Next.js Daily: CSS Features Control and Performance Optimizations
Next.js adds experimental Lightning CSS feature controls, allowing developers to force or skip specific CSS transformations regardless of browser targets. Multiple Turbopack performance improvements also landed, focusing on persistence and hashing optimizations.
Duration: PT2M5S
Episode overview
This episode is a short developer briefing from Next.js Daily.
It explains recent repository work in plain language.
- Show: Next.js Daily
- Published: 2026-03-11T10:30:03Z
- Audio duration: PT2M5S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning. This is Next.js Daily for March 11th, 2026.
The development team merged 17 pull requests yesterday with significant CSS and performance improvements.
Tobias Koppers merged the experimental lightningCssFeatures config option, adding granular control over CSS feature transpilation. Developers can now force transpilation of features like light-dark functions or skip transformations like nesting, overriding browser compatibility targets. The feature works with both…
Sam Selikoff merged updates to Instant Navs devtools functionality, replacing the previous blue pending state with a dedicated panel offering options to capture SSR shells or prefetch data for client navigation.
Luke Sandberg delivered multiple Turbopack performance optimizations. He merged fixed-size key block support for turbo-persistence, eliminating offset tables when entries share the same key size. His hashing improvements switched from twox-hash to xxhash-rust, reducing CPU overhead by up to 56% in some benchmarks.…
Joseph expanded Server Actions security guidance across documentation, adding comprehensive examples and warnings about input validation and authorization checks.
Nearby episodes from Next.js Daily
- Weekly Recap - Core Performance & Rendering Improvements
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- React Upgrade and Instant Navigation Features
- Parallel Routes and Developer Tools Update
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- Developer Experience Improvements and Error Handling
- Weekly Recap - Performance & Stability Focus
- Turbopack Chunking Refactor