Are Quotation Marks Necessary for Multi-Word Font Families in CSS?

Font Family Quotation: A Necessary Enigma?

In CSS, the syntax for the font-family property has posed a lingering question: whether font names containing multiple words necessitate quotation marks. This article investigates the rationale behind this practice.

Is Quotation Required?

According to the CSS 2.1 specification, font family names can be defined both quoted as strings or unquoted as a sequence of identifiers. However, it recommends quoting names with white spaces, digits, or punctuation other than hyphens to avoid escaping issues.

Do Modern Browsers Care?

Despite the recommendation, modern browsers like Safari and Firefox seem to render unquoted font names correctly. This has led some to question whether quoting is still necessary.

Potential Pitfalls

While the lack of issues with unquoted names suggests their acceptability, there are certain scenarios where quoting is essential:

• Font names identical to CSS keywords (e.g., "inherit", "serif")
• Reserved future keywords ("initial", "default")
• Names containing特殊字符 like / or !

Conclusion

Based on the CSS specification and potential pitfalls, while modern browsers may not require quoting for font names containing multiple words, it remains best practice to quote them. This ensures consistent rendering across various browsers and minimizes the risk of potential issues.

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