Hupspot CSS Comment Guide

Working with CSS inside Hubspot or any modern content platform is easier when you know how to comment out code safely. CSS comments help you debug, document your work, and collaborate with teammates without breaking your layout or deleting useful styles.

This guide walks through what CSS comments are, how they work under the hood, and how to use them effectively while keeping your stylesheets readable and maintainable.

What Is a CSS Comment in Hubspot Projects?

A CSS comment is a piece of text inside your stylesheet that browsers ignore. When you manage styles for a Hubspot site, comments let you leave instructions, label sections, or temporarily disable rules without removing them.

In standard CSS, comments always use this syntax:

/* This is a CSS comment */

Anything between /* and */ is treated as a comment and will not affect how the page looks.

Basic CSS Comment Syntax for Hubspot Styles

Whether you write CSS in a Hubspot theme, a module, or a standalone stylesheet, the commenting syntax stays the same. You can add comments on separate lines or at the end of a rule.

Single-Line CSS Comment

Use a single-line comment when you want to label one rule or leave a quick reminder:

/* Primary button styles */
.button-primary {
  background-color: #ff5c35;
  color: #ffffff;
}

Here, the comment clearly tells you what the rule does, which is especially useful when you revisit a Hubspot design months later.

Inline CSS Comment

You can also put a comment on the same line as a property or rule, as long as it appears after the code:

.hero-title {
  font-size: 3rem; /* Large title for hero section */
}

Inline comments help you explain specific property choices without taking much space in your stylesheet.

Multi-Line CSS Comment

Use a multi-line comment to describe complex logic or entire sections of a stylesheet for a Hubspot layout:

/*
  Header navigation styles
  - Desktop and mobile
  - Sticky behavior
*/
.site-header {
  position: sticky;
  top: 0;
}

The browser still treats this as one comment, even though it spans several lines.

How to Comment Out CSS Code in Hubspot

When you “comment out” CSS, you temporarily turn CSS rules into comments so the browser ignores them. This technique is very common when testing Hubspot pages, because you can disable styles without deleting them.

Step-by-Step: Comment Out a Single Rule

Locate the rule in your stylesheet or Hubspot design manager.
Wrap the rule with /* at the beginning and */ at the end.
Save and refresh your page to see the effect.

/*
.button-secondary {
  background-color: #f5f5f5;
  color: #333333;
}
*/

Now the secondary button styles are disabled, but you can restore them any time by removing the comment markers.

Comment Out Multiple CSS Rules

You can comment out large blocks of CSS when you want to test layout changes across an entire section of a Hubspot template.

/*
.hero-section {
  padding: 80px 20px;
}
.hero-section h1 {
  font-size: 3.5rem;
}
.hero-section p {
  max-width: 600px;
}
*/

This approach is helpful when you are troubleshooting spacing or typography issues that affect multiple elements at once.

Best Practices for CSS Comments in Hubspot Themes

Thoughtful use of comments keeps your Hubspot stylesheets readable and efficient. The goal is to add clarity, not clutter.

Use Comments to Organize Sections

Break your CSS into logical sections and label them with clear headings. For example:

/* ==========================
   Global Typography
   ========================== */

/* ==========================
   Hubspot Blog Styles
   ========================== */

These visual separators make it easier to scan large files, especially when multiple developers are working on the same Hubspot site.

Explain Complex or Non-Obvious Choices

When you use a workaround or a browser-specific fix, add a short explanation:

/* Fix for Safari flexbox bug on cards */
.card-list {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}

This prevents teammates from accidentally removing important code while refactoring Hubspot modules or templates.

Avoid Over-Commenting

Too many comments can be as confusing as not having any. Follow these guidelines:

Do not describe obvious properties (for example, color: #000000; /* sets text to black */).
Update or remove outdated comments whenever you change CSS.
Keep each comment focused and short.

Common CSS Comment Mistakes in Hubspot Projects

CSS comments are simple, but certain mistakes can break your stylesheet or lead to bugs in a Hubspot environment.

Using the Wrong Comment Syntax

Unlike JavaScript, CSS does not support // single-line comments. If you write:

// This will break CSS
.button-primary {
  background-color: #ff5c35;
}

The browser will treat // as invalid CSS, which can cause it to ignore the rest of the file. Always use /* ... */ in all Hubspot CSS files.

Nesting Comments

CSS does not support nested comments. This means the following pattern fails:

/*
  Main header styles
  /* temporary debug styles */
*/

The browser stops the comment at the first */ it finds, which can lead to unpredictable behavior. Instead, keep comments separate and avoid nesting entirely.

Debugging Layouts with CSS Comments in Hubspot

Comments are also powerful debugging tools when something looks wrong on a Hubspot page.

Use Comments for Progressive Testing

Try this workflow:

Comment out one suspicious rule or section.
Reload the Hubspot page and check the result.
If nothing changes, undo that comment and test another section.

By repeating this process, you can isolate the rule that causes layout issues without deleting any CSS.

Document Debug Sessions

When investigating a persistent styling bug, leave a short note:

/* TODO: Revisit mobile nav overlap issue on blog templates */

This helps your future self or another Hubspot developer understand what still needs attention.

Learning More About CSS Comments

For more detailed explanations and examples about commenting out CSS, you can review the original tutorial that inspired this guide on the HubSpot blog: how to comment out in CSS.

If you are planning a broader SEO or CMS strategy around a Hubspot implementation, you may also find it useful to consult with a specialized digital agency such as Consultevo for guidance on technical structure and performance.

Summary: Clean, Commented CSS for Hubspot Sites

Effective use of CSS comments keeps your codebase organized, easier to debug, and friendlier for collaboration across your Hubspot projects. Remember these core points:

Always use /* ... */ syntax in CSS.
Use comments to organize sections, clarify tricky choices, and document workarounds.
Avoid nested comments and JavaScript-style // comments.
Leverage comments as a safe way to toggle styles on and off while testing layouts in Hubspot environments.

With these habits, your stylesheets stay cleaner, your debugging sessions get shorter, and your Hubspot site is easier for the entire team to maintain.

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