Principles Of Clean And Optimized CSS Code

August 19, 2008

Some of you may remember the days when 30KB was the recommended maximum size of a web page, a value which included HTML, CSS, JavaScript, Flash, and images. I find with every new project with even the slightest bit of complexity, it’s not long before that 30 KB ideal is well out of my reach. With the popularity of CSS layouts and JavaScript-enriched web page experiences, it’s not uncommon, particularly for large sites, for the CSS files alone to jump well beyond that 30KB ceiling.

But there are some principles to consider during and after you write your CSS to help keep it tight and optimized. Optimization isn’t just minimizing file size — it’s also about being organized, clutter-free, and efficient. You’ll find that the more knowledge you have about optimal CSS practices, smaller file size will inevitably come as an direct result of their implementation. You may already be familiar with some of the principles mentioned below, but they are worth a review. Being familiar with this concepts will help you write optimized CSS code and make you a better all-around web designer.

  1. Use Shorthand
  2. Axe the Hacks
  3. Use whitespace wisely
  4. Prune frameworks and resets
  5. Future-proof your CSS
  6. Document your work
  7. Make use of compression

Clean and optimized code is important not just for file size, but for maintenance and readability as well. The principles mentioned above are good considerations not just for CSS, but can be applied to HTML, JavaScript, and other programming languages. CSS files are not as prominent as the rendering of your web site to an end-user, but consideration of the above principles can help with both the user experience (in the form of smaller file sizes) and the developer experience (cleaner code). Apply these principles to your current and future projects, and and you will surely appreciate the efforts.

Source: smashingmagazine.com

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