CSS vs Sass in 2026: Do You Still Need a Preprocessor?
Modern CSS has caught up to most Sass features. Here is what I still use a preprocessor for and what I have replaced with native CSS. I started using Sass in 2012, back when CSS did not have variables, nesting, or any kind of programmatic capability for generating values. It was essential for any serious project. But the CSS specification has evolved dramatically since then, and I find myself reaching for Sass less and less with each new project. In 2026, the question is no longer whether you need a preprocessor. it is which specific features still justify the build step. Variables: Custom Properties Win CSS custom properties have fully replaced Sass variables for my use cases. They cascade through the DOM (something Sass cannot do), they can be changed at runtime with JavaScript, and they support theme switching without a rebuild. The one feature I missed was the ability to programmatically lighten or darken colors, but color-mix() now covers that use case natively. :root { --brand: #3b82f6; --brand-hover: color-mix(in srgb, var(--brand), white 15%); --brand-active: color-mix(in srgb, var(--brand), black 15%); } With Sass, I needed darken() and lighten() functions that ran at compile time. If I…