HTML <!-…-> Tag

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HTML Comment Tag :

<!DOCTYPE html>
<html>
<body>
<!-- This is a comment -->
<!-- Comments are not displayed in the browser -->
<p>This is a paragraph.</p>
</body>
</html>

<!DOCTYPE html>

<html>

<body>

<p>This is a paragraph.</p>

</body>

</html>

Browser Support

The comment tag is supported in all major browsers.

Definition and Usage :

The comment tag is used to insert comments in the source code. Comments are not displayed in the browsers.
You can use comments to explain your code, which can help you when you edit the source code at a later date. This is especially useful if you have a lot of code.
It is also a good practice to use the comment tag to “hide” scripts from browsers without support for it (so they don’t show them as plain text):

Differences Between HTML 4.01 and HTML5

NONE.

Standard Attributes

The comment tag does not support any standard attributes.

More information about Standard Attributes.

Event Attributes

The comment tag does not support any event attributes.

More information about Event Attributes.