HTML Comments

HTML Comments

In HTML, comments are used to insert notes, reminders, or documentation into the source code. These comments are not rendered in the browser and are only visible in the code, making them useful for development, collaboration, and maintenance.

🧩 Syntax of HTML Comments

HTML comments begin with <!-- and end with -->. Anything inside this block is ignored by the browser.

Syntax:

Example in Use:

🎯 Purpose of HTML Comments

HTML comments serve several purposes:

• Add internal documentation to explain sections of code
• Temporarily disable content or code during testing
• Leave reminders or notes for collaborators or future updates
• Segment large code blocks for easier navigation

✅ Best Practices

1. Use Comments Meaningfully

• Write descriptive comments that explain why something is done, not just what it is.

2. Avoid Sensitive Data

• Do not store passwords, keys, or secret URLs in comments.

3. Maintain Consistency

• Format comments with proper indentation and spacing.
• For multi-line comments, keep a clear and clean structure.

Multi-line Example:

🚫 What Not to Do with Comments

1. Do Not Nest Comments HTML does not support nested comments.

2. Don’t Overuse Comments Avoid excessive commenting in production code. Comments should clarify—not clutter—the code.

3. Don’t Use to Hide Large Code Blocks Avoid commenting out large scripts/styles in live environments unless absolutely needed for debugging.

💡 Example: Commenting Out Code

In this example, the second paragraph is commented out and will not be displayed on the web page.

✅ Key Takeaway

• HTML comments are written using <!-- comment here -->
• They are not shown in the browser but help developers maintain clean and understandable code
• Best used for documentation, debugging, and organizing content
• Avoid nesting, leaking sensitive data, or cluttering production code with unnecessary comments