS Keyframes Animation)Orbital Mechanics (or How I Optimized a CSS Keyframes Animation)May 09, 2025 am 09:57 AM

What does it look like to refactor your own code? John Rhea picks apart an old CSS animation he wrote and walks through the thought process of optimizing it.

CSS Animations: Is it hard to create them?CSS Animations: Is it hard to create them?May 09, 2025 am 12:03 AM

CSSanimationsarenotinherentlyhardbutrequirepracticeandunderstandingofCSSpropertiesandtimingfunctions.1)Startwithsimpleanimationslikescalingabuttononhoverusingkeyframes.2)Useeasingfunctionslikecubic-bezierfornaturaleffects,suchasabounceanimation.3)For

@keyframes CSS: The most used tricks@keyframes CSS: The most used tricksMay 08, 2025 am 12:13 AM

@keyframesispopularduetoitsversatilityandpowerincreatingsmoothCSSanimations.Keytricksinclude:1)Definingsmoothtransitionsbetweenstates,2)Animatingmultiplepropertiessimultaneously,3)Usingvendorprefixesforbrowsercompatibility,4)CombiningwithJavaScriptfo

CSS Counters: A Comprehensive Guide to Automatic NumberingCSS Counters: A Comprehensive Guide to Automatic NumberingMay 07, 2025 pm 03:45 PM

CSSCountersareusedtomanageautomaticnumberinginwebdesigns.1)Theycanbeusedfortablesofcontents,listitems,andcustomnumbering.2)Advancedusesincludenestednumberingsystems.3)Challengesincludebrowsercompatibilityandperformanceissues.4)Creativeusesinvolvecust

Modern Scroll Shadows Using Scroll-Driven AnimationsModern Scroll Shadows Using Scroll-Driven AnimationsMay 07, 2025 am 10:34 AM

Using scroll shadows, especially for mobile devices, is a subtle bit of UX that Chris has covered before. Geoff covered a newer approach that uses the animation-timeline property. Here’s yet another way.

Revisiting Image MapsRevisiting Image MapsMay 07, 2025 am 09:40 AM

Let’s run through a quick refresher. Image maps date all the way back to HTML 3.2, where, first, server-side maps and then client-side maps defined clickable regions over an image using map and area elements.

State of Devs: A Survey for Every DeveloperState of Devs: A Survey for Every DeveloperMay 07, 2025 am 09:30 AM

The State of Devs survey is now open to participation, and unlike previous surveys it covers everything except code: career, workplace, but also health, hobbies, and more. 

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Article

Hot Tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools