Guide
Performance and CSS
Performance problems are often blamed on JavaScript first, but CSS quietly causes plenty of damage on its own.
Large bundles, deep selectors, poor animation choices, layout thrashing, and uncontrolled third-party styles all make sites slower to render and harder to maintain.
Where CSS hurts performance
- massive global stylesheets loaded everywhere
- expensive selectors with deep nesting
- layout-triggering animations
- unused framework CSS shipped to every page
- third-party widgets overriding everything
- legacy overrides stacked on overrides stacked on regret
How LSCSS helps
- explicit layers reduce override churn
- component structure limits unnecessary CSS scope
- isolated hacks stop performance debt spreading
- utilities reduce repeated declarations
- clear architecture improves long-term maintainability
Start here
Review the performance demos and compare animation choices, container behaviour, and CSS delivery decisions before they become expensive production problems.
Recommended reading
Fast websites are usually simpler websites. Unnecessary complexity raises long-term maintenance and performance cost.