How To Optimize CSS for Peak Site Performance

There are many options for optimizing CSS performance, but for new projects, consider the following practices:
Use a mobile-first approach: Code the simplest mobile layout first, then add enhancements as the screen space and browser feature set increase.
Split CSS into separate files with identifiable responsibilities: A CSS pre-processor or CMS plugin can combine CSS partials into a single file.
Add a build step: Tools are available that can automatically lint code, identify problems, concatenate, minify, reduce image sizes, and more. Automation makes life easier, and you’re less likely to forget an optimization step.
Document your stylesheets: A style guide with documented examples will make your code easier to pick up and maintain. You’ll be able to identify and remove old CSS without breaking a sweat.


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