Master the Skill: How to Add Comments to CSS Simplified

how to add comments to css

Adding comments to your CSS code is an essential skill for any developer, whether you’re just starting or have been in the game for a while. Not only do comments make your code easier to read and maintain, but they also improve collaboration with team members and aid in debugging. In this article, we’ll cover all the basics of how to add comments to CSS, including best practices and guidelines for effective commenting.

Key Takeaways:

  • Adding comments to CSS is crucial for improving code readability and collaboration.
  • Understanding the syntax and placement of CSS comments is necessary for proper interpretation by browsers.
  • Guidelines for commenting in CSS include comment length, formatting, and proper usage.
  • Examples of CSS comments can provide a deeper understanding of how to implement comments effectively.
  • Following best practices and avoiding common commenting mistakes can ensure clean and maintainable CSS code.

Why are CSS Comments Important?

In the world of development, commenting in CSS is considered one of the best practices for maintaining code quality, readability and organization. Commenting in CSS allows developers to make notes, explain code sections and provide documentation for future reference. It helps in understanding the purpose and function of the code while facilitating communication within a team.

By adding comments to your code, you can make it easier for other developers to collaborate with you on a project. Comments also make it easier to debug code, especially in complicated projects with many files and functions. They help in identifying which parts of the code are responsible for specific functions, and make it easier to navigate through the code.

Commenting in CSS is essential to maintain consistency in coding standards, ensuring that all developers follow the same guidelines. By using comments effectively, you can make your code more self-explanatory, and easier to understand for future developers who may work on the project.

Best Practices for Commenting in CSS

While commenting in CSS is important, it is equally important to follow best practices for effective commenting. Following are some of the best practices for commenting in CSS:

  • Start commenting your code from the top, providing an overview of what the CSS file is all about.
  • Make sure to use clear and concise language while commenting your code.
  • Use comments to explain complex code or functions.
  • Avoid using comments to state the obvious.
  • Use consistent formatting and make sure comments are easy to distinguish from the code.
  • Use comments to provide information about why certain decisions were taken while writing the code.

Following these best practices can help you ensure that your code is easy to understand, even for someone who is not familiar with the project. Commenting in CSS is an essential tool for developers, and following best practices can help you improve the quality of your code.

Commenting in CSS

When it comes to commenting in CSS, there are two main types of syntax:

  • Single-line comments: These start with “//” and are used for commenting on a single line of code.
  • Multi-line comments: These start with “/*” and end with “*/”. They can be used to comment multiple lines of code.

The placement of comments in CSS is also important. You should use comments to logically separate sections of code and to divide code into manageable chunks. This helps in easy maintenance and modification of code.

In conclusion, commenting in CSS is essential for maintainable and readable code. By using best practices, you can improve code quality, and make your code more understandable for future developers. By using comments effectively, you can improve collaboration, documentation, and overall code quality.

CSS Comment Syntax and Placement

In CSS, comments are used to include notes and explanations within the code that are not interpreted by the browser. They are written in a specific format to avoid being interpreted as actual CSS rules. A comment in CSS begins with /* and ends with */. Everything between these characters is ignored by the browser and can be used to write anything you want.

When placing comments in your CSS code, you should consider the following recommendations:

  • Place comments before or after code blocks: Comments should be placed before or after the code they are referring to, not within the same line of code.
  • Avoid commenting too much: While comments are helpful, it’s important to not overdo it. Adding too many comments can clutter your CSS file and make it harder to read.
  • Comment complex sections or sections that may be confusing: If you have a complex section of code or something that may be confusing to others, a comment can help clarify its purpose.

Here’s an example of the correct syntax for adding comments in your CSS file:

/* This is a comment */

It’s important to note that comments cannot be nested within other comments. Therefore, if you need to add another comment within an existing comment, you’ll need to close the first comment before opening the second.

By following these guidelines for syntax and placement, you can ensure that your comments are properly interpreted by the browser and easily understood by others who may be working on your code in the future.

Guidelines for Commenting in CSS

When commenting in CSS, it’s important to follow certain guidelines to ensure consistency and readability. Here are some practical tips on how to effectively comment your CSS code:

Use Comments to Explain Code Sections

One of the main purposes of comments in CSS is to provide context and explanation for different sections of your code. Use comments to describe the purpose of a particular set of styles, or to explain a complex piece of code. This can be especially helpful for other developers who may be working with your code or for yourself when revisiting the code later on.

Keep Comments Concise and to the Point

While comments are useful for providing additional information, it’s important to keep them concise and to the point. Avoid writing lengthy paragraphs or repeating information that is already clear from the code itself. Instead, focus on highlighting important details or providing context where it’s needed.

Use Comment Formatting Consistently

Consistency is key when it comes to comment formatting. Decide on a consistent style for your comments, such as starting each comment with a specific symbol or using a particular indentation pattern. This will make it easier to read and understand your code, especially if other developers are working on the same project.

Comment at the Section and Property Level

When it comes to commenting in CSS, there are two levels at which you can add comments: the section level and the property level. Section-level comments provide an overview of a specific section of styles, while property-level comments explain individual rules. Consider using both types of comments to provide a complete picture of your CSS code.

Use Comments to Document Changes and Issues

Another use for comments in CSS is to document changes or issues that arise during the development process. For example, if you discover a bug in your code, you can add a comment explaining the issue and how it was resolved. This can be helpful for other developers who may encounter similar issues in the future.

By following these guidelines for commenting in CSS, you can ensure that your code is clear, maintainable, and easy to understand for yourself and other developers.

Examples of CSS Comments

Let’s take a look at some examples of how CSS comments can be used to improve the readability and organization of your code:

1. Section Headers

When working with a large CSS file, it’s helpful to divide your code into sections and label them with comments. For instance, you might use section headers to differentiate between styles for the header, footer, navigation, and main content:

/* Header Styles */
header {
/* Styles for the header */

2. Explanations and Notes

Adding comments in CSS is an excellent way to explain complex or unusual code sections. This can be especially helpful for other developers who might be working on the same project. For example:

// Decrease font size for small devices
@media (max-width: 480px) {
/* Styles for small devices */
font-size: 14px;

3. Browser-Specific Hacks

Sometimes you may need to use browser-specific hacks in your CSS code, which can make it difficult to read and maintain. By adding comments, you can make it clear which sections of code are targeted at specific browsers:

/* IE10+ only */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
/* IE10+ styles */

By using comments in CSS, you can ensure that your code is more readable, organized, and maintainable. Use these examples as inspiration for how you can implement comments into your own CSS files.

CSS Code Commenting Best Practices and Common Mistakes to Avoid

Commenting your CSS code is a best practice that can enhance the readability and organization of your code. Here are some guidelines to follow when it comes to CSS code commenting:

  • Be consistent: Use the same commenting style throughout your CSS file to maintain consistency. This makes it easier for other developers to read and understand your code.
  • Comment frequently: Add comments to your CSS file frequently to explain complex code sections, provide context, or simply to make notes for yourself or your team.
  • Keep comments short: A comment that is too long can be difficult to read and understand. Keep your comments short and to the point to maximize their effectiveness.
  • Use proper formatting: Comments should be formatted properly with adequate spacing and line breaks to ensure clear separation from your CSS code.

While commenting your CSS code is a best practice, there are also some common mistakes to avoid:

  1. Over-commenting: While it is important to comment your code, over-commenting can quickly make your CSS file cluttered and difficult to read. Avoid adding unnecessary comments.
  2. Commenting too little: On the flip side, not commenting enough can make it difficult for other developers to understand your code. Use your judgment to determine when a comment is needed.
  3. Not updating comments: Comments can become outdated as your code evolves. Make sure to update comments when you make changes to your CSS code to keep them accurate.
  4. Using comments as a substitute for code: Comments should not be used as a substitute for code. If a code section is not working correctly, fix the code rather than simply adding a comment to explain the issue.

By following these best practices and avoiding common mistakes, you can ensure clean and maintainable CSS code that is easy to read and understand for yourself and your team.


Adding comments to your CSS code may seem like a small detail, but it can have a big impact on your development process. By taking the time to properly comment your code, you can improve collaboration with your team, make debugging easier, and ensure that your code is maintainable over time.

Remember to follow the guidelines we outlined in this article, including using clear and concise comments, commenting as you go, and avoiding unnecessary comments. By doing so, you will be able to create clean, well-documented code that is easy for others to read and understand.

Keep Learning and Improving

Don’t stop here! Continue to learn and improve your CSS skills by practicing regularly and seeking out new resources online. Stay up-to-date on the latest best practices for code commenting, and always be open to feedback and suggestions from your team and peers.

Thank you for reading, and happy coding!


Q: How do I add comments to CSS code?

A: To add comments to CSS code, you can use the /* */ syntax. Anything placed between these symbols will be treated as a comment and will not affect the rendering of your CSS styles.

Q: Why should I use comments in CSS?

A: Comments in CSS serve as a way to document and explain your code. They can help you and other developers understand the purpose of certain styles, make notes for future reference, and improve collaboration within a development team.

Q: Where should I place CSS comments?

A: CSS comments can be placed anywhere within your code. However, it is recommended to place them above or near the section of code they are referring to. This makes it easier to locate and understand the purpose of the commented code.

Q: Are there any guidelines for commenting in CSS?

A: Yes, there are some guidelines you can follow for effective CSS commenting. Keep your comments concise, use clear and descriptive language, and avoid excessive commenting. It’s also a good practice to update or remove outdated comments to maintain code readability.

Q: Can you provide some examples of CSS comments?

A: Certainly! Here are a few examples of how you can use comments in CSS:
/* This section controls the header styles */
/* TODO: Refactor this code for better performance */
/* Use a CSS comment to temporarily disable a style */

Q: What are some best practices for CSS commenting?

A: When commenting in CSS, it’s important to be consistent with your commenting style throughout your codebase. Use comments to explain complex code sections, highlight important information, or provide context. Avoid commenting the obvious and focus on adding value to your code.

Q: What are common mistakes to avoid when commenting CSS code?

A: One common mistake is over-commenting, where every line of code is commented without providing any additional insights. Another mistake is leaving outdated comments that no longer reflect the current state of the code. It’s important to review and maintain your comments regularly to avoid confusion.

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