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Wes Bos & Scott Tolinski - Full Stack JavaScript Web Developers

Full Stack Developers Wes Bos and Scott Tolinski dive deep into web development topics, explaining how they work and talking about their own experiences. They cover from JavaScript frameworks like React, to the latest advancements in CSS to simplifying web tooling.

Syntax - Tasty Web Development Treats

Want to level up your web dev game? Scott and Wes share their top tips for going deeper with your learning—covering everything from reading the docs and source code to finding mentorship and engaging with the community.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
02:48 • Brought to you by 
Sentry.io • .
 • 
03:54 • How do you go deeper?
 • 
04:23 • Pick a project and build it.
 • 
06:36 • Read the docs. 
 • 
Svelte Docs • .
 • 
 • 
09:07 • Read the source.
 • 
11:19 • Consume content: blogs, conference talks, etc. 
 • 
Dot Conferences on YouTube • .
 • 
GitNation JavaScript Conferences • .
 • 
 • 
16:24 • Discord and Reddit.
 • 
19:31 • Get mentorship and ask questions.
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

858: How to Go Deeper With Your Learning

Scott and Wes break down the tech behind video streaming for the web, from transcoding and variants to CDN and access control. They also share insights on tools like Mux, Cloudflare Stream, and ffmpeg, plus tips for managing bandwidth, hosting, and costs.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
00:50 • Brought to you by 
Sentry.io • .
 • 
01:15 • The history of video streaming.
 • 
02:10 • How video streaming works: The Tech.
 • 
03:54 • How video streaming works: Transcoding.
 • 
06:37 • How video streaming works: Variants. 
 • 
ffmpeg • .
 • 
Wes’ R2-video-streaming • .
 • 
 Wes’ Transcoding • .
 • 
YT-DL • .
 • 
YT-DLP • .
 • 
 • 
13:13 • Dynamic ad insertion.
 • 
14:29 • Bandwidth and hosting. 
 • 
Mux • .
 • 
 • 
18:03 • 
Cloudflare • .
 • 
19:13 • The costs. 
 • 
Wes Bos Tweet Cloudflare TOS • .
 • 
Steve Tenuto tweet • .
 • 
 • 
25:39 • Media players. 
 • 
Media Chrome • .
 • 
 • 
29:42 • CDN.
 • 
32:04 • Access control.
 • 
33:35 • Solutions. 
 • 
Mux • .
 • 
Cloudflare Stream • .
 • 
Bunny.net Stream • 
AWS Media Convert • .
 • 
Cloudinary • .
 • 
Bitmovin • .
 • 
 • 
41:55 • Some other features.
 • 
45:47 • Sick Picks & Shameless Plugs.
 Sick Picks • Scott: 
Anker MagGo • .
 • Wes: 
PolyCapture • .
 Shameless Plugs • Scott: 
Syntax on YouTube • .
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

859: Streaming Video in 2025

Wes and Scott talk with Zack Jackson about Module Federation, and the innovative ways it streamlines collaboration across large teams and complex applications. Zack also dives into simplifying microfrontends, optimizing builds with Rspack, and his work at ByteDance.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
00:48 • Zach background and role at ByteDance
 • 
03:10 • ByteDance’s web and native apps 
 • 
 How ByteDance Became the World’s Most Valuable Startup • 
Lynx • 
ByteDance GitHub • 
Coze • 
Lark • 
MarsCode • 
 • 
06:48 • What is Module Federation? 
 • 
Zephyr Cloud • 
 • 
15:49 • Evolution from V1 to V2 of Module Federation
 • 
24:47 • When to consider Module Federation
 • 
29:46 • How would you publish a utils package in Module Federation?
 • 
32:59 • How would you do a major upgrade?
 • 
36:36 • Brought to you by 
Sentry.io • 
37:01 • Who owns the update process?
 • 
39:40 • Handling multiple frameworks
 • 
42:10 • ModernJS and Meta frameworks 
 • 
ModernJS • 
Rspress • 
 • 
47:20 • Does ByteDance have its own JavaScript runtime? 
 • 
NAPI • 
 • 
50:02 • Why Zack built Rspack 
 • 
Rspack • 
Rsbuild • 
 • 
58:15 • The future of Rspack and custom bundlers 
 • 
Unpack • 
 • 
01:04:24 • Module Federation’s major features
 • 
01:07:29 • Sick Picks & Shameless Plugs
 Shameless Plugs • Zack: 
 • 
Zephyr Cloud • 
Midscene.js • 
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

860: Module Federation Microfrontends with ByteDance’s Zack Jackson

Scott and Wes dive into the world of local data storage, breaking down the pros and cons of Sqlite, LocalStorage, SessionStorage, Cookies, and IndexedDB. They cover real-world use cases like user settings, offline data, and auth tokens, while sharing their favorite tools and strategies for keeping your data fast and secure.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
00:30 • Brought to you by 
Sentry.io • .
 • 
01:43 • Why store data locally. 
 • 
01:55 • User preferences and settings.
 • 
02:50 • Not logged in state (shopping carts, etc).
 • 
03:30 • Data for faster loading.
 • 
03:51 • Privacy concerns.
 • 
04:25 • Large files or drafts.
 • 
05:50 • Auth tokens.
 • 
 • 
07:08 • Where to store data. 
 • 
07:11 • Cookies.
 • 
07:48 • Local storage.
 • 
09:15 • Session storage.
 • 
10:35 • 
IndexedDB • .
 • 
 • 
12:15 • 
BYOJS Storage • .
 • 
13:41 • SQlite via WASM.
 • 
14:12 • Penalties of SQLite in browser via WASM.
 • 
15:29 • 
PGLite • .
 • 
16:23 • Dealing with migrations.
 • 
16:55 • The advantages of the approach.
 • 
18:42 • 
Dexie • .
 • 
19:59 • Patch messages.
 • 
21:25 • A few options. 
 • 
TinyBase Docs • .
 • 
Local First Web • .
 • 
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

861: Local Data: Sqlite, LocalStorage, Session, Cookies and IndexDB

Is Svelte becoming React? Scott and Wes explore the exciting updates in Svelte 5, including Runes, Snippets, odd font choices, and performance benchmarks, while discussing custom event updates, migration tips, and potential performance gains.
 Show Notes • 
00:00 • Welcome to Syntax! 
 • 
Scott’s Svelte5 Overview • .
 • 
 • 
01:27 • Brought to you by 
Sentry.io • .
 • 
02:06 • What’s new in 
Svelte 5 • ? 
 • 
02:13 • 
Runes • . 
 • 
04:47 • 
$state • 
07:00 • $state.snapshot
 • 
11:47 • 
$derived • 
12:46 • $derived.by
 • 
15:41 • 
$effect • 
17:24 • $effect.pre
 • 
18:05 • $effect use cases.
 • 
22:20 • 
$props • 
24:57 • 
Binding state • .
 • 
27:15 • 
$inspect • 
 • 
vsode-wrap-svelte • .
 • 
 • 
28:46 • $inspect(…).with
 • 
 • 
30:42 • 
Snippets • .
 • 
34:22 • Events now onclick instead of on:click.
 • 
36:09 • Custom events now just props instead of createEventDispatcher.
 • 
 • 
36:31 • Serif Font on 
website • .
 • 
40:01 • Performance. 
 • 
 Benchmarks Doc • .
 • 
Benjamin McCann Tweet • .
 • 
 • 
46:41 • Is Svelte becoming React?
 • 
49:21 • 
Migration • .
 • 
51:41 • What’s next and wish list for Svelte.
 • 
57:12 • Sick Picks & Shameless Plugs.
 Sick Picks • Scott: 
Dragon Quest 3 • .
 • Wes: 
Dresscode.dev • .
 Shameless Plugs • Scott: 
Syntax on YouTube • .
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
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862: Svelte 5 Is Here!

Scott and Wes look back at 2024 and share highlights from a big year for Syntax and the web dev world. They review their 2024 predictions to see what they got right (and wrong), and break down the major moments in web development from CSS improvements to AI editors and beyond.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
01:30 • Changes to the Syntax podcast.
 • 
05:56 • What happened this year? 
 • 
06:07 • React.
 • 
06:36 • Solid Start.
 • 
07:04 • Tanstack Start.
 • 
07:43 • Remix
 • 
09:42 • AI Editors.
 • 
11:53 • Vite 6.
 • 
14:02 • Bluesky.
 • 
19:52 • CSS.
 • 
 • 
22:17 • What did we do? 
 • 
22:21 • React Miami. 
 • 
React Miami Episode • .
 • 
 • 
22:26 • JSNation 
 Amsterdam • .
 • 
23:55 • JSNation 
US • + React Summit.
 • 
24:57 • 
Terminal Feud • .
 • 
26:28 • 
Laravel + Terminal basketball game • .
 • 
27:02 • 
Syntax San Francisco meetup • .
 • 
27:23 • 
GitHub Universe • .
 • 
28:07 • 
FITC • .
 • 
28:38 • 153 Syntax Episodes + Video.
 • 
 • 
29:32 • 
Our 2024 Predictions • Reviewed. 
 • 
29:46 • Types in JS will have real movement.
 • 
31:29 • Temporal API will ship in 1 browser.
 • 
32:50 • Perf tooling gets easy for everyone to understand.
 • 
33:29 • CSS continues to get better where you need less JS.
 • 
34:25 • Svelte v5 is very fast.
 • 
34:38 • The year of the server in frameworks.
 • 
35:28 • Astro is going to have a good year.
 • 
36:13 • React server components.
 • 
37:03 • Remix moves away from page-based loaders, to component loaders.
 • 
37:18 • Hono will become more ubiquitous.
 • 
38:28 • We will see a route matching Proposal move ahead.
 • 
39:23 • Bun releases full node compat.
 • 
40:42 • We will see a new Linter + formatter entirely replace.
 • 
42:16 • New TypeScript typechecker. 
 • 
Ezno • .
 • 
 • 
43:40 • Lightning CSS pops - or does it?
 • 
45:10 • You’ll hear more about Rspack and Turbopack.
 • 
45:51 • Vite isn’t going to release anything big in 2024.
 • 
46:24 • Relative color will land in all major browsers.
 • 
48:14 • CSS contrast-color will land in chrome.
 • 
48:48 • Scroll animation landing in 2 browsers.
 • 
50:03 • The year of CSS discovery.
 • 
51:09 • Safari will Ship 3 missing PWA Support.
 • 
52:11 • Firefox usage will continue to slip.
 • 
56:53 • Paid Arc features.
 • 
57:14 • More XR web experiences as Apple releases in Vision Pro.
 • 
59:55 • AI Tooling.
 • 
01:00:57 • Small Models that run in the browser.
 • 
01:01:38 • Apps get Sherlocked by OpenAI.
 • 
01:02:04 • On prem corporate AI.
 • 
 • 
01:04:49 • Sick Picks + Shameless Plugs.
 Sick Picks • Scott: 
TCGPocket App • .
 • Wes: Huge Bag of Croc Charms
 Shameless Plugs • Scott: 
Syntax on YouTube • .
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

863: 2024: A Year in Review

Scott and Wes ring in the new year, answering listener questions on the rise of durable objects, handling tricky tab state in e-commerce apps, and their top picks for headless CMS. They also chat about the future of CSS, deployment platforms, and whether Syntax beanies might finally be a thing!
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
00:52 • Brought to you by 
Sentry.io • .
 • 
03:10 • What Are Durable Objects?
 • 
08:25 • CSS Anchor Positioning: Cross-Browser Support Update. 
 • 
Implement CSS Anchor Positioning • .
 • 
 • 
12:48 • Freelancers: UX and Design Skills vs. Functional Expertise.
 • 
16:47 • Choosing the Best Deployment Platform. 
 • 
 Syntax Episode 615 • .
 • 
 • 
20:49 • Making Websites WCAG Compliant. 
 • 
Polypane • .
 • 
 • 
22:35 • Managing Tab State in Complex Apps.
 • 
28:43 • Will CSS Ever Be Complete?
 • 
33:21 • When Will Syntax Beanies Drop? 
 • 
Syntax Swag Store • .
 • 
 • 
35:21 • The Best Headless CMS for a Tech Blog.
 • 
42:15 • From Many Packages to Monolithic Frameworks.
 • 
46:41 • Sick Picks + Shameless Plugs.
 Sick Picks • Scott: 
 The Sheet with Jeff Marek • .
 • Wes: 
28” 4K+ BenQ Programming Monitor • .
 Shameless Plugs • Scott: 
Syntax on YouTube • .
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

864: Durable Objects × Tab State Hacks × Headless CMS Choices + More

Scott and Wes challenge each other’s knowledge on everything from array sorting quirks to browser isolation types in a rapid-fire trivia format. They dive deep into performance optimizations, TypeScript type safety, and HTML best practices while uncovering surprising edge cases that every web developer should know about.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
00:43 • Brought to you by 
Sentry.io • .
 • 
01:23 • Question 1: Array Sort Default Behavior.
 • 
03:24 • Question 2: Splitting Into Individual Words & Characters.
 • 
06:06 • Question 3: NodeJS Stream Backpressure.
 • 
09:07 • Question 4: Custom Middleware Rate Limiting.
 • 
13:00 • Question 5: Transform Function Property Changes.
 • 
15:18 • Question 6: TranslateZ & Will-Change Performance.
 • 
17:52 • Question 7: Table Structure Best Practices.
 • 
20:23 • Question 8: Dialog vs Div with Dialog Role.
 • 
23:21 • Question 9: TypeScript Unknown vs Any & Never.
 • 
26:31 • Question 10: Response Type Safety in TypeScript.
 • 
29:48 • Question 11: Browser Isolation Types.
 • 
32:54 • Question 12: HTML Quirks Mode Behavior.
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

865: CSS Performance × Rate Limiting × Array Sort Behavior - STUMP'd

Scott and Wes look into their crystal ball to predict what’s coming in web development next year. From the rise of on-device AI to the vanilla CSS comeback, Bun’s big moves, and React’s evolution, this episode is packed with bold predictions and hot takes!
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
02:00 • Brought to you by 
Sentry.io • .
 • 
03:09 • The agenda.
 • 
03:40 • Temporal Javascript api will ship in Safari and Chrome. 
 • 
Temporal Proposal • .
 • 
 • 
06:23 • On device AI. 
 • 
WebGPU API • 
Dawn Native WebGPU • 
 • 
10:26 • Models will plateau. 
 • 
Bolt.new • , 
v0 • , 
Lovable.dev • .
 • 
 • 
13:40 • Web Awesome will become the most used web components library. 
 • 
Web Awesome • .
 • 
 • 
15:57 • We will be using more web components.
 • 
16:59 • A push towards the ‘standard stack’.
 • 
19:38 • We can really use relative color.
 • 
21:39 • Vanilla CSS comeback.
 • 
23:35 • A complete Mixins / Functions API for CSS.
 • 
24:27 • Conditionals will ship in all browsers.
 • 
25:50 • People will still make vertical centering jokes.
 • 
27:08 • VSCode will be feature parity with Cursor.
 • 
28:22 • Framework choice will matter less with AI tools.
 • 
29:12 • OpenAI will launch a browser. 
 • 
Dupe.com • .
 • 
 Buy Now! The Shopping Conspiracy • .
 • 
Krazy Binz • .
 • 
 • 
37:18 • React will drop Babel. 
 • 
BabelJS • .
 • 
 • 
38:05 • React Server Components will pop.
 • 
39:46 • Remix will relaunch as something entirely different.
 • 
41:11 • React Native will have it’s time.
 • 
42:06 • Svelte will get component-based islands or data loading.
 • 
44:19 • Server Runtimes, Bun will continue to do non-standard, lovable things.
 • 
44:44 • Bun will release a PAS to compete with NPM, Vercel, and Vite.
 • 
46:06 • Laravel will release a CMS.
 • 
47:57 • Vite will stay king.
 • 
48:03 • Rolldown ships in the next version of Vite. 
 • 
Rolldown • .
 • 
Statamic • .
 • 
 • 
49:35 • Sick Picks & Shameless Plugs.
 Sick Picks • Scott: 
PHILIPS A19 Ultra Definition Dimmable Light Bulb • .
 • Wes: 
Stats App • .
 Shameless Plugs • Scott: 
Syntax on YouTube • .
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

866: 2025 Web Development Predictions

What’s the deal with Zero Sync? Scott and Wes dive into this cutting-edge database tech, exploring its real-time interactivity, blazing-fast performance, and how it stacks up against the competition. Plus, they break down setup, querying, authentication, and whether it’s ready for prime time.
 Show Notes • 
00:00 • Welcome to Syntax!
 • 
01:59 • Brought to you by 
Sentry.io • .
 • 
02:21 • Today’s agenda.
 • 
02:52 • What is Zero Sync? 
 • 
The Docs • .
 • 
InstantDB • .
 • 
 • 
07:02 • Zerobugs loading speed.
 • 
11:04 • Real-time interactivity.
 • 
11:38 • Why is it different?
 • 
12:11 • How to get it set up. 
 • 
12:58 • Querying Data.
 • 
16:22 • Writing data.
 • 
16:31 • Upsert.
 • 
17:39 • Authentication and permissions. 
 • 
Johannes Schickling Ep 767 • .
 • 
 • 
19:27 • Preloading.
 • 
19:41 • Migrations and deployment.
 • 
 • 
20:17 • Some extras.
 • 
21:16 • CreateSubscriber.
 • 
23:08 • Can you use this today? 
 • 
Zero Syn Roadmap • .
 • 
Scott’s YouTube Video • .
 • 
 Hit us up on Socials! 
 Syntax: X Instagram Tiktok LinkedIn Threads
 
 Wes: X Instagram Tiktok LinkedIn Threads
 
 Scott: X Instagram Tiktok LinkedIn Threads
 
 Randy: X Instagram YouTube Threads

867: Zero Sync is the Future of Data Loading

In this Hasty Treat, Scott and Wes are back with part 2 on how to develop for slow internet connections.
 Kyle Prinsloo Freelancing - Sponsor 
 Kyle Prinsloo teaches you everything you need to know about freelancing, including how to quit your job, earn a side-income and start taking control of your life. Check it out at studywebdevelopment.com/freelaning. Use the coupon “SYNTAX” and get 25%.
 Show Notes 
 03:27 - Images
 
 • Resize client-side when uploading
 • Lazy load or progressive JPG
 • Width + height so the content doesn’t shift with placeholders
 • Compress your images - lossless and lossy
 • Use SVG where possible
 
 08:33 - Scripts + CSS assets
 
 • 
 Hasty Treat - 5 Things That Make Your Site Slow • 
 Hasty Treat - 5 More Things That Make Your Site Slow 
 08:51 - Video
 
 • Variable-rate video is key
 
 09:13 - Connections that go in-n-out a lot
 
 • Save form state on page refresh
 • Show UI when user goes offline 
 • 
window.addEventListener('offline', updateOnlineStatus); • 
window.addEventListener('online', updateOnlineStatus); • 
 • Retrying in _____
 
 10:27 - Service workers!
 
 • Serves up local cache initially
 
 12:05 - Fonts
 
 • Font-display CSS 
https://css-tricks.com/font-display-masses/ • Sometimes possible: tree shake your fonts - load only the characters you need
 • 
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; 
 14:04 - CSS tricks
 
 • Text over background image — make sure you also set a color so the text will show while the image is loading
 
 14:37 - Testing slow connections
 
 • Dev tools
 • Mimic a speed, or 3G
 Links • 
ImageOptim • 
Slack • 
Discord • 
Cloudflare • 
Workbox by Google • 
Chrome Dev Tools • 
Firefox Dev Tools Tweet us your tasty treats! • 
Scott’s Instagram • 
LevelUpTutorials Instagram • 
Wes’ Instagram • 
Wes’ Twitter • 
Wes’ Facebook • 
Scott’s Twitter • Make sure to include 
@SyntaxFM • in your tweets

Hasty Treat - Slow Connections Part 2

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