Comments are used to add explanatory notes or prevent the browser from interpreting parts of the style sheet.
Comments can be placed where ever white space is allowed within a style sheet.
/* Comment */
/* A single line comment */ /* A comment which stretches over several lines */
/* */ comment syntax is used for both single and multi line comments. There is no other way to specify comments in external style sheets. However, when using the
<style> element, you may use
<!-- --> to hide CSS from older browsers, although this is not recommended. As in most programming languages that use the
/* */ comment syntax, comments cannot be nested. In other words, the first instance of
*/ that follows an instance of
/* closes the comment.