This is document title

HTML — Comments

Comment is a piece of code which is ignored by any web browser. It is a good practice to add comments into your HTML code, especially in complex documents, to indicate sections of a document, and any other notes to anyone looking at the code. Comments help you and others understand your code and increases code readability.

HTML comments are placed in between tags. So, any content placed with-in tags will be treated as comment and will be completely ignored by the browser.

Example

       
Document content goes here.
   

This will produce the following result without displaying the content given as a part of comments −

Valid vs Invalid Comments

Comments do not nest which means a comment cannot be put inside another comment. Second the double-dash sequence «—» may not appear inside a comment except as part of the closing —> tag. You must also make sure that there are no spaces in the start-of comment string.

Example

Here, the given comment is a valid comment and will be wiped off by the browser.

      
Document content goes here.
   

This will produce the following result −

But, following line is not a valid comment and will be displayed by the browser. This is because there is a space between the left angle bracket and the exclamation mark.

      < !-- This is not a valid comment -->
Document content goes here.
   

This will produce the following result −

Multiline Comments

So far we have seen single line comments, but HTML supports multi-line comments as well.

You can comment multiple lines by the special beginning tag placed before the first line and end of the last line as shown in the given example below.

Example

      
Document content goes here.
   

This will produce the following result −

Conditional Comments

Conditional comments only work in Internet Explorer (IE) on Windows but they are ignored by other browsers. They are supported from Explorer 5 onwards, and you can use them to give conditional instructions to different versions of IE.

Example

      
Hello , World!
   

This will produce the following result −

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HTML Comments

HTML comments are not displayed in the browser, but they can help document your HTML source code.

HTML Comment Tag

You can add comments to your HTML source by using the following syntax:

Notice that there is an exclamation point (!) in the start tag, but not in the end tag.

Note: Comments are not displayed by the browser, but they can help document your HTML source code.

Add Comments

With comments you can place notifications and reminders in your HTML code:

Example

Hide Content

Comments can be used to hide content.

This can be helpful if you hide content temporarily:

Example

This is another paragraph

—>

You can also hide more than one line. Everything between the will be hidden from the display.

Example

Hide a section of HTML code:

This is a paragraph.

Look at this cool image:

—>

This is a paragraph too.

Comments are also great for debugging HTML, because you can comment out HTML lines of code, one at a time, to search for errors.

Hide Inline Content

Comments can be used to hide parts in the middle of the HTML code.

Example

Hide a part of a paragraph:

HTML Exercises

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How to Comment in HTML

wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 27 people, some anonymous, worked to edit and improve it over time.

The wikiHow Tech Team also followed the article’s instructions and verified that they work.

This article has been viewed 290,641 times.

A comment is a line of code that is not read by web browsers. Commenting your code allows you to leave reminders and explanations for yourself and any other coder that will be working on the page. Commenting can also be used to quickly disable parts of your code when you’re testing or working on a new feature that isn’t ready yet. Learning how to properly use comments will lead to more efficient coding, for you and your coworkers.

Insert a single-line comment. Comments are designated by the tags . You can insert quick comments to remind you what is happening with the code.

html> head> title>Comment testtitle> head> body> p>This is the websitep> body> html> 

Create a multiline comment. Your comments can span multiple lines, which is useful for explaining complex code, or for blocking off large pieces of code.

html> head> title>Comment testtitle> head> body>   Your comment can be as long as you need it to be. Everything within the comment tags is kept from affecting the code on the page. --> p>This is the websitep> body> html> 

Use the comment function to quickly disable code. If you’re trying to track down a bug or want to keep code from running on the page, you can use the comment function to quickly block it off. That way, you can easily restore the code by deleting the comment tag.

html> head> title>Comment testtitle> head> body> p>Check out these imagesp> img src="/images/image1.jpg">   --> body> html> 

Use the comment function to hide scripts on unsupported browsers. If you are programming in JavaScript or VBScript, you can use the comment function to hide the script on browsers that don’t support it. Insert the comment at the start of the script, and end it with //—> to ensure that the script works on browsers that do support it.

html> head> title>VBScripttitle> head> body> script language="vbscript" type="text/vbscript">  document.write("Hello World!") //--> script> body> html> 

• The // in the end tag will prevent the script from executing the comment function if scripts are supported by the browser. [1] X Research source

Community Q&A

In the code. As the article said, it wont really show on the website, however it will be saved in the code.

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Thank you for your feedback.
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy! Claim Your Gift If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow

Comments placed on your website are done in PHP & MySQL code, not HTML. If you have CPanel, you can go to your Softaculous Apps Installer and install an APP that will either create a bulletin board, guest book or even down load word press onto your site. These apps are already written PHP/MySql and you can turn off or on the comments.

Thanks! We’re glad this was helpful.
Thank you for your feedback.
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy! Claim Your Gift If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow

You can include comments in your HTML code as follows: You will be able to see this when you’re reading the code, but your comment will not show up in your viewer’s browser.

Thanks! We’re glad this was helpful.
Thank you for your feedback.
As a small thank you, we’d like to offer you a $30 gift card (valid at GoNift.com). Use it to try out great new products and services nationwide without paying full price—wine, food delivery, clothing and more. Enjoy! Claim Your Gift If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow

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HTML Comment Tag

Many of us must have heard about HTML comments but have never seen them in web browsers. It’s just because of the HTML comment tag. This tutorial explains in detail about HTML comment tag and its usage.

What Does the HTML Tag Suggest?

An HTML tag is a group of characters constituting a formatted command for Web pages that an HTML developer typically uses as a markup language to mark the beginning and end of an HTML element of an HTML document. Not many tags use an opening and closing tag; to cover the content. Primarily, the developer can denote the closing tags having a backslash like this — . But these HTML tags will not be perceptible in the browser. The HTML tag denotes the end of that comment. So it is crucial to ensure that the HTML comment does not have inside it; rather, it should be outside the entire tag.

Definition and Use of HTML Comment Tag

As the name signifies, HTML developers use comment tags to write a comment within the HTML code; it makes the code easier to understand and improves its readability. Thus, HTML comment tags help the developer to insert comments in between tags. Also, they can use comments to explain their code to help them understand when they edit their source code for future purposes.

Advantages of HTML Comment Tag

• HTML comments help coders to understand the flexible ongoing flow of code.
• Developers can comment on any line of existing code using the comment tag.
• Later, the commented data can be uncommented or deleted if it becomes unusable.

Purpose of Using HTML Comment Tag

When developers think they need to insert small or medium-sized comments within the code for future purposes, they use HTML comment tags. Since the HTML tags do not include the text on the Web page, it becomes easy and flexible to know the intent of that comment. Code Snippet – To write a comment in the source code:

How to Add Single-Line Comment in HTML?

A single-line comment is a one-line comment; Its content is not displayed to any web browser. The comments in HTML do not reveal in the browser while the HTML document runs. In a one-line comment, when an HTML developer needs to define and clarify the intent behind the code written within an HTML document, or when they prefer to add a reminder for themselves, they can do it in the following manner can do:

      
About HTML Comments
 
Types of HTML Comments
 
Developer can write comments in different methods as required. There are three styles of writing comments.
 
This tutorial is going through each and every comment styles to define their specific usages.
 
This is an example of single-line comment
  

How to Comment a Line or Tag in HTML?

HTML developers can use inline comments to hide a particular line displayed in web browsers. Below is an example of writing this type of comment:

      
This comment is an inline comment
  

How to Comment Multiple Lines in HTML?

Finally, developers can add multiple lines as comments to an HTML document by following the methods shown below:

      
This comment is a multi-line comment
 

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