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 31 443 subscribers, ranking 4 384 in the Technologies & Applications category and 13 551 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 31 443 subscribers.
According to the latest data from 13 June, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -193 over the last 30 days and by 21 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 2.53% 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 796 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 14 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.
const str = 'JavaScript';
const result1 = str.slice(-6, -2);
const result2 = str.substring(-6, -2);
const result3 = str.substr(-6, 4);
const combined = [result1, result2, result3];
const final = combined.map(s => s || 'empty').join(' | ');
console.log(final);function highlight(strings, ...values) {
return strings.reduce((result, string, i) => {
const value = values[i] ? `<mark>${values[i]}</mark>` : '';
return result + string + value;
}, '');
}
const name = 'Sarah';
const skill = 'React';
const template = highlight`Hello ${name}, you're great at ${skill}!`;
console.log(template);const target = { name: 'Sarah', age: 25 };
const handler = {
get(obj, prop) {
if (prop in obj) {
return obj[prop].toString().toUpperCase();
}
return `Property ${prop} not found`;
},
set(obj, prop, value) {
obj[prop] = value * 2;
return true;
}
};
const proxy = new Proxy(target, handler);
proxy.salary = 50000;
console.log(proxy.name);
console.log(proxy.age);
console.log(proxy.salary);
console.log(proxy.city);
class DataProcessor {
constructor(transform) {
this.transform = transform;
}
process(data) {
return this.transform(data);
}
}
const multiply = x => x * 2;
const addTen = x => x + 10;
const toString = x => `Result: ${x}`;
const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x);
const processor = new DataProcessor(compose(toString, addTen, multiply));
console.log(processor.process(5));async function fetchData() {
return Promise.resolve('data');
}
async function processData() {
const result = await fetchData();
console.log('Processing:', result);
return result.toUpperCase();
}
const promise = processData();
console.log('Promise:', promise);
promise.then(value => {
console.log('Final:', value);
});
class EventManager {
constructor() {
this.listeners = new Map();
}
addListener(event, callback) {
if (!this.listeners.has(event)) {
this.listeners.set(event, new Set());
}
this.listeners.get(event).add(callback);
}
removeAllListeners() {
this.listeners.clear();
}
}
const manager = new EventManager();
const obj = { data: new Array(1000).fill('memory') };
manager.addListener('test', () => obj.data.length);
manager.removeAllListeners();
console.log(manager.listeners.size);const Maybe = {
of: (value) => ({ value, map: f => value == null ? Maybe.nothing() : Maybe.of(f(value)) }),
nothing: () => ({ value: null, map: () => Maybe.nothing() })
};
const result = Maybe.of(5)
.map(x => x * 2)
.map(x => x > 15 ? null : x)
.map(x => x + 1)
.map(x => x.toString());
console.log(result.value);
function Vehicle(type) {
this.type = type;
}
Vehicle.prototype.describe = function() {
return `This is a ${this.type}`;
};
function Car(brand) {
Vehicle.call(this, 'car');
this.brand = brand;
}
Car.prototype = Object.create(Vehicle.prototype);
Car.prototype.constructor = Car;
Car.prototype.describe = function() {
return Vehicle.prototype.describe.call(this) + ` made by ${this.brand}`;
};
const tesla = new Car('Tesla');
console.log(tesla.describe());
console.log(tesla.constructor.name);