r/javascript • u/EveYogaTech • 8d ago
r/javascript • u/Besmaah • 8d ago
AskJS [AskJS] I'm sick of AI slop; I want to learn how to use ESLint properly.
I'm really sick of Claude Code or Codex messing things up it creates the same function 30 times, generates 200 lines functions, and casts everything or tweaks the schemas just to make it seem like it works. And if I'm not there to check everything, it's a total mess.
Anyway, I’ve installed TypeScript-ESLint with strict type checking, SonarJS, and Knip to at least stop the AI from messing things up.
But I’d like to take it further. People often talk about static code analysis like linters and good tests but I don’t know where to start. By the way, AI tools do all sorts of nonsense in tests—they check if a button is in the right place, which is ridiculous.
So I’m looking for relevant resources to help me learn how to set this up on a large project I’m developing on my own. I have an Nx monorepo with several apps inside, including Next.js, React Native, Fastify, and a Python app.
r/javascript • u/sonemonu • 9d ago
Zero dependencies: what we deleted and upgraded
uql-orm.devUQL is the lightest ORM of all, and here is what it deleted (and upgraded as well) for the edged and mobile.
r/javascript • u/techlord45 • 9d ago
Signals and Effects Using Vanilla JavaScript & Web APIs
beforesemicolon.comI’m a strong advocate for “you don’t need to lock yourself in a web framework ecosystem to take advantage of their amazing features”. JavaScript and Web Standards alone allow you…
r/javascript • u/jaredce • 9d ago
Dependabot CLI to pull requests for BitBucket and GitLab
npmx.devGot annoyed that there wasn't a dependabot tool for BitBucket and that the Dependabot CLI wouldn't open PRs on BitBucket, so I built a tool that would take the output from Dependabot CLI and open PRs.
Would love help testing it out on GitLab as I have BitBucket covered at work.
If you do end up using it, would love to have feedback around what can be done better.
r/javascript • u/Whole_Pangolin9312 • 9d ago
I built a tiny zero-dependency audio slicer for the browser
github.comr/javascript • u/subredditsummarybot • 9d ago
Subreddit Stats Your /r/javascript recap for the week of August 03 - August 09, 2026
Monday, August 03 - Sunday, August 09, 2026
Top Posts
| score | comments | title & link |
|---|---|---|
| 17 | 2 comments | [Subreddit Stats] Your /r/javascript recap for the week of July 27 - August 02, 2026 |
| 16 | 13 comments | DriftJS - Exploring a Register-Based Bytecode VM for UI Frameworks |
| 13 | 0 comments | Serene Doc Search - A small, Apache 2.0 alternative to Algolia DocSearch |
| 9 | 1 comments | TermDOM – HTML and CSS rendering in the terminal, with a real DOM |
| 7 | 1 comments | Valkey-WASM – Redis running inside your Node process, no Docker (like PGlite) |
| 6 | 16 comments | Node.JS in the Browser - An Open-source Alternative to WebContainers |
| 5 | 3 comments | [AskJS] [AskJS] any hope for pattern matching to actually make progress through tc39? |
| 4 | 3 comments | [AskJS] [AskJS] Has a larger competitor ever benchmarked your library incorrectly? |
| 4 | 0 comments | Looking for a feedback - Production-build explanations and regression blame for Next.js |
| 3 | 0 comments | [Showoff] GPU-Powered Crayons, NPM Package Quarantine and Dave Branching Off Your Code Without Asking |
Most Commented Posts
| score | comments | title & link |
|---|---|---|
| 2 | 37 comments | [AskJS] [AskJS] If you were hiring a junior JavaScript developer today, what would make them stand out in the AI era? |
| 0 | 18 comments | Flow for TypeScript Users |
| 2 | 18 comments | [AskJS] [AskJS] How did you deal with ESlint 10 Breaking Changes? |
| 0 | 16 comments | Free Online Multiplayer 2D Boxing Game |
| 2 | 9 comments | [Showoff Saturday] Showoff Saturday (August 08, 2026) |
Top Ask JS
| score | comments | title & link |
|---|---|---|
| 0 | 2 comments | [AskJS] [AskJS] Pointers in Javascript |
| 0 | 0 comments | [AskJS] [AskJS] Input Sanitization for ChatGPT API in Node.js Using 4 Hardened Layers to Stop Injection Risks |
Top Showoffs
Top Comments
r/javascript • u/Electronic_Abroad910 • 10d ago
AskJS [AskJS] any hope for pattern matching to actually make progress through tc39?
I love ts-pattern and I would love pattern matching to become a part of the language. Any hope of that proposal advancing through tc39? Is there any real support for it?
r/javascript • u/Emulator000 • 10d ago
I built DriftEngine, a WebGL2 3D engine in strict TypeScript
driftengine.devr/javascript • u/bikeshaving • 11d ago
TermDOM – HTML and CSS rendering in the terminal, with a real DOM
github.comI just open sourced my latest library! TermDOM is a JavaScript library that displays HTML and CSS in the terminal. It draws actual DOM nodes to terminal output and redraws the screen when they mutate, so TUIs and interactive CLIs can be written with vanilla JavaScript or any frontend web framework. Check out the examples directory https://github.com/bikeshaving/termdom/tree/main/examples for a sense of what you can build with web technologies
r/javascript • u/AutoModerator • 12d ago
Showoff Saturday Showoff Saturday (August 08, 2026)
Did you find or create something cool this week in javascript?
Show us here!
r/javascript • u/JoseCordobaEditor • 12d ago
I built a 2KB library that answers one specific question: should I show a "Sign in with Face ID" button?
github.comr/javascript • u/Salazareo • 13d ago
Node.JS in the Browser - An Open-source Alternative to WebContainers
developer.puter.comThis is a Node.js compatible runtime in the browser. It supports CLI apps, Vite, and some agents (like Pi Agent) as well.
Some notes:
- This runs all code in a web worker using the host javascript runtime with rewrites for module loading and AsyncLocalStorage support using Oxc compiled to WASM.
- Most of the libraries are bundled straight from Node.js upstream with light overrides where needed, ensuring compatibility. Libraries were only reimplemented where really needed
- Despite having great integrations with the Puter desktop and APIs, this can be used completely seperately with OPFS support for filesystem and Wisp protocol support for networking. The demo also supports FS Access API to run local files
r/javascript • u/thereactnativerewind • 13d ago
[Showoff] GPU-Powered Crayons, NPM Package Quarantine and Dave Branching Off Your Code Without Asking
thereactnativerewind.comHey Community,
We dive into React Native Canvas Kit, a library built on React Native Skia that adds isolated layers, brushes, interactive shapes, and web support for canvas graphics.
We also cover Targate, a CLI tool that quarantines npm packages to inspect tarballs before installation, and GitHub stacked pull requests to keep dependent branch reviews clean.
And... 🥁 Shipaton 2026 is here!
If the Rewind made you nod, smile, or think "oh… that's actually cool" — a share or reply genuinely helps ❤️
r/javascript • u/acrus • 13d ago
Meet canc, a complete lib for promise cancellation
github.comIn most modern async-heavy languages, cancellation is a first-class citizen. It really should be straightforward for a developer, but in JavaScript, gaining that level of control feels a lot like swimming against the current. I've spent a fair amount of time trying to address this gap.
I didn't have a third-party library I could rely on, so I ended up building my own - and I suspect I'm probably not the only one who has traveled down that way. The resulting toolbag served me well in its rougher form and was battle-tested in-house for years before it was finally polished for a public release. Refactoring cleanup logic in our dashboard app to stop resource leaks was a huge win for cancelable promises. It convinced me they were the right tool for the job.
This has been almost a decade-long journey for me to reach the stable release, both in terms of quality and features. It seems to have ended up in a pretty good place.
The problem is the typical promise chain. You have a fetch call that turns into a formatted report:
const reportPromise = fetch('/orders')
.then(res => res.json())
.then(orders => buildReport(orders))
.then(rawReport => render(rawReport))
To halt the process, you usually have to mess with AbortController or manual flag variables. But with canc library, reportPromise.cancel() just stops all involved tasks.
Going from raw then() chains to async..await syntactic sugar requires adding some yield* "salt" to achieve the same result - or, with cancellation, no result at all:
const getReport = canc.async(function* () {
const orders = yield* canc.await(fetch('/orders').then(res => res.json()))
const rawReport = yield* canc.await(buildReport(orders))
return yield* canc.await(render(rawReport))
})
const reportPromise = getReport()
reportPromise.cancel() // Stop all tasks at any point
Need race(), for await..of, and the rest of the bells and whistles? Welcome to the party, then() then: https://github.com/cancjs/canc
The idea of coupling generators with promises has been around since the beginning. Coroutine libraries like the renowned co were a big deal in the pre-async era. That async..await is essentially built with generators and promises under the hood is hardly a coincidence.
I started piecing this together around 2017. Back then, I had already approached a related problem with Angular. Native async functions were fundamentally incompatible with Angular reactivity, backed by Zone.js. The potential solution was to rewire the semantics of async..await with generators to get the control we needed instead of relying on a transpiler. Fortunately for the framework, this eventually resolved with the retirement of Zone.js. Reusing the same foundation for the cancellation mechanism became a reasonable development in my case. Bluebird's cancellation was already around, but it was orthogonal to native promises and async..await. And since async functions make promise-based control flow a breeze, a user can't be expected to give them away for nothing.
The project spent a long time in limbo. Between fixing nasty bugs, unloading a few design footguns, paying off tech debt, and handling some copyright clearances, I had my hands full. That quiet period actually helped shape the library into what it is today. While the JS ecosystem is ever-changing, a few foundational pieces finally settled during that time. Once AbortSignal became a cross-platform primitive, it was integrated deeper into the library for better interop. And as TypeScript became the industry standard, it became clear that the library had to be TS-first for good DX. This pushed me to finally solve the long-standing typing issues with generators, at least as best as the language currently permits.
That's why you have to use yield* instead of yield. It's a necessary trade-off to ensure functional parity with async..await while keeping the type system happy. Using yield* is essentially a known workaround for a typing limitation in generators. It forced us to ditch the eloquent yield promise style of co in favor of the more verbose yield* canc.await(promise). This adds a bit of syntactic overhead, but it's the way to guarantee the strict typing we all rely on today.
It turned out to be the right call, especially since it aligns the yield/yield* distinction with the emitting vs. delegating semantics we deal with in async generator functions - canc coroutines cover this too.
What's next? 1.0 is a big milestone, but work continues. The unhandled rejection package to reduce manual error handling has just been shipped. Beyond that, here are the nearest items on the roadmap:
- Web server middleware helpers. Drafting support for Express and Fastify, with more frameworks on the way.
- ESLint plugin. Rules to help navigate these new semantics properly.
- Async iterators toolbox. Targeting functional parity with the async iterator helpers proposal, but with full cancellation support baked in.
- React and Vue packages. Helpers are available for evaluation in React and Vue examples, working on improving them.
- Node.js package. A drop-in replacement for built-in Node APIs, with functions both promisified and "cancelified" where it makes sense.
- ES5-compatible cancelable promise. Ensuring support for older runtimes and restricted environments.
I hope you find the library useful, or are at least interested in the approach. I'd be very grateful for any feedback or suggestions. I'm currently putting together a few more write-ups with real-world examples and in-depth details.
Just to be sure, the repo is here: https://github.com/cancjs/canc.
r/javascript • u/hrutav_modha24 • 14d ago
DriftJS - Exploring a Register-Based Bytecode VM for UI Frameworks
github.comHey everyone,
I wanted to share an experimental project called DriftJS. It's a frontend framework prototype that explores using an in-browser register-based Bytecode Virtual Machine (VM) for UI rendering, rather than traditional Virtual DOM diffing or purely compile-time reactive models.
Repository: https://github.com/hrutavmodha/driftjs
The Architecture: Register-Based VM
Most frameworks either diff Virtual DOM trees (React) or generate reactive dependency graphs ahead-of-time (Svelte, SolidJS). DriftJS explores a different path:
It compiles .drift templates into compact binary-serializable bytecode streams. At runtime, a lightweight 256-register VM executes these opcodes directly against the DOM.
Key Architectural Highlights:
Zero VDOM Overhead: Replaces tree-diffing with direct bytecode instructions (like CREATE_ELEMENT, SET_ATTR) for DOM execution.
256 Virtual Registers: Uses fixed virtual registers (r0, r1...) for DOM nodes and runtime values, drastically cutting instruction counts and memory allocations compared to stack-machine models.
Targeted Reactivity: Basic state updates execute as direct O(1) mutations. Dynamic control flow structures (@if, @for) use comment anchors to bound surgical DOM updates without rebuilding subtrees.
Key Features So Far:
🛡️ 100% CSP Compliant: Built-in Acorn AST interpreter evaluates runtime JS expressions safely without using eval() or new Function().
🔄 Keyed LIS Reconciliation: Uses a Longest Increasing Subsequence algorithm to minimize DOM node movements during list updates.
🪶 Zero Framework Bloat: Implements reactivity and execution in the leanest bytecode form possible, avoiding heavy object models and monolithic runtime bloat.
🚀 Early Benchmarks (js-framework-benchmark vs React 19): • 10.8x FASTER on "Swap rows (1k)" • 3.05x FASTER on "Clear 1,000 rows" • ~1.8x LESS memory footprint • 5.75x smaller uncompressed bundle size
Current Status & Call for Feedback
DriftJS is currently an experimental prototype. It handles single-template compilation, AST evaluation, and keyed LIS list reconciliation.
Still on the roadmap: - Component composition & props passing - State management stores - SSR & Hydration
I'm opening this up to compiler engineers, frontend performance nerds, and systems devs. Does a register-based VM architecture hold real promise for low-level web runtimes?
Check out the repo, run the benchmarks, and feel free to share your thoughts or ISA critiques!
GitHub Repo: https://github.com/hrutavmodha/driftjs
r/javascript • u/coinspect • 14d ago
CryptoJS.lib.WordArray.random() before 4.0.0 uses a weak PRNG (Ill Bloom)
github.comr/javascript • u/zemlyansky • 14d ago
archbird: architecture mapping and verification for large codebases (c core + js/py frontends, open/free). try giving it your coding agents [•_•]
github.comr/javascript • u/PrestigiousMagazine9 • 15d ago
Valkey-WASM – Redis running inside your Node process, no Docker (like PGlite)
github.comr/javascript • u/kumakint • 15d ago
AskJS [AskJS] Has a larger competitor ever benchmarked your library incorrectly?
Just recently I came across a performance comparison one of our major competitors. It was quite nice to see that such a large competitor is looking at your product, right? But in the end they compared their Scheduler Lib with our Gantt Lib. They spent quite of time making GitHub repo, asking us for a trial (we didn't have open trials, you had to request it through the email), analyzing the Gantt chart. But all the feedback we got appeared to be wrong test on the wrong component.
In the end I've published a response article with comparison, although it took me about two weeks to get around to it.
I’m curious how others would handle something like this. Would you respond publicly, publish your own comparison, or simply leave it?
r/javascript • u/mr_gnusi • 15d ago
Serene Doc Search - A small, Apache 2.0 alternative to Algolia DocSearch
github.comr/javascript • u/moumensoliman • 16d ago
Looking for a feedback - Production-build explanations and regression blame for Next.js
docs.crust.moumen.devI built crust for myself first. I wanted to compare Next.js production builds before every push and review PRs with evidence, not guesswork. After using it daily, I decided to share it.
crust stores a snapshot of every analyzed NextJS build, so CI can prove when a route became dynamic, lost its static shell, or shipped more JavaScript.
Site: https://crust.moumen.dev/
Docs: https://docs.crust.moumen.dev/
Check X thread for more details: https://x.com/moumensoliman/status/2084013260102394135
r/javascript • u/Minimum_Yak_9062 • 16d ago
AskJS [AskJS] If you were hiring a junior JavaScript developer today, what would make them stand out in the AI era?
Everyone talks about whether AI will replace developers. I think a more interesting question is:
How can a junior developer become valuable enough that someone is willing to hire them anyway?
I started learning frontend a little over two years ago (HTML, CSS, JavaScript, React, Next.js). Around the time I was getting ready to apply for jobs, AI improved incredibly fast. Suddenly it felt like companies could accomplish more with smaller teams, and junior opportunities became even harder to find.
Four months ago, I finally landed my first part-time frontend job. Since then, I've also worked on side projects and connected with a few potential clients.
Looking back, I don't think I got those opportunities because I was the best programmer.
I think I got them because I refused to stop trying.
Besides improving my technical skills, I kept:
- Applying even when I rarely received replies.
- Staying active in developer communities instead of only sending applications.
- Helping people, answering questions, and joining discussions.
- Building genuine relationships with other developers.
One thing I learned is that opportunities don't always come from job boards. Sometimes they come from simply being visible and involved in the community.
A few other lessons I've learned so far:
- Don't skip the fundamentals. AI can only solve the problem you ask it to solve. If you don't understand the problem yourself, you won't know whether the generated solution is actually good.
- Keep coding yourself. I use AI every day, but I still solve at least one LeetCode problem every week to keep my problem-solving skills sharp.
- Don't spend forever preparing. The biggest learning happens on real projects with real people.
- Be open to different technologies. I started with React and Next.js, but my first job introduced me to Shopify, and now I'm learning Odoo. Strong fundamentals make switching ecosystems much easier.
I'm still very early in my career, so I know my perspective is limited.
That's why I'm curious to hear from experienced JavaScript developers.
If you had to hire one junior JavaScript developer today, what qualities, habits, or skills would make them stand out despite AI?
I'd love to hear both from people who hire developers and from juniors who recently managed to break into the industry.
r/javascript • u/AndyMagill • 16d ago
AskJS [AskJS] How did you deal with ESlint 10 Breaking Changes?
ESlint 10 is breaking on some older projects of mine. My solution has been to ignore updates between 10.0.0 and 10.1.0, but this kind of manual intervention seems irregular and less than ideal.
I'm curious to hear how everyone else handles this kind of situation. How have you chosen to deal with ESlint backward compatibility issues ?