JavaScript's New Superpower: Explicit Resource Management

Odyc.js – A tiny JavaScript library for narrative games

Show HN: SQLite JavaScript - extend your database with JavaScript

A thought on JavaScript "proof of work" anti-scraper systems

After 25 years of writing software, I was feeling nostalgic for the kinds of things that got me into programming in the first place: the old DOS demoscene. I spent a weekend seeing if I could recapture some of that INT 13H VGA magic using today&#x27;s web tech, but with the old-school constraints of doing it from scratch.The result is this portfolio of ten classic effects running in a single HTML file. It&#x27;s all vanilla JavaScript writing to a &lt;canvas&gt; element, with no external libraries. It was a fun challenge to implement things like:* The color palette cycling and smooth fading in the Plasma demo.
* The buffer-averaging algorithm for the Fire effect to make the flames feel more natural.
* The distance-based texture crossfading in the Tunnel to create the illusion of flying through different sections.
* A 2D scalar field for the Metaballs to calculate the surface normals for that classic blended, metallic look (I did the best I could with the given constraints).It was a great exercise in getting back to first principles and a reminder of how much those early demo programmers could accomplish with so little. I hope it brings back some good memories for others who grew up with this stuff.I&#x27;d love to hear about your favorite classic demos or if there are any other iconic effects you think would be a fun challenge to add.Cheers!

Show HN: I recreated 90s Mode X demoscene effects in JavaScript and Canvas

Nova: A JavaScript and WebAssembly engine written in Rust

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WebMonkeys: parallel GPU programming in JavaScript (2016)

Show HN: Moon Phase Algorithms for C, Lua, Awk, JavaScript, etc.

Polycompiler: Merge Python and JavaScript code into one file that runs in both

Migrating a JavaScript Project from Prettier and ESLint to BiomeJS

Is It JavaScript?

Hello HN,I built a Typescript library (named socket-call, for lack of a more sexy name) whose goal is to be able to call socket.io events as regular functions.So you declare your server-side like so:<pre><code> ...
 const listenEvents = (services: UserServices) =&gt; ({
 &#x2F;&#x2F; Add your events here, the name of the event is the name of the function
 login: async (username: string) =&gt; {
 services._socket.data.user = { username };
 console.log(`User ${username} logged in`);
 setInterval(() =&gt; {
 &#x2F;&#x2F; Calling an event that&#x27;s handled client-side
 services.showServerMessage(`You&#x27;re still logged in ${username}!`)
 }, 1000);
 return `You are now logged in ${username}!`;
 },
 });
</code></pre>
and then on the client side you call them like normal async Javascript functions (and you can also create client-side event handlers):<pre><code> ...
 const user = socket.addNamespace&lt;UserEmitEvents, UserListenEvents&gt;(
 &#x27;&#x2F;user&#x27;
 );
 
 &#x2F;&#x2F; Calling an event that&#x27;s declared server-side
 user.login(username.value).then((message) =&gt; {
 console.log(&#x27;Server acked with&#x27;, message);
 });
 
 &#x2F;&#x2F; Handling an event that is sent by the server
 user.showServerMessage = (message) =&gt; {
 console.log(&#x27;Server sent us the message&#x27;, message);
 }

</code></pre>
I use this library for my own projects and would be interested to receive feedback about it :-)

Show HN: Socket-call – Call socket.io events like normal JavaScript functions

Hi HN!Run it: OPENROUTER_API_KEY=&quot;sk&quot; npx bff-eval --demoWe built a tool to help people take LLM outputs and easily grade them &#x2F; eval them to know how good an assistant response is.We&#x27;ve built a number of LLM apps, and while we could ship decent tech demos, we were disappointed with how they&#x27;d perform over time. We worked with a few companies who had the same problem, and found out scientifically building prompts and evals is far from a solved problem... writing these things feels more like directing a play than coding.Inspired by Anthropic&#x27;s constitutional ai concepts, and amazing software like DSPy, we&#x27;re setting out to make fine tuning prompts, not models, the default approach to improving quality using actual metrics and structured debugging techniques.Our approach is pretty simple: you feed it a JSONL file with inputs and outputs, pick the models you want to test against (via OpenRouter), and then use an LLM-as-grader file in JS that figures out how well your outputs match the original queries.If you&#x27;re starting from scratch, we&#x27;ve found TDD is a great approach to prompt creation... start by asking an LLM to generate synthetic data, then you be the first judge creating scores, then create a grader and continue to refine it till its scores match your ground truth scores.If you’re building LLM apps and care about reliability, I hope this will be useful! Would love any feedback. The team and I are lurking here all day and happy to chat. Or hit me up directly on Whatsapp: +1 (646) 670-1291We have a lot bigger plans long-term, but we wanted to start with this simple (and hopefully useful!) tool.Run it: OPENROUTER_API_KEY=&quot;sk&quot; npx bff-eval --demo

Show HN: Create LLM graders and run evals in JavaScript with one file

If you're building a JavaScript library and need logging, you would love LogTape

Bluefishjs: A diagram drawing framework for JavaScript

Streaming HTML out of order without JavaScript

Sprig is a tile based game engine made by Hack Club that&#x27;s like Scratch&#x27;s older brother but has it&#x27;s own set of unique limitations.All sprites need to be made in Bitmap and uses a midi like event sequencer to get any music into it, since it&#x27;s meant for a different set of hardware, you can only use very basic controls too.I made a version of PacMan inside it that has randomly generated mazes every time and mostly works well!

Show HN: Sprigman – Pac-Man Recreated in a Limited Tile Based JavaScript Engine

This month in Servo: color inputs, SVG, embedder JavaScript, and more

JavaScript powers the web - it's **the** most important programming language you need to know as a web developer.

## Exempel 1

For example, We have an array of different objects that can weigh the same or different and are spaced apart from us.
The customer wants the lightest and closest object.

```js
object.sort((a,b)=>a.weigh - b.weigh)

 const lightest=(object[0].weigh);
 let sortDistance=(object[0].distance); 

 for (let i = 0; i< object.length; i++) { 
 if (lightest === object[i].weigh && sortDistance > object[i].distance){
 sortDistance = object[i].distance;
 sortObject.unshift(object[i]);
 }else{
 sortObject.push(object[i]);
 }
 }
```

... more comming soon

Mastering JavaScript

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