Hyphens or underscores in CSS and HTML identifiers?

Posted by Török Gábor on Stack Overflow See other posts from Stack Overflow or by Török Gábor
Published on 2009-11-06T09:03:22Z Indexed on 2010/04/04 16:43 UTC
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Filed under:

html

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css

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best-practices

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coding-style

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naming-conventions

As both hyphen (-) and underscore (_) are valid characters in CSS and HTML identifiers, what are the advantages and disadvantages using one or the other? I prefer writing CSS class names with hyphens (e.g. field-text) and underscores for IDs (e.g. featured_content). Is there a best practice or it's only the matter of taste?

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