Load CSS without blocking render

Render-blocking CSS delays First Contentful Paint—users see a blank screen while waiting for stylesheets to download and parse.

Quick Reference

• Use <link rel="preload" as="style"> with onload handler
• Inline critical CSS, defer non-critical styles
• Use media queries to split CSS by viewport/feature
• Modern: Next.js/Vite handle this automatically

Check

Analyze this CSS loading implementation to ensure stylesheets are loaded without blocking the DOM parsing and rendering process.

Fix

Implement non-blocking CSS loading using the preload technique with media attributes and loadCSS polyfill for better performance.