Lightning CSS

An extremely fast CSS parser, transformer, bundler, and minifier.

[Devon Govett @devongovett]

Looks like Vite 8 is using Lightning CSS as the default CSS minifier! Most next-generation build tools are now using it, including Turbopack, Rspack, Tailwind, Parcel, Bun (a port), and now Vite. ⚡️

[Devon Govett @devongovett]

DevStack™ Lightning CSS v1.30.0 is released! 😀

⚡️ Updated relative color spec for numbers and percentages
⚡️ Updated nesting spec for pseudo elements and interleaved rules
⚡️ Skip generating unnecessary @​supports
⚡️ Android support
⚡️ ... and more!

https://t.co/32MBqcJpV6

[Devon Govett @devongovett]

Very excited to see oxvg, a Rust-based alternative to SVGO powered by @lightningcss and other browser-grade components from Servo! Has the potential to be not just faster, but also optimize better. ⚡️

https://t.co/5wB5cN16cj

[Devon Govett @devongovett]

⚡️ @lightningcss inside ™

[Devon Govett @devongovett]

Just released Lightning CSS v1.29! ⚡️

• Support for View Transitions Level 2 rules, properties, and selectors, with css module scoping
• @​font-feature-values
• Enable/disable compiling light-dark()
• Better media query range output
• ...and more!

https://t.co/b0q7SjTNIr

[Devon Govett @devongovett]

Released Lightning CSS v1.28! ⚡️

• Option to skip hashing container names in CSS modules
• Fixed bugs with calc() minification
• Fixed ordering issue for size properties with fallback values
• Improved error messages for selectors and CSS modules

https://t.co/yC8C3tsqZt

[Devon Govett @devongovett]

Thanks for the sponsor! Excited to see Rolldown using @lightningcss! ⚡️

[StyleX @stylexjs]

Happy new week! New StyleX release v0.8.0 is out now!

- new and improved lint rules
- many small fixes
- introducing lightningcss to our Rollup plugin.

[Devon Govett @devongovett]

Lightning CSS v1.27.0 is out! ⚡️

Adds a [content-hash] pattern for CSS modules, enabling multiple versions of a library to coexist without conflicts.

Implements "pure mode" for CSS modules, which enforces each rule to be locally scoped with at least one id or class selector. Thanks @kdy1dev!

Also improves selector parser error messages and fixes some bugs. Thanks to everyone who contributed! 😍

https://t.co/QuUp63c8Ci

[Devon Govett @devongovett]

Just released @lightningcss v1.26.0!

⏵ Support for animation-range properties
⏵ Support for named timeline ranges in @​keyframes
⏵ Error on unsupported :global/:local syntax in CSS modules
⏵ Support for Windows on ARM

https://t.co/zJ6hjlUkQ0

[Devon Govett @devongovett]

Cool milestone: Lightning CSS passed 1 million weekly downloads this week! And that's not even counting Next.js, which compiles its own copy. 📈⚡️

[Devon Govett @devongovett]

Lightning CSS v1.25.0 is out! ⚡️

• CSS module options to disable scoping for grid, animation, and other features
• Optimizes the `all` shorthand
• Support animation-timeline in animation shorthand
• Bug fixes for transforms, color, and animations

https://t.co/F8YFmIfzsP

[Devon Govett @devongovett]

The one with @lightningcss ⚡️

[Devon Govett @devongovett]

Want to use light-dark() today across all browsers? Use @lightningcss! ⚡️

https://t.co/Zpyj5VF3jk

[Devon Govett @devongovett]

Nice to see Lightning CSS making its way into more tools! Those are some great performance improvements too: 70x faster CSS compilation, 30% faster builds overall. ⚡️

[Devon Govett @devongovett]

Big day for Lightning CSS! First Tailwind v4, and now Next.js. 🎉

[Devon Govett @devongovett]

Tailwind now has Lightning CSS built in! Huge congrats to the team on shipping. ⚡️

[Devon Govett @devongovett]

Just released Lightning CSS v1.24.0! ⚡️

Support for compiling the light-dark() color function, enabling simple OS + programmatic dark mode toggles! 🌘

Also improves minification for custom properties, @​keyframes rules, system colors, and more! 💪

https://t.co/VujSL2pqmy

[Devon Govett @devongovett]

The next version of Lightning CSS will be able to down-level the light-dark() function using some CSS variable fallback tricks! This lets you implement dark mode without writing any media queries, and programmatically switch themes just by changing the `color-scheme` property. 🤯

[Devon Govett @devongovett]

Just released @lightningcss v1.23.0!

🌈 Downleveling for relative color syntax with variables in the alpha channel
🍰 Optimized @​layer and @​property rule minification
🏝️ StyleSheet and StyleSheetExit visitors for custom plugins
🤩 ... and more!

https://t.co/EOUE8o21sj