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

India13 548 Technologies & Applications4 383...

📈 Analytical overview of Telegram channel JavaScript

Channel JavaScript (@javascript) in the English language segment is an active participant. Currently, the community unites 31 442 subscribers, ranking 4 383 in the Technologies & Applications category and 13 548 in the India region.

📊 Audience metrics and dynamics

Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 31 442 subscribers.

According to the latest data from 14 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -198 over the last 30 days and by -14 over the last 24 hours, overall reach remains high.

Verification status: Not verified
Engagement rate (ER): The average audience engagement rate is 6.27%. Within the first 24 hours after publication, content typically collects 2.55% reactions from the total number of subscribers.
Post reach: On average, each post receives 1 972 views. Within the first day, a publication typically gains 800 views.
Reactions and interaction: The audience actively supports content: the average number of reactions per post is 7.
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 15 June, 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.

31 442

Subscribers

-1424 hours

-527 days

-19830 days

1 972

Post views

~ 80024 hours

~ 1 05748 hours

6.27%

Engagement rate

~ 2

Posts per day

Ads index

beta

Posts Archive

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

function task1() {
  console.log('A');
  setTimeout(() => console.log('B'), 0);
  Promise.resolve().then(() => console.log('C'));
  Promise.resolve().then(() => setTimeout(() => console.log('D'), 0));
  Promise.resolve().then(() => console.log('E'));
  setTimeout(() => console.log('F'), 0);
  console.log('G');
}

task1();
// What is the order of the console output?

31 447

🌲 PSA: Beware of End-of-Life Node.js Versions Matteo Collina notes the Node.js ecosystem is “at a critical juncture”, with v18 and earlier now ‘End-of-Life’. He breaks down what that really means for users of legacy versions, and why you should skip Active LTS v20 and leap straight to v22 for maximum future-proofing. If you have to stay on older versions, though, Matteo shares an option to consider. Matteo Collina

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

const person = {
  name: 'Alice',
  greet() {
    return `Hello, I'm ${this.name}`;
  },
  farewell: () => `Goodbye from ${this.name}`
};

const greetFn = person.greet;
const farewellFn = person.farewell;

console.log(person.greet());
console.log(greetFn());
console.log(farewellFn());

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

const products = [
  { id: 1, name: 'Laptop', price: 1200, category: 'Electronics' },
  { id: 2, name: 'Headphones', price: 100, category: 'Electronics' },
  { id: 3, name: 'Book', price: 15, category: 'Books' },
  { id: 4, name: 'Shirt', price: 25, category: 'Clothing' },
  { id: 5, name: 'Coffee Mug', price: 10, category: 'Kitchen' }
];

const result = products
  .filter(p => p.price > 20)
  .map(p => ({ name: p.name, value: p.price * 0.9 }))
  .reduce((acc, item) => {
    acc.names.push(item.name);
    acc.total += item.value;
    return acc;
  }, { names: [], total: 0 });

console.log(result);

31 447

TypeScript 5.5 introduces support for new ECMAScript methods on the Set object: union, intersection, difference, and symmetricDifference. These methods allow for more intuitive and readable operations on sets.

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

function createCounter() {
  let count = 0;
  return {
    increment: () => ++count,
    getCount: () => count
  };
}

function compose(...fns) {
  return (x) => fns.reduceRight((acc, fn) => fn(acc), x);
}

const counter = createCounter();
const double = x => x * 2;
const addOne = x => x + 1;

const incrementAndProcess = compose(double, addOne, counter.increment);

counter.increment();
const result = incrementAndProcess();
console.log(result);

31 447

🌲 Monorepo: From Hate to Love When and A monorepo is like a BMW: it requires constant maintenance and attention. You can’t just set it up once and expect it to work smoothly for the next five years. nairihar

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

const user = {
  details: {
    name: 'Alex',
    contact: null,
    preferences: {
      theme: 'dark'
    }
  },
  getInfo() {
    return this?.details?.contact?.email || 
           this?.details?.preferences?.theme || 
           this?.details?.name || 
           'Unknown';
  }
};

console.log(user.getInfo());

31 447

🍊 Google Gen AI SDK for TypeScript and JavaScript v1 Why let Python developers have all the fun? Now you can harness the full power of Google’s Gemini API (and Vertex platform) from Node too. v1.0 landed a few days ago, but today we also get v1.1 which includes CommonJS support. The Gemini docs and examples now use it too (if you select JavaScript). Google

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const result = numbers
  .filter(num => num % 2 === 0)
  .map(num => num * 2)
  .reduce((acc, num, index, array) => {
    if (index === array.length - 1) {
      return (acc + num) / array.length;
    }
    return acc + num;
  }, 0);

console.log(result);

31 447

🫡 qnm: A CLI Tool to Look Into node_modules If you’ve ever been overwhelmed by what’s in node_modules, this tool lets you dig around with some guidance as to what is what. You can use fuzzy search to find specific things as well as see which modules are using the most space (you can try it right now with `npx qnm doctor`). Ran Yitzhaki

31 447

What is the output?

Anonymous voting

31 447

CHALLENGE

class EventEmitter {
  constructor() {
    this.events = {};
  }
  
  on(event, listener) {
    if (!this.events[event]) {
      this.events[event] = [];
    }
    this.events[event].push(listener);
    return () => this.off(event, listener);
  }
  
  off(event, listener) {
    if (!this.events[event]) return;
    this.events[event] = this.events[event].filter(l => l !== listener);
  }
  
  emit(event, ...args) {
    if (!this.events[event]) return false;
    this.events[event].forEach(listener => listener(...args));
    return true;
  }
}

const emitter = new EventEmitter();
const unsubscribe = emitter.on('message', data => console.log(data));
emitter.emit('message', 'Hello');
emitter.emit('message', 'World');
unsubscribe();
emitter.emit('message', 'Ignored');
console.log(emitter.emit('message', 'Still ignored'));

31 447

😭 php-node: A New Way to Bring PHP and Node Together I bet some readers have strong feelings about the idea of mixing PHP and Node.js, but this is a neat project. php-node is a native module for Node that enables the running of PHP apps within the Node environment. Why? For migrating legacy apps, building hybrid PHP/JS apps, or Node apps that simply need to call out to PHP for some reason (WordPress, maybe, as we see in this post). Matteo Collina et al.