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Notice: The WebPlatform project, supported by various stewards between 2012 and 2015, has been discontinued. This site is now available on github.

html comment data-type


A syntactical production: The comment syntax indicates text within a document that is not displayed on the rendered page in the browser. A comment starts with <!-- and ends with -->.

Overview Table

DOM Interface

Comments can contain other HTML elements. Comments do not nest. Start and end tags are required.

In XML mode, comments must not start or end with a dash, and must not contain two consecutive dashes.


The following is an example of an HTML Comment.

<!-- This text will not appear in the browser window. -->