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Possible Duplicate:
Why do /**/ comments work in stylesheets but // comments don't?
In CSS there is only one way to create comments: /* I'm a comment */
The problem is that it isn't nestable.
Does anyone know why we don't have an alternative comment syntax like //?
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To comment in CSS, simply place your plain text inside /* */ marks. This tells the browser that they are notes and should not be rendered on the front end.
The /* */ comment syntax is used for both single and multiline 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.
I think the real answer is that CSS treats newlines like any other whitespace, so it wouldn't make sense to have comments that are terminated by a newline. This is from the CSS1 spec: http://www.w3.org/TR/REC-CSS1
A CSS style sheet, for any version of CSS, consists of a list of statements. There are two kinds of statements: at-rules and rulesets. There may be whitespace (spaces, tabs, newlines) around the statements.
Of course, this also makes a lot of sense in the context of minification, as mentioned here: Why do /**/ comments work in stylesheets but // comments don't?.
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