Oskar Kwaśniewski
@kwasniew.ski
Building React Native for visionOS at @callstackio 🥽 @reactnative Core Contributor, Creator of http://minisim.app 📱
Reposted by Oskar Kwaśniewski
I made a video explaining, step by step, how to implement the new Liquid Glass bottom tabs in your Expo app!
Link: youtu.be/L5f8Gy91Gv4
Link: youtu.be/L5f8Gy91Gv4
June 12, 2025 at 12:22 PM
I made a video explaining, step by step, how to implement the new Liquid Glass bottom tabs in your Expo app!
Link: youtu.be/L5f8Gy91Gv4
Link: youtu.be/L5f8Gy91Gv4
Reposted by Oskar Kwaśniewski
Performance isn't magic—it’s patterns. @kwasniew.ski walks through practical React Native optimizations you can use today.
Think React Compiler, FPS tips, Hermes configs
Watch the full talk 🎥 BS clstk.com/4mJuxR5
Think React Compiler, FPS tips, Hermes configs
Watch the full talk 🎥 BS clstk.com/4mJuxR5
Tips & Tricks From The Ultimate Guide to React Native Optimization 2025 | Callstack
View flattening, React 19 hooks, real DevTools tips—learn what actually helps your React Native app run faster.
clstk.com
June 6, 2025 at 3:14 PM
Performance isn't magic—it’s patterns. @kwasniew.ski walks through practical React Native optimizations you can use today.
Think React Compiler, FPS tips, Hermes configs
Watch the full talk 🎥 BS clstk.com/4mJuxR5
Think React Compiler, FPS tips, Hermes configs
Watch the full talk 🎥 BS clstk.com/4mJuxR5
Working on my slides for @callstack.com React Universe meet-up next week in San Francisco 🌉
Let me know if you want to grab a coffee in SF ☕️
Let me know if you want to grab a coffee in SF ☕️
April 19, 2025 at 12:34 PM
Working on my slides for @callstack.com React Universe meet-up next week in San Francisco 🌉
Let me know if you want to grab a coffee in SF ☕️
Let me know if you want to grab a coffee in SF ☕️
Reposted by Oskar Kwaśniewski
There’s a new speaker in the lineup at the React Universe Meetup, San Francisco! @kwasniew.ski is bringing 🔥 from The Ultimate Guide to React Native Optimization 2025.
Think:
— DevTools deep dives
— React 19’s use & useOptimistic
— View flattening magic
📍Sign in → callstack.com/events/react...
Think:
— DevTools deep dives
— React 19’s use & useOptimistic
— View flattening magic
📍Sign in → callstack.com/events/react...
React Universe Meetup, San Francisco with Expensify | {callstack}
Callstack and Expensify will present React Native Enterprise Framework
callstack.com
April 15, 2025 at 11:13 AM
There’s a new speaker in the lineup at the React Universe Meetup, San Francisco! @kwasniew.ski is bringing 🔥 from The Ultimate Guide to React Native Optimization 2025.
Think:
— DevTools deep dives
— React 19’s use & useOptimistic
— View flattening magic
📍Sign in → callstack.com/events/react...
Think:
— DevTools deep dives
— React 19’s use & useOptimistic
— View flattening magic
📍Sign in → callstack.com/events/react...
Reposted by Oskar Kwaśniewski
Reposted by Oskar Kwaśniewski
Why settle for “almost native” when you can go fully native? Integrating SwiftUI with React Native, you can use native components (like Slider and TabView) while keeping the power of React’s architecture. Read a step-by-step guide by @kwasniew.ski 📖 hubs.li/Q038zpVL0
February 27, 2025 at 2:11 PM
Why settle for “almost native” when you can go fully native? Integrating SwiftUI with React Native, you can use native components (like Slider and TabView) while keeping the power of React’s architecture. Read a step-by-step guide by @kwasniew.ski 📖 hubs.li/Q038zpVL0
The new version of React Native Bottom Tabs is out! 🎉
A new highly anticipated feature: Custom JavaScript Tabs! ✨
Provide your custom tab bar while leveraging native navigation underneath 🚀
Here is a demo of it in the 🦋 app!
This demonstrates smooth screen transitions using native animations!
A new highly anticipated feature: Custom JavaScript Tabs! ✨
Provide your custom tab bar while leveraging native navigation underneath 🚀
Here is a demo of it in the 🦋 app!
This demonstrates smooth screen transitions using native animations!
February 5, 2025 at 4:17 PM
The new version of React Native Bottom Tabs is out! 🎉
A new highly anticipated feature: Custom JavaScript Tabs! ✨
Provide your custom tab bar while leveraging native navigation underneath 🚀
Here is a demo of it in the 🦋 app!
This demonstrates smooth screen transitions using native animations!
A new highly anticipated feature: Custom JavaScript Tabs! ✨
Provide your custom tab bar while leveraging native navigation underneath 🚀
Here is a demo of it in the 🦋 app!
This demonstrates smooth screen transitions using native animations!
Reposted by Oskar Kwaśniewski
After more than 3 years of stop, the “S” project has started again.
Stack:
- Expo
- Expo-Router
- React Native Bottom Tabs @kwasniew.ski ❤️
- Tamagui
- GraphQL
- Codegen
Stack:
- Expo
- Expo-Router
- React Native Bottom Tabs @kwasniew.ski ❤️
- Tamagui
- GraphQL
- Codegen
January 31, 2025 at 9:58 PM
After more than 3 years of stop, the “S” project has started again.
Stack:
- Expo
- Expo-Router
- React Native Bottom Tabs @kwasniew.ski ❤️
- Tamagui
- GraphQL
- Codegen
Stack:
- Expo
- Expo-Router
- React Native Bottom Tabs @kwasniew.ski ❤️
- Tamagui
- GraphQL
- Codegen
Reposted by Oskar Kwaśniewski
💅 Level up your React Native app's UI with beautiful bottom tabs!
This blog post from @kwasniew.ski walks you through the creation of stunning bottom tabs that adapt to the interfaces of different platforms (tvOS, visionOS, iOS, Android, iPadOS, macOS).
expo.dev/blog/how-to-...
This blog post from @kwasniew.ski walks you through the creation of stunning bottom tabs that adapt to the interfaces of different platforms (tvOS, visionOS, iOS, Android, iPadOS, macOS).
expo.dev/blog/how-to-...
How to build beautiful React Native bottom tabs
Learn how to build beautiful bottom tabs with the react-native-bottom-tabs library.
expo.dev
January 28, 2025 at 6:29 PM
💅 Level up your React Native app's UI with beautiful bottom tabs!
This blog post from @kwasniew.ski walks you through the creation of stunning bottom tabs that adapt to the interfaces of different platforms (tvOS, visionOS, iOS, Android, iPadOS, macOS).
expo.dev/blog/how-to-...
This blog post from @kwasniew.ski walks you through the creation of stunning bottom tabs that adapt to the interfaces of different platforms (tvOS, visionOS, iOS, Android, iPadOS, macOS).
expo.dev/blog/how-to-...
Reposted by Oskar Kwaśniewski
Got native iOS bottom tabs in RN to become opaque on scroll to edge, thanks to @kwasniew.ski
Achieved the native behavior where the header or bottom tab fades at the scroll edge. Header's code is inspired by @bacon.bsky.social's tweet.
Looks good, but needs a few workarounds.
See it here 👇
Achieved the native behavior where the header or bottom tab fades at the scroll edge. Header's code is inspired by @bacon.bsky.social's tweet.
Looks good, but needs a few workarounds.
See it here 👇
January 25, 2025 at 9:18 PM
Got native iOS bottom tabs in RN to become opaque on scroll to edge, thanks to @kwasniew.ski
Achieved the native behavior where the header or bottom tab fades at the scroll edge. Header's code is inspired by @bacon.bsky.social's tweet.
Looks good, but needs a few workarounds.
See it here 👇
Achieved the native behavior where the header or bottom tab fades at the scroll edge. Header's code is inspired by @bacon.bsky.social's tweet.
Looks good, but needs a few workarounds.
See it here 👇
React Native visionOS 0.77 is out 🎉
This release contains all the changes from React Native 0.77 🚀
If you are upgrading, check out the release notes for additional instructions!
https://buff.ly/3PO0JDN
This release contains all the changes from React Native 0.77 🚀
If you are upgrading, check out the release notes for additional instructions!
https://buff.ly/3PO0JDN
January 24, 2025 at 8:35 AM
React Native visionOS 0.77 is out 🎉
This release contains all the changes from React Native 0.77 🚀
If you are upgrading, check out the release notes for additional instructions!
https://buff.ly/3PO0JDN
This release contains all the changes from React Native 0.77 🚀
If you are upgrading, check out the release notes for additional instructions!
https://buff.ly/3PO0JDN
Reposted by Oskar Kwaśniewski
React Native TV 0.77 is out! github.com/react-native...
0.77.0-0 release is now available · react-native-tvos react-native-tvos · Discussion #864
The public release of React Native 0.77 for TV. See the React Native 0.77 blog post from the core team. Changes from RN core 0.77: v0.77.0...v0.77.0-0 This discussion was created from the release 0...
github.com
January 23, 2025 at 11:02 AM
React Native TV 0.77 is out! github.com/react-native...
Here is an example of using multiple windows on iPadOS with React Native! ✨
Thanks to React Native Factory integrating this became a lot easier and now I'm working on first-party support for this feature! 👀
Thanks to React Native Factory integrating this became a lot easier and now I'm working on first-party support for this feature! 👀
January 23, 2025 at 11:21 AM
Here is an example of using multiple windows on iPadOS with React Native! ✨
Thanks to React Native Factory integrating this became a lot easier and now I'm working on first-party support for this feature! 👀
Thanks to React Native Factory integrating this became a lot easier and now I'm working on first-party support for this feature! 👀
Reposted by Oskar Kwaśniewski
Legend List 1.0 beta is ready!
It started as a performance experiment, but it ended up solving a lot of the major issues with lists in React Native. 🎉
✨ Better perf than FlashList
✨ maintainContentVisiblePosition
✨ Bidirectional infinite lists
✨ Chat UI without inverting
It started as a performance experiment, but it ended up solving a lot of the major issues with lists in React Native. 🎉
✨ Better perf than FlashList
✨ maintainContentVisiblePosition
✨ Bidirectional infinite lists
✨ Chat UI without inverting
January 20, 2025 at 12:57 PM
Legend List 1.0 beta is ready!
It started as a performance experiment, but it ended up solving a lot of the major issues with lists in React Native. 🎉
✨ Better perf than FlashList
✨ maintainContentVisiblePosition
✨ Bidirectional infinite lists
✨ Chat UI without inverting
It started as a performance experiment, but it ended up solving a lot of the major issues with lists in React Native. 🎉
✨ Better perf than FlashList
✨ maintainContentVisiblePosition
✨ Bidirectional infinite lists
✨ Chat UI without inverting
A new version of React Native Bottom Tabs 0.8.0 is out! 🎉
Lots of work went into this release:
- Complete refactoring of Android view management ♻️
- New Android Page Transitions ✨
- Material You support 🎨
- Other bug fixes 🔧
Lots of work went into this release:
- Complete refactoring of Android view management ♻️
- New Android Page Transitions ✨
- Material You support 🎨
- Other bug fixes 🔧
January 20, 2025 at 11:14 AM
A new version of React Native Bottom Tabs 0.8.0 is out! 🎉
Lots of work went into this release:
- Complete refactoring of Android view management ♻️
- New Android Page Transitions ✨
- Material You support 🎨
- Other bug fixes 🔧
Lots of work went into this release:
- Complete refactoring of Android view management ♻️
- New Android Page Transitions ✨
- Material You support 🎨
- Other bug fixes 🔧
Solving issues around Swift’s modular headers in React Native can be challenging 👀
In this article, I’m going over a few solutions that will help you resolve them!
Check it out ⬇️
https://buff.ly/3DZmDkY
In this article, I’m going over a few solutions that will help you resolve them!
Check it out ⬇️
https://buff.ly/3DZmDkY
January 16, 2025 at 11:43 AM
Solving issues around Swift’s modular headers in React Native can be challenging 👀
In this article, I’m going over a few solutions that will help you resolve them!
Check it out ⬇️
https://buff.ly/3DZmDkY
In this article, I’m going over a few solutions that will help you resolve them!
Check it out ⬇️
https://buff.ly/3DZmDkY
Android's Material You was introduced with Android 12, yet many apps still don't leverage this feature 🤔
Here is a showcase of React Native Bottom Tabs + Material You theming changing based on system appearance ✨
Here is a showcase of React Native Bottom Tabs + Material You theming changing based on system appearance ✨
January 15, 2025 at 12:31 PM
Android's Material You was introduced with Android 12, yet many apps still don't leverage this feature 🤔
Here is a showcase of React Native Bottom Tabs + Material You theming changing based on system appearance ✨
Here is a showcase of React Native Bottom Tabs + Material You theming changing based on system appearance ✨
Reposted by Oskar Kwaśniewski
Big tip of the hat to the react-native releases crew.
I track their releases with rigorous build testing to ensure react-native-firebase builds cleanly. Zero issues with the upcoming 0.77 release through entire rc cycle.
react-native 0.77.0 full release coming soon and I'm looking forward to it!
I track their releases with rigorous build testing to ensure react-native-firebase builds cleanly. Zero issues with the upcoming 0.77 release through entire rc cycle.
react-native 0.77.0 full release coming soon and I'm looking forward to it!
January 9, 2025 at 3:43 PM
Big tip of the hat to the react-native releases crew.
I track their releases with rigorous build testing to ensure react-native-firebase builds cleanly. Zero issues with the upcoming 0.77 release through entire rc cycle.
react-native 0.77.0 full release coming soon and I'm looking forward to it!
I track their releases with rigorous build testing to ensure react-native-firebase builds cleanly. Zero issues with the upcoming 0.77 release through entire rc cycle.
react-native 0.77.0 full release coming soon and I'm looking forward to it!
Reposted by Oskar Kwaśniewski
React Native ❤️ Apple Vision Pro, says @kwasniew.ski, but is the feeling mutual? 😈
Discover Oskar's work on visionOS, and get ideas how to leverage React Native's full capabilities in universal apps: hubs.li/Q030Yr490
Discover Oskar's work on visionOS, and get ideas how to leverage React Native's full capabilities in universal apps: hubs.li/Q030Yr490
January 2, 2025 at 11:21 AM
React Native ❤️ Apple Vision Pro, says @kwasniew.ski, but is the feeling mutual? 😈
Discover Oskar's work on visionOS, and get ideas how to leverage React Native's full capabilities in universal apps: hubs.li/Q030Yr490
Discover Oskar's work on visionOS, and get ideas how to leverage React Native's full capabilities in universal apps: hubs.li/Q030Yr490
Reposted by Oskar Kwaśniewski
Can it be done in React Native, yes!
At WWDC 2024, Apple added a new API for creating custom UI effects using Metal shaders. I wanted to see if you could do the same with React Native. With react-native-skia, you can! Left is the Apple demo, right is skia on react-native-macos 😃
At WWDC 2024, Apple added a new API for creating custom UI effects using Metal shaders. I wanted to see if you could do the same with React Native. With react-native-skia, you can! Left is the Apple demo, right is skia on react-native-macos 😃
December 29, 2024 at 6:41 AM
Can it be done in React Native, yes!
At WWDC 2024, Apple added a new API for creating custom UI effects using Metal shaders. I wanted to see if you could do the same with React Native. With react-native-skia, you can! Left is the Apple demo, right is skia on react-native-macos 😃
At WWDC 2024, Apple added a new API for creating custom UI effects using Metal shaders. I wanted to see if you could do the same with React Native. With react-native-skia, you can! Left is the Apple demo, right is skia on react-native-macos 😃
Reposted by Oskar Kwaśniewski
Success! For Christmas this year, I got React Native Skia working on macOS!
Along the way I learned quite a bit about Shaders, WebGPU, and just how extensively Skia is used. It's such an interesting space! I'm glad there are still new things to learn in UI dev 😎
Along the way I learned quite a bit about Shaders, WebGPU, and just how extensively Skia is used. It's such an interesting space! I'm glad there are still new things to learn in UI dev 😎
December 26, 2024 at 2:27 AM
Success! For Christmas this year, I got React Native Skia working on macOS!
Along the way I learned quite a bit about Shaders, WebGPU, and just how extensively Skia is used. It's such an interesting space! I'm glad there are still new things to learn in UI dev 😎
Along the way I learned quite a bit about Shaders, WebGPU, and just how extensively Skia is used. It's such an interesting space! I'm glad there are still new things to learn in UI dev 😎
Reposted by Oskar Kwaśniewski
Meet Fabrice AI - functional framework for building AI agents.
While building Cali, I needed something stateless that can work on the server, inside CLI, breakdown complex tasks, and be simple.
Couldn't find one, so I built one. Give it a try!
github.com/callstackinc...
While building Cali, I needed something stateless that can work on the server, inside CLI, breakdown complex tasks, and be simple.
Couldn't find one, so I built one. Give it a try!
github.com/callstackinc...
December 10, 2024 at 10:01 PM
Meet Fabrice AI - functional framework for building AI agents.
While building Cali, I needed something stateless that can work on the server, inside CLI, breakdown complex tasks, and be simple.
Couldn't find one, so I built one. Give it a try!
github.com/callstackinc...
While building Cali, I needed something stateless that can work on the server, inside CLI, breakdown complex tasks, and be simple.
Couldn't find one, so I built one. Give it a try!
github.com/callstackinc...
Another TIL 📚
When defining platforms in your library .podspec file it's better to specify them individually.
I thought it didn't make any difference until I ran into some weird compilation issues on macOS due to some odd flags passed by cocoapods 🫠
Thanks @saadnajmi.bsky.social 🙏
When defining platforms in your library .podspec file it's better to specify them individually.
I thought it didn't make any difference until I ran into some weird compilation issues on macOS due to some odd flags passed by cocoapods 🫠
Thanks @saadnajmi.bsky.social 🙏
December 5, 2024 at 9:24 AM
Another TIL 📚
When defining platforms in your library .podspec file it's better to specify them individually.
I thought it didn't make any difference until I ran into some weird compilation issues on macOS due to some odd flags passed by cocoapods 🫠
Thanks @saadnajmi.bsky.social 🙏
When defining platforms in your library .podspec file it's better to specify them individually.
I thought it didn't make any difference until I ran into some weird compilation issues on macOS due to some odd flags passed by cocoapods 🫠
Thanks @saadnajmi.bsky.social 🙏
Reposted by Oskar Kwaśniewski
Hey @grabbou.com and @kwasniew.ski you got a shoutout in the latest Bytes.dev - when next release? 😎
bytes.dev/archives/345
bytes.dev/archives/345
Bytes #345 - Expo magic intensifies
Tailwind's theme music, juicy rasterization secrets, and how to build Reddit without getting distracted by Reddit.
bytes.dev
November 27, 2024 at 11:10 AM
Hey @grabbou.com and @kwasniew.ski you got a shoutout in the latest Bytes.dev - when next release? 😎
bytes.dev/archives/345
bytes.dev/archives/345