#ECMAScript excitement 😀

#TC39 advanced these proposals this week 🎉

4️⃣ Atomics.waitAsync
4️⃣ RegExp v flag
4️⃣ Well-Formed Unicode Strings
3️⃣ Decorator Metadata
3️⃣ Float16Array
2️⃣ Base64 for Uint8Array
2️⃣ Promise.withResolvers
2️⃣ TimeZone Canonicalizn
1️⃣ Intl.ZonedDateTimeFormat



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Node.JS v20 - The Numbers

This article aims to provide a comparative analysis of different versions of Node.js. It highlights the improvements and setbacks and provides insights into the reasons behind those changes, without drawing any comparisons with other JavaScript runtimes.


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https://blog.rafaelgss.dev/state-of-nodejs-performance-2023

A complete roast of JS that highlights the strongest criticisms against the world's most popular programming language.

https://www.youtube.com/watch?v=aXOChLn5ZdQ

Svelte 4 is here 🎉🎉

Time flies - Svelte 3 was released more than four years ago! In JavaScript-framework-time, that's eons. Svelte’s freshness has persisted throughout, but Node.js and browser APIs have evolved during that time and today we’re updating Svelte to take advantage of some of these improvements.

Svelte 4 is mainly a maintenance release, bumping minimum version requirements and tightening up the design in specific areas. It sets the stage for the next generation of Svelte to be released as Svelte 5 - we think you’ll love it.

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https://svelte.dev/blog/svelte-4

#ECMAScript excitement 😉

Congrats to #NicoloRibaudo on advancing Optional Chaining for assignments to Stage 1 #TC39 today 🎉

Today Optional Chaining works on the Right-Hand Side of assignment.

value = obj?.prop

This proposal allows it on the left 👍

obj?.prop = value 🆕


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#ECMAScript excitement 😉

This week #TC39 advanced these proposals 🎉

3️⃣ Array Grouping
3️⃣ Promise.withResolvers
3️⃣ Source Phase Imports
3️⃣ Time Zone Canonicalization
2️⃣ Deferred Import Evaluation
1️⃣ DataView get/set Uint8Clamped methods
1️⃣ Optional Chaining assignment


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Trying to quickly prototype and experiment chunks of JS programs with a live feedback, then try

https://www.jsplayground.dev/

instead opening a tool or IDE.

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We often romanticize the notion of programming, presenting it as an abstract form of art, a science, or even a form of magic.
The truth, however, is much more practical and grounded. Code, in its essence, is communication.

- Adnan Osmani (Author of Learning JavaScript Design Patterns: A JavaScript and React Developer's Guide)

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Called the “Web Environment Integrity” (WEI), this is a potential gatekeeping move that has many concerned, including the three critical competitors to Google's Chrome web browser.

This situation has unfolded over the past two weeks, resulting in widespread criticism over the implementation of such a protocol.


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https://news.itsfoss.com/google-controversial-tracker/

TypeScript 5.2 is now here! 🎉 Now faster with

- 'using' & explicit resource management
- decorator metadata
- easier tuple type notation
- better object completions
- the inline variable refactor
- clickable inlay parameter hints


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https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/

Bun 1.0 is finally here. 🎉🎊

Bun is a fast, all-in-one toolkit for running, building, testing, and debugging JavaScript and TypeScript, from a single file to a full-stack application. Today, Bun is stable and production-ready.


https://bun.sh/blog/bun-v1.0

Bun vs pnpm

I'm seeing a lot of bun vs pnpm install speed comparisons but would like to provide some nuance: the absurd perf difference usually is a result of one tool running with a network API call overhead, while the other not.

bun install defaults to the behavior similar to pnpm's --prefer-offline flag, which skips hitting the npm API. To simulate the default behavior of pnpm, you have to use bun --force.

Here are some comparisons on my machine (network from Singapore) with different conditions:

bun (no cache, no lockfile): 5.4s
pnpm (no cache, no lockfile): 6.7s

bun (with cache, no lockfile): 30ms
pnpm (--prefer-offline, with cache, no lockfile): 587ms

bun (--force, with cache, no lockfile): 2.73s
pnpm (with cache, no lockfile): 5.9s

bun is still faster, but not so significant as some benchmark graphs may have led you to believe.

bun itself is amazing in many ways and deserve hype, but I'd love to see we compare apples to apples and not gloss over the details for engagement.

context for the benchmark: it's using the Vite + Vue + TypeScript boilerplate generated from bun create vite.

- Evan You (https://twitter.com/youyuxi/status/1701243745880932687)


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#Bun is disrupting JavaScript land . . .

- Bun.js vs Node.js
- Bun vs Deno
- How is Bun so fast?


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https://www.youtube.com/watch?v=dWqNgzZwVJQ

ECMAScript excitement 😉

Safari 17.0 ships support for #TC39 Stage 3 proposal Set Methods 🎉

The seven new Set.prototype methods are:

🔸 intersection
🔸 union
🔸 difference
🔸 symmetricDifference
🔸 isSubsetOf
🔸 isSupersetOf
🔸 isDisjointFrom


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https://github.com/tc39/proposal-set-methods

Next.js 13.5 Released !!

◆ 22% faster local server startup
◆ 29% faster HMR (Fast Refresh)
◆ 40% less memory usage
◆ Optimized package imports
◆ next/image improvements
◆ And over 438 bugs patched!


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https://nextjs.org/blog/next-13-5

Meet hwy.dev, a new TypeScript metaframework built on top of hono.dev and htmx.org 🚀

Quickstart:
npx create-hwy@latest

Features:

✅ Server-rendered JSX / TSX
✅ Nested, file-based routing
✅ Remix-style actions and parallel loaders
✅ Async page components
✅ Rich Hono middleware ecosystem
✅ 100% type-safe
✅ Built-in critical CSS inlining
✅ Live browser refresh during dev
✅ And much more...

#ECMAScript excitement 😉

Next week's #TC39 meeting is hosted by #TechAtBloomberg in Tokyo & has a packed agenda:

🔸 AsyncContext
🔸 Decimal
🔸 Import Attributes
🔸 Intl.MessageFormat
🔸 Negated in
🔸 Pattern Matching
🔸 Structs
🔸 TDZ
🔸 Throw expressions
🔸 Type Annotations


https://github.com/tc39/agendas/blob/main/2023/09.md

#ECMAScript excitement 😉

These proposals moved this week #TC39 🎉🎉

4️⃣ Resizable ArrayBuffer
2️⃣ RegExp.escape
2️⃣🔙 ShadowRealm
1️⃣ Joint Iteration
1️⃣ Locale Extensions
1️⃣ Iterator Sequencing
1️⃣ Negated in
1️⃣ Stable Formatting
🗑️ FinalizationRegistry #cleanupSome
🗑️ Symbol.thenable

Tauri 1.5.0 Released 🎉🎊🎉🎊

- Bun support
- Notarytool
- Code signing improvements
- macOS frameworks
- Mixed content on Windows


https://beta.tauri.app/blog/tauri-1-5/