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We use ad-blockers as well, you know. We gotta keep those servers running though. Did you know that we publish useful books and run friendly conferences — crafted for pros like yourself? E.g. our upcoming SmashingConf London, dedicated to all things web performance.

Author:

Russ Weakley is a user-focused web designer and front-end developer with over 20 years experience designing and developing websites and web applications. He specialises in Front End Pattern Library development and Accessibility for Web Applications.

Twitter: Follow Russ Weakley on Twitter

Understanding The CSS Property Value Syntax

The World Wide Web Consortium uses a particular syntax to define the possible values that can be used for all CSS properties. You may have seen this syntax in action if you have ever looked at a CSS specification.

Understanding The CSS Property Value Syntax

Let's take a look: <'border-­image-­slice'> = [<number> | <percentage>]{1,4} && fill? This syntax can be hard to understand if you don’t know the various symbols and how they work. However, it is worth taking the time to learn. If you understand how the W3C defines property values, you will be able to understand any of the W3C’s CSS specifications.

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