So... how does AI work anyway? @ishananand.bsky.social demystifies LLM internals for web devs using a real LLM implemented entirely in vanilla JS that runs in the browser. No Ph.D. needed! www.youtube.com/watch?v=clqB... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

You want to ship a Linear-like experience, so you install some CRDT libraries and expect things to Just Work™. @hausdorff.bsky.social of moment.dev digs into why this isn't that simple. www.youtube.com/watch?v=OGJx... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Red hot 🔥 take on how to architect large data applications entirely in JS. Kenny Daniel covers how he built Hyparquet & HighTable for loading Parquet files in the browser. www.youtube.com/watch?v=J06r... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

JavaScript wasn't always the cool kid on the block 😎 @anniesexton.com will share its superhero origin story about how a lil 10-day hackathon became the cornerstone of modern web dev. www.youtube.com/watch?v=Sl3X... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Do you *really* need to rebuild your site in that hot, new framework? 🤔 Watch as @seancdavis.com builds the same app w/ and w/o a framework, revealing their true role & curing your FOMO. www.youtube.com/watch?v=SeKt... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

AI is thriving on the server side, but the web is catching up! 💪 @philna.sh explores how to build browser AI apps, like an offline translator, leveraging current and future Web APIs. www.youtube.com/watch?v=bZGo... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

What is the Web without a browser? @nearestnabors.com takes us on a journey from Geocities to Google to GPT to understand the how the web is changing in the landscape of AI 🔥 www.youtube.com/watch?v=1bLX... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Did you know a phone could do that? 📱 @GantLaborde.com & @MazenChami.dev show us how to integrate on-device AI features into your React Native apps for real-time, offline intelligence. www.youtube.com/watch?v=e3t0... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Promises freed us from callback hell. But reactivity hell—debug loops, messy effects, brittle state—still haunts us. @pzuraq.bsky.social discusses reimagining state to break the cycle. www.youtube.com/watch?v=wW1A... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Can you be proud of what you built using AI? 🤔 @craigsdennis.dev is an engineer at Cloudflare and host of the new show AI Avenue and he's got some thoughts on this confusing time. www.youtube.com/watch?v=nKgC... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Join @bytesofbree.bsky.social to explore how to learn how creative frontend tools can turn websites into full-sensory experiences that feel as good as they function. 💫 www.youtube.com/watch?v=oWNH... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

What if you could use multimodal LLMs to interact with websites using motion control? 🎮 @devdevcharlie.com will take you through building motion-controlled prototypes using LLMs in JS. www.youtube.com/watch?v=_DbX... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Join @nerdy.dev for a fast paced, animated, and jam packed tik-talk on CSS features from the past ~5 years, including syntax, typography, color, architecture, and more! www.youtube.com/watch?v=QW6G... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

What does an agentic internet look like? 🤔 @webai.bsky.social walked us through how to create client-side AI agents in JS, powered by smaller LLMs, to perform useful work using Web AI. www.youtube.com/watch?v=4J9R... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Apparently, this video is so hot, it's been "blocked in some countries and/or regions" according to YouTube 🔥 So, we hope you're able to watch @kevin.mn break down OpenAI's GPT-5 ⚡️ youtu.be/kImnnMUcMfM Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

What's new in React and Next.js? @shrutikapoor08.bsky.social dives into the latest and greatest techniques for building modern and performant websites using these tools ⚡️ youtu.be/ZDZPxmFZ6yk?... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

Are micropayments on the web finally here? 💰 @ioanacis.bsky.social of @interledger.interledger.social.ap.brid.gy joined us to unroll Web Monetization’s path to standardization. youtu.be/v-dFoIWHTM4 Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

There's a lot of excitement around MCP, but web developers are wondering: what does it mean to me? @kentcdodds.com joined us to break it down ⚡️ www.youtube.com/watch?v=bcau... Subscribe to get notified when we ship more videos from #CascadiaJS 2025! 📺

That's a wrap for #CascadiaJS 2025! We like to say that this event is made up of hundreds of tiny modules that we `npm install` to create something special for our community 💚 Thanks to everyone who came, spoke or volunteered! We hope to see you all in 2026!

We have begun publishing our 2025 talks, and we're going to kick things off with this banger from @jherr.dev on what's all the fuss about the new @tanstack.com framework? youtu.be/uy2WSS1MjGM Remember to smash that subscribe button to get notified when we ship more videos from #CascadiaJS 2025! 📺

So cool!

Sweet scrapbook!

Tonight's the night! After 2 days, 44 talks and tons of great moments it's time to celebrate the end of another #CascadiaJS with our Closing Party featuring DJ Summersoft and karaoke by Baby Ketten! Thanks to @Cloudflare.social for sponsoring ❤️🎉🌲

Look who's here! @ThugDebugger.dev & team @RenderATL.com have made it up to #CascadiaJS 2025. And they're sponsoring coffee for our attendees! ☕️ Btw, an awards show for open source called The Commits? Brilliant 🤩

The Lightning Stage for #CascadiaJS 2025 is one fire! 🔥 Standing room only, folks.

Thank you to @philna.sh and the folks at @langflow.org for building a Virtual Helpdesk for #CascadiaJS 2025! Got a question about what time a talk is or when is lunch? Ask the bot on our website ⚡

It’s @cascadiajs.com time! It’s going to be a great day of web, AI, and most importantly meeting people. Come say hi at the @langflow.org booth and grab stickers or t-shirts!

It’s @carter.rabasa.com kicking off the largest @cascadiajs.com ever!

When we transitioned to being a Web + AI conference, we knew we wanted to work with sponsors who were building AI tools that web devs would be able to pick-up easily. Thanks to @langflow.org for being a Gold sponsor, shipping a great npm package & sending its maintainer @philna.sh to our event!

Our goal for #CascadiaJS 2025 is to help devs level up (web + AI), grow their network and have fun! That's a tall order, and we can't come close to making this happen without our sponsors. Thank you to Arcjet for being a Gold sponsor and helping us build the kind of tech conf that devs love! 💚

#CascadiaJS 2025 kicks off TONIGHT with our Welcome Reception at Town Hall! Pre-register, pickup your swag and skip the long lines tomorrow morning. It's also open to the public this year! We'll have music, drinks and will raffle off our few remaining tickets. Thanks to SignalFire for sponsoring!

We're on pace to have the *most* folks join us in-person since 2019 and we couldn't do it without the support of our sponsors! Thank you to the team at Onebrief for being a Gold sponsor and helping us make #CascadiaJS 2025 happen. And don't forget folks: they're hiring! Say hello at their booth 👋

Tons of great tips in the replies here and they aren’t specific to CYC. If you’re going to @cascadiajs.com or @squiggleconf.com or any of the other amazing conferences the tips still apply! I’ve done everything at conferences and still find new tips and remember forgotten ones from posts like this.

We're excited to be hosting the @cascadiajs.com opening day afterparty in just over a week! Continue your conversations from the conference or start a new one with members of our local web dev community. Just The Tap is one of our favorite spots, with great pizza and beer. RSVP to secure a spot 👇

CascadiaJS 2025 is coming up in less than 10 days 🤩, and we'd love for you to be there. Use the discount code LASTCHANCE at checkout and save $150! Offer ends Sept 12 at midnight PST or when they sell out! More info below 👇

AI coding agents can make you 10x more productive. 🚀 But it can also be 10x easier to paint yourself into a corner. 🖌️ Kevin Whinnery (@kevin.mn) is coming to #CascadiaJS to explore techniques for piloting agents effectively, so you can spend your brain power solving problems that matter. 🧠

Shruti Kapoor (@shrutikapoor08.bsky.social‬) is coming to #CascadiaJS to tell us how to build maintainable and accessible web apps—and build them fast. ⚡ 🚀 She'll delve into state management myths, hybrid rendering, code splitting, caching, server actions, and accessibility. Link below 👇

Sure, you know TanStack as the awesome React-Query framework that is used in 25% of all React apps. But Jack Herrington (@jherr.dev) is coming to #CascadiaJS to show us how it's a LOT more than that. In fact, it may end being your new go-to framework. More info 👇

Ishan Anand (@ishananand.bsky.social‬) is coming to #CascadiaJS to demystify LLM internals for web developers using a real LLM implemented entirely in vanilla JavaScript that runs in the browser. No Ph.D. needed! 🤓

Think fast! ⚡ Gant Laborde (@gantlaborde.com) is coming to #CascadiaJS to talk about integrating on-device AI qualities into your React Native apps. Deliver contextual experiences without the cloud—and unlock powerful new capabilities right from the user's phone. Learn more ⬇️

Explore how to code for sight, sound, touch, and more! 👀 👂 🫳 Bree Hall is coming to #CascadiaJS to show us how creative frontend tools can turn websites into full-sensory experiences that feel as good as they function. 🤩 More info below!

Believe it or not, JavaScript wasn't always the cool kid on the block. 😎 Annie Sexton (@anniesexton.com) is coming to #CascadiaJS to tell us how a lil 10-day hackathon became the cornerstone of modern web dev. More info 👇

For decades, users have interacted with our applications using links and forms, but that's not enough for users anymore. They want to use natural language. Kent C. Dodds (@kentcdodds.com) is coming to #CascadiaJS to tell us how that changes what we build. More info 👇

Jason Mayes (@webai.bsky.social) is coming to #CascadiaJS to show us how to create and run client-side AI agents in JS, powered by smaller LLMs, to perform useful work faster on existing websites using Web AI. ⚡ Get a glimpse of the future—an agentic internet. 🤖 More info 👇

Adam Argyle (@nerdy.dev) is coming to #CascadiaJS and bringing a fast paced, animated, and jam packed tik-talk on CSS features from the past ~5 years. CSS has moved so fast, don't feel bad you aren't all caught up, no one is! 🤭 More info 👇

We're excited to announce that Neon is joining us for the Cascadia AI Hackathon! It's coming up Sept 20-21, and we can't wait to see what 150+ devs can build using AI 🔥 Link to register in the replies

Jarod Reyes is a JS developer turned storyteller who is building developer community at the world’s first AI VC! ✨ He's coming to #CascadiaJS to give us insights into engineering culture at Anthropic, Meta and NVIDIA. 💡 More below! 👇

🚨 FLASH SALE! 🚨 Starting NOW, you can grab a No Frills ticket for only $50. We're only selling 50 of these discounted tickets, so grab one before they sell out. Offer ends Aug 28 at midnight PST. Link below 👇

This speaker lineup is 🔥 Hear from @shrutikapoor08.bsky.social, Bree Hall, @nearestnabors.com, @kentcdodds.com, @webai.bsky.social, @jherr.dev, @nerdy.dev, @devdevcharlie.com, our emcee @jason.energy, and many more! Use the discount code STACKED at checkout and save $50 🎟️ Link ⬇️

Thanks to Mastra, we're offering FREE, professional, on-site child care for kids 10 and under. 🤩 Spots are limited, so reserve yours soon! Details below 👶