Available now! Telegram Research 2025 β the year's key insights 
JavaScript
A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript π Don't miss our Quizzes! Let's chat: @nairihar
Show moreπ 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.
π Audience metrics and dynamics
Since its creation on Π½Π΅Π²ΡΠ΄ΠΎΠΌΠΎ, 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.
π Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
βA resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript π Don't miss our Quizzes!
Let's chat: @nairiharβ
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.
function Vehicle(wheels) {
this.wheels = wheels;
}
Vehicle.prototype.getWheels = function() {
return this.wheels;
};
function Car() {
Vehicle.call(this, 4);
this.doors = 4;
}
Car.prototype = Object.create(Vehicle.prototype);
Car.prototype.constructor = Car;
const myCar = new Car();
console.log(myCar.getWheels(), myCar instanceof Vehicle);
const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x);
const addTwo = num => num + 2;
const multiplyByThree = num => num * 3;
const subtractTen = num => num - 10;
const calculate = compose(subtractTen, multiplyByThree, addTwo);
console.log(calculate(5));
function mystery() {
try {
console.log('A');
throw new Error('Oops');
console.log('B');
} catch (err) {
console.log('C');
return 'D';
} finally {
console.log('E');
return 'F';
}
console.log('G');
return 'H';
}
console.log(mystery());
const users = [
{ id: 1, name: 'Sarah' },
{ id: 2, name: 'Miguel' },
{ id: 3, name: 'Jordan' }
];
const activeUsers = new WeakSet();
activeUsers.add(users[0]);
activeUsers.add(users[2]);
users.splice(1, 1); // Remove Miguel
let count = 0;
for (const user of users) {
if (activeUsers.has(user)) count++;
}
console.log(count);
function createCounter() {
let count = 0;
return {
increment() {
return ++count;
},
reset() {
const oldCount = count;
count = 0;
return oldCount;
}
};
}
const counterA = createCounter();
const counterB = createCounter();
counterA.increment();
counterA.increment();
counterB.increment();
const result = counterA.reset() + counterB.reset();
console.log(result);const memoryLeak = () => {
const cache = new Map();
const weakCache = new WeakMap();
const objKey = { id: 123 };
const data = { name: 'User data', value: 42 };
cache.set(objKey, data);
weakCache.set(objKey, data);
// Simulate removing reference to key
const result = { map: cache.has(objKey), weakMap: weakCache.has(objKey) };
// objKey = null; // This would be an error, as const can't be reassigned
return result;
};
console.log(memoryLeak());
function createCounter() {
let count = 0;
function increment() {
count += 1;
return count;
}
function decrement() {
count -= 1;
return count;
}
return { increment, decrement, value: () => count };
}
const counter = createCounter();
counter.increment();
counter.increment();
counter.decrement();
console.log(counter.value() + counter.increment());