JavaScript
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A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript 🚀 Don't miss our Quizzes! Let's chat: @nairihar
Show more📈 Analytical overview of Telegram channel JavaScript
Channel JavaScript (@javascript) in the English language segment is an active participant. Currently, the community unites 31 148 subscribers, ranking 4 163 in the Technologies & Applications category and 12 815 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 31 148 subscribers.
According to the latest data from 19 September, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -123 over the last 30 days and by -2 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 6.26%. Within the first 24 hours after publication, content typically collects 2.31% reactions from the total number of subscribers.
- Post reach: On average, each post receives 1 949 views. Within the first day, a publication typically gains 718 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 5.
- Thematic interests: Content is focused on key topics such as javascript, console.log(gen.next().value, processdata, remix, acc.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript 🚀 Don't miss our Quizzes!
Let's chat: @nairihar”
Thanks to the high frequency of updates (latest data received on 20 September, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
31 148
Subscribers
-224 hours
-367 days
-12330 days
Posts Archive
31 148
CHALLENGE
const name = "Zara";
const age = 28;
const role = "engineer";
const user = { name, age, role };
const { name: fullName, age: years, role: position = "developer" } = user;
const greet = ({ name, age }) => `${name} is ${age}`;
const team = [
{ name: "Zara", age: 28 },
{ name: "Leo", age: 34 },
];
const [{ name: first }, { age: secondAge }] = team;
console.log(`${fullName}, ${years}, ${position} | ${first}, ${secondAge}`);31 148
🤟 Node.js EventLoop Lag + Kafka Consumer Lag: One Root Cause
The 3-Second Production Mystery That Took Me 20 Days to Solve
This is a story about how we found a 3s EventLoop lag (p99) in one of our microservices while exploring the Kafka consumer lag… and how I tracked it down and fixed.
It’s Feb 6. I notice an increase in Kafka lag in our Grafana chart...
nairihar
31 148
😮 numpy-ts: A NumPy Implementation for TypeScript
NumPy is a fundamental piece of the Python scientific computing ecosystem and well-entrenched in many use cases. JavaScript has some options in this regard (e.g. TensorFlow.js), but numpy-ts is an attempt to replace the NumPy experience as closely as possible (currently at 94% API coverage). There’s an online playground if you want to give it a quick spin.
Nicolas Dupont
31 148
CHALLENGE
let x = 'global';
function testScope() {
console.log(x);
if (true) {
let x = 'block';
var y = 'function';
console.log(x);
}
console.log(x);
console.log(y);
}
testScope();31 148
👀 AdonisJS v7 Released: 'Batteries-Included' Node.js Framework
A popular webapp framework that includes auth, ORM, queues, testing, etc. in a cohesive fashion. With v7 comes an all new web site, modernizations, OpenTelemetry integration, new starter kits to rapidly build new apps, barrel file generation, and end-to-end type safety.
Harminder Virk
31 148
CHALLENGE
const user = {
profile: {
getName: () => "Marcus",
getAge: () => 30,
},
settings: null,
};
const name = user.profile?.getName?.();
const age = user.profile?.getAge?.();
const theme = user.settings?.getTheme?.() ?? "dark";
const lang = user.address?.getLocale?.() ?? "en-US";
console.log(`${name} | ${age} | ${theme} | ${lang}`);31 148
🫶 Play with a complete Windows 3.11 environment in your browser. A lot of fun! There's a recreation of 90s search engine Altavista (above), a version of mIRC that connects to an actual IRC server, and a variety of classic games.
31 148
CHALLENGE
const inventory = {
apples: 5,
bananas: 0,
cherries: 12,
dates: undefined,
elderberries: null,
};
const summary = Object.entries(inventory)
.filter(([_, value]) => value)
.reduce((acc, [key, value]) => {
acc[key] = value * 2;
return acc;
}, {});
console.log(Object.keys(summary).length);
console.log(Object.values(summary).every(v => v > 10));
console.log(Object.keys(inventory).length === Object.keys(summary).length);31 148
⚡️ Beautiful Mermaid 1.0
Render Mermaid diagram markup to SVG or ASCII/Unicode outputs (above) from JavaScript.
31 148
CHALLENGE
class Session {
#id;
constructor(id) {
this.#id = id;
}
getId() { return this.#id; }
}
const activeSessions = new WeakSet();
const s1 = new Session("user_42");
const s2 = new Session("user_99");
let s3 = new Session("user_07");
activeSessions.add(s1);
activeSessions.add(s2);
activeSessions.add(s3);
console.log(activeSessions.has(s1)); // line A
console.log(activeSessions.has(s3)); // line B
s3 = null;
console.log(activeSessions.has(s3)); // line C
activeSessions.delete(s2);
console.log(activeSessions.has(s2)); // line D
console.log(activeSessions.size); // line E31 148
😃 OpenSeadragon 6.0: A Web Viewer for High Resolution Images
A big step forward for a project that’s almost 15 years old, and one of few stable, trusty options for rendering ultra-high resolution images for users to zoom into and pan around. Version 6 introduces a new async and cache-managed pipeline, making it far more efficient at scale.
OpenSeadragon Contributors
31 148
CHALLENGE
const compose = (...fns) => (x) => fns.reduceRight((acc, fn) => fn(acc), x);
const pipe = (...fns) => (x) => fns.reduce((acc, fn) => fn(acc), x);
const double = (x) => x * 2;
const addTen = (x) => x + 10;
const square = (x) => x * x;
const negate = (x) => -x;
const transform1 = compose(negate, square, addTen, double);
const transform2 = pipe(double, addTen, square, negate);
const input = 3;
console.log(transform1(input));
console.log(transform2(input));
console.log(transform1(input) === transform2(input));31 148
👀 The Fastest Frontend Tooling for Humans and AI
Christoph (of Jest fame) covers his preferred tools for getting your JavaScript tool stack running as fast as possible. It’s also intended for LLMs to process via this Markdown version.
Christoph Nakazawa
