Jay Meistrich
@jayz.us
Building legendstate.com, bravely.io, legendapp.com. Been a digital nomad for 12 years. Posting about 🔥 Legend-State, ⚡️web perf, 🤯 productivity, and ✈️ traveling.
I've got LegendList's scrollToIndex and sticky headers features working in react-dom now (though not fully optimized yet) - try it out in @legendapp/[email protected] 🎉
If you've used another web virtualized list library before, what are your pain points?
If you've used another web virtualized list library before, what are your pain points?
October 20, 2025 at 10:38 AM
I've got LegendList's scrollToIndex and sticky headers features working in react-dom now (though not fully optimized yet) - try it out in @legendapp/[email protected] 🎉
If you've used another web virtualized list library before, what are your pain points?
If you've used another web virtualized list library before, what are your pain points?
Legend List 2.0 is LIVE!
The ⚡️ fastest React Native list library, in 100% JS, now with more accuracy and speed!
✨Perfectly accurate scrollToIndex
✨Even faster
✨Zero mount time on new arch
✨Sticky headers
✨estimatedItemSize is optional
✨New and old arch
www.legendapp.com/open-source/...
The ⚡️ fastest React Native list library, in 100% JS, now with more accuracy and speed!
✨Perfectly accurate scrollToIndex
✨Even faster
✨Zero mount time on new arch
✨Sticky headers
✨estimatedItemSize is optional
✨New and old arch
www.legendapp.com/open-source/...
September 5, 2025 at 10:56 AM
Legend List 2.0 is LIVE!
The ⚡️ fastest React Native list library, in 100% JS, now with more accuracy and speed!
✨Perfectly accurate scrollToIndex
✨Even faster
✨Zero mount time on new arch
✨Sticky headers
✨estimatedItemSize is optional
✨New and old arch
www.legendapp.com/open-source/...
The ⚡️ fastest React Native list library, in 100% JS, now with more accuracy and speed!
✨Perfectly accurate scrollToIndex
✨Even faster
✨Zero mount time on new arch
✨Sticky headers
✨estimatedItemSize is optional
✨New and old arch
www.legendapp.com/open-source/...
Getting Legend List for web ready for my @reactuniverseconf.com talk in beautiful Wroclaw 😍
August 30, 2025 at 10:12 AM
Getting Legend List for web ready for my @reactuniverseconf.com talk in beautiful Wroclaw 😍
I got maintainVisibleContentPosition working in LegendList on web 🎉
So it looks like we can support initialScrollIndex with no jank scrolling up, and bidirectional infinite lists should work too!
The solution seems to be scrollBy(), which does not break momentum scrolling 👍
So it looks like we can support initialScrollIndex with no jank scrolling up, and bidirectional infinite lists should work too!
The solution seems to be scrollBy(), which does not break momentum scrolling 👍
August 23, 2025 at 8:16 PM
I got maintainVisibleContentPosition working in LegendList on web 🎉
So it looks like we can support initialScrollIndex with no jank scrolling up, and bidirectional infinite lists should work too!
The solution seems to be scrollBy(), which does not break momentum scrolling 👍
So it looks like we can support initialScrollIndex with no jank scrolling up, and bidirectional infinite lists should work too!
The solution seems to be scrollBy(), which does not break momentum scrolling 👍
Legend List 2.0 is now in beta!
✨ Improved performance
✨ Perfectly accurate scrollToIndex
✨ Mount time on new arch goes from pretty fast to ZERO
✨ Sticky headers
✨ estimatedItemSize is now optional
✨ Fixes many bugs
✨ Improved performance
✨ Perfectly accurate scrollToIndex
✨ Mount time on new arch goes from pretty fast to ZERO
✨ Sticky headers
✨ estimatedItemSize is now optional
✨ Fixes many bugs
August 18, 2025 at 11:13 AM
Legend List 2.0 is now in beta!
✨ Improved performance
✨ Perfectly accurate scrollToIndex
✨ Mount time on new arch goes from pretty fast to ZERO
✨ Sticky headers
✨ estimatedItemSize is now optional
✨ Fixes many bugs
✨ Improved performance
✨ Perfectly accurate scrollToIndex
✨ Mount time on new arch goes from pretty fast to ZERO
✨ Sticky headers
✨ estimatedItemSize is now optional
✨ Fixes many bugs
2 Fast 2 LegendList. Beta 2morrow.
August 17, 2025 at 3:55 PM
2 Fast 2 LegendList. Beta 2morrow.
Legend List for React DOM coming soon, launching September 4 at @reactuniverseconf.com. The goal is to be faster than every other list library on both mobile and web.
August 6, 2025 at 7:34 PM
Legend List for React DOM coming soon, launching September 4 at @reactuniverseconf.com. The goal is to be faster than every other list library on both mobile and web.
Legend List is feeling a bit sticky
July 27, 2025 at 10:00 PM
Legend List is feeling a bit sticky
I'm trying to make the fastest Mac app you've ever seen. So of course I'm building it in javascript with React Native.
It'll be an app for managing Github issues, PRs, discussions.
🔌 Local first
🛜 Works offline
⚡️ Instant interactions
💾 App is 50mb, 100mb ram
👐 Open source
It'll be an app for managing Github issues, PRs, discussions.
🔌 Local first
🛜 Works offline
⚡️ Instant interactions
💾 App is 50mb, 100mb ram
👐 Open source
May 18, 2025 at 1:06 PM
I'm trying to make the fastest Mac app you've ever seen. So of course I'm building it in javascript with React Native.
It'll be an app for managing Github issues, PRs, discussions.
🔌 Local first
🛜 Works offline
⚡️ Instant interactions
💾 App is 50mb, 100mb ram
👐 Open source
It'll be an app for managing Github issues, PRs, discussions.
🔌 Local first
🛜 Works offline
⚡️ Instant interactions
💾 App is 50mb, 100mb ram
👐 Open source
Hmm that's weird... I just wrote a couple tests to make sure and it seems to be working right. If you're assigning an array with the same values it won't be considered a change, but otherwise I'm not sure why that wouldn't work. Can you share more code?
May 14, 2025 at 7:47 AM
Hmm that's weird... I just wrote a couple tests to make sure and it seems to be working right. If you're assigning an array with the same values it won't be considered a change, but otherwise I'm not sure why that wouldn't work. Can you share more code?
I had misunderstood the FlashList internals and halved the drawDistance incorrectly.
These videos are also more exact, using a script for scrolling at a consistent speed. The previous video was at 1.3x, this is 1x.
The latest optimizations are not quite stable yet, will release them this weekend!
These videos are also more exact, using a script for scrolling at a consistent speed. The previous video was at 1.3x, this is 1x.
The latest optimizations are not quite stable yet, will release them this weekend!
May 2, 2025 at 5:26 PM
I had misunderstood the FlashList internals and halved the drawDistance incorrectly.
These videos are also more exact, using a script for scrolling at a consistent speed. The previous video was at 1.3x, this is 1x.
The latest optimizations are not quite stable yet, will release them this weekend!
These videos are also more exact, using a script for scrolling at a consistent speed. The previous video was at 1.3x, this is 1x.
The latest optimizations are not quite stable yet, will release them this weekend!
I made a mistake in the LegendList comparison which made FlashList look worse than it is 🤦.
But another mistake made LegendList look worse than it is too 😂. And I did another round of optimizing today, so it's still looking pretty good!
But another mistake made LegendList look worse than it is too 😂. And I did another round of optimizing today, so it's still looking pretty good!
May 2, 2025 at 5:26 PM
I made a mistake in the LegendList comparison which made FlashList look worse than it is 🤦.
But another mistake made LegendList look worse than it is too 😂. And I did another round of optimizing today, so it's still looking pretty good!
But another mistake made LegendList look worse than it is too 😂. And I did another round of optimizing today, so it's still looking pretty good!
Working from this island is the most productive I've ever been. Just code and eat, with a daily sunset walk on the beach.
But today my productivity dropped when I made friends with the hotel cat who sat on my laptop and demanded pets.
So we did a photoshoot 😍 Photos in 🧵!
But today my productivity dropped when I made friends with the hotel cat who sat on my laptop and demanded pets.
So we did a photoshoot 😍 Photos in 🧵!
April 30, 2025 at 4:20 PM
Working from this island is the most productive I've ever been. Just code and eat, with a daily sunset walk on the beach.
But today my productivity dropped when I made friends with the hotel cat who sat on my laptop and demanded pets.
So we did a photoshoot 😍 Photos in 🧵!
But today my productivity dropped when I made friends with the hotel cat who sat on my laptop and demanded pets.
So we did a photoshoot 😍 Photos in 🧵!
Legend List 1.0 is LIVE!
The ⚡️ fastest React Native list library, 100% JS, with powerful new features. For new and old arch.
✨ maintainContentVisiblePosition
✨ Bidirectional infinite scrolling
✨ Chat UI without the inverting hack
I hope it helps make your apps better!
github.com/LegendApp/le...
The ⚡️ fastest React Native list library, 100% JS, with powerful new features. For new and old arch.
✨ maintainContentVisiblePosition
✨ Bidirectional infinite scrolling
✨ Chat UI without the inverting hack
I hope it helps make your apps better!
github.com/LegendApp/le...
April 23, 2025 at 12:04 PM
Legend List 1.0 is LIVE!
The ⚡️ fastest React Native list library, 100% JS, with powerful new features. For new and old arch.
✨ maintainContentVisiblePosition
✨ Bidirectional infinite scrolling
✨ Chat UI without the inverting hack
I hope it helps make your apps better!
github.com/LegendApp/le...
The ⚡️ fastest React Native list library, 100% JS, with powerful new features. For new and old arch.
✨ maintainContentVisiblePosition
✨ Bidirectional infinite scrolling
✨ Chat UI without the inverting hack
I hope it helps make your apps better!
github.com/LegendApp/le...
I'm quite please with the code too! It uses Legend State to persist to/from a theme.json file, and set css variables so NativeWind classes update immediately. Pretty cool! 😍
Check it out: github.com/LegendApp/le...
Check it out: github.com/LegendApp/le...
April 22, 2025 at 3:40 PM
I'm quite please with the code too! It uses Legend State to persist to/from a theme.json file, and set css variables so NativeWind classes update immediately. Pretty cool! 😍
Check it out: github.com/LegendApp/le...
Check it out: github.com/LegendApp/le...
You can now make Legend Photos super ugly! By that I mean it has theme customization now 😀. Released in new version 0.3.0.
April 22, 2025 at 3:40 PM
You can now make Legend Photos super ugly! By that I mean it has theme customization now 😀. Released in new version 0.3.0.
Legend List 1.0 release tomorrow!
Last new feature before 1.0: After the first render it internally uses the average item size instead of the estimate, which should be more correct. And providing an estimated item size is now optional 😀
Last new feature before 1.0: After the first render it internally uses the average item size instead of the estimate, which should be more correct. And providing an estimated item size is now optional 😀
April 22, 2025 at 1:51 PM
Legend List 1.0 release tomorrow!
Last new feature before 1.0: After the first render it internally uses the average item size instead of the estimate, which should be more correct. And providing an estimated item size is now optional 😀
Last new feature before 1.0: After the first render it internally uses the average item size instead of the estimate, which should be more correct. And providing an estimated item size is now optional 😀
After months of trying to solve gaps/overlaps when scrolling or changing size, without native code, I’ve finally cracked it!
See this video of a VERY slow phone and no visible gapping. Try it now in Legend List beta.47 😀. And I think we should be ready for 1.0 next week!
See this video of a VERY slow phone and no visible gapping. Try it now in Legend List beta.47 😀. And I think we should be ready for 1.0 next week!
April 18, 2025 at 2:50 PM
After months of trying to solve gaps/overlaps when scrolling or changing size, without native code, I’ve finally cracked it!
See this video of a VERY slow phone and no visible gapping. Try it now in Legend List beta.47 😀. And I think we should be ready for 1.0 next week!
See this video of a VERY slow phone and no visible gapping. Try it now in Legend List beta.47 😀. And I think we should be ready for 1.0 next week!
Legend List is over 1,000 stars and it’s not even 1.0 yet 😱. But that’s about to change!
The most important milestone, ZHB (Zero @hirbod.dev Bugs), has been achieved and all 1.0 blocking Issues are complete. Now just need to finish the docs and prep for release...
github.com/LegendApp/le...
The most important milestone, ZHB (Zero @hirbod.dev Bugs), has been achieved and all 1.0 blocking Issues are complete. Now just need to finish the docs and prep for release...
github.com/LegendApp/le...
April 12, 2025 at 2:13 PM
Legend List is over 1,000 stars and it’s not even 1.0 yet 😱. But that’s about to change!
The most important milestone, ZHB (Zero @hirbod.dev Bugs), has been achieved and all 1.0 blocking Issues are complete. Now just need to finish the docs and prep for release...
github.com/LegendApp/le...
The most important milestone, ZHB (Zero @hirbod.dev Bugs), has been achieved and all 1.0 blocking Issues are complete. Now just need to finish the docs and prep for release...
github.com/LegendApp/le...
I just released a new version of Legend Photos with customizable hotkeys and fixing every bug I’m aware of since launch. Now on to adding more features 🎉
And this one sets up auto-updates correctly, so this is the last time you’ll need to update manually.
Download: github.com/LegendApp/le...
And this one sets up auto-updates correctly, so this is the last time you’ll need to update manually.
Download: github.com/LegendApp/le...
April 3, 2025 at 3:15 PM
I just released a new version of Legend Photos with customizable hotkeys and fixing every bug I’m aware of since launch. Now on to adding more features 🎉
And this one sets up auto-updates correctly, so this is the last time you’ll need to update manually.
Download: github.com/LegendApp/le...
And this one sets up auto-updates correctly, so this is the last time you’ll need to update manually.
Download: github.com/LegendApp/le...
Working on making everything in Legend Photos configurable, and have hotkey customizing almost finished. I'm liking the look of this so far 😀
March 27, 2025 at 4:11 PM
Working on making everything in Legend Photos configurable, and have hotkey customizing almost finished. I'm liking the look of this so far 😀
The first version of Legend Photos is ready 🎉.
✨ Loads files from local folders or Apple Photos
✨ Very fast and small (24mb)
✨ Extensible plugin system
✨ Hotkeys for everything
✨ Open source React Native macOS app
Fun new feature today: toggle this filmstrip view with F
✨ Loads files from local folders or Apple Photos
✨ Very fast and small (24mb)
✨ Extensible plugin system
✨ Hotkeys for everything
✨ Open source React Native macOS app
Fun new feature today: toggle this filmstrip view with F
March 24, 2025 at 12:42 PM
The first version of Legend Photos is ready 🎉.
✨ Loads files from local folders or Apple Photos
✨ Very fast and small (24mb)
✨ Extensible plugin system
✨ Hotkeys for everything
✨ Open source React Native macOS app
Fun new feature today: toggle this filmstrip view with F
✨ Loads files from local folders or Apple Photos
✨ Very fast and small (24mb)
✨ Extensible plugin system
✨ Hotkeys for everything
✨ Open source React Native macOS app
Fun new feature today: toggle this filmstrip view with F
Curiosity got the better of me so Legend Photos can now load from Apple photos (using PhotoKit) as well as local files 🎉.
It has a plugin-first architecture so this is just a source plugin for PhotoKit. And it should be easy to add more sources...
It has a plugin-first architecture so this is just a source plugin for PhotoKit. And it should be easy to add more sources...
March 23, 2025 at 4:47 PM
Curiosity got the better of me so Legend Photos can now load from Apple photos (using PhotoKit) as well as local files 🎉.
It has a plugin-first architecture so this is just a source plugin for PhotoKit. And it should be easy to add more sources...
It has a plugin-first architecture so this is just a source plugin for PhotoKit. And it should be easy to add more sources...