HTML5 <!--...--> Tag
An HTML comment:
Try it yourself »
Definition and Usage
The comment tag is used to insert a comment in the source code. A comment will be ignored by the browser. You can use comments to explain your code, which can help you when you edit the source code at a later date.
You can also store program-specific information inside comments. In this case they will not be visible for the user, but they are still available to the program. A good practice is to comment the text inside scripts and style elements to prevent older browsers, that do not support scripting or styles, from showing it as plain text.
Differences Between HTML 4.01 and HTML5
The comment tag does not support any standard attributes.
More information about Standard Attributes.
The comment tag does not support any event attributes.
More information about Event Attributes.