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 31 439 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 31 439 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.
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 age = 25;
const template = highlight`Hello ${name}, you are ${age} years old!`;
console.log(template);
const empty = highlight`No interpolation here`;
console.log(empty);
function processData() {
try {
console.log('start');
throw new Error('oops');
console.log('after throw');
} catch (e) {
console.log('catch');
return 'caught';
} finally {
console.log('finally');
}
console.log('end');
}
const result = processData();
console.log(result);
const obj = {
name: 'Sarah',
getName() { return this.name; },
getNameArrow: () => this.name
};
const { getName, getNameArrow } = obj;
const boundGetName = obj.getName.bind(obj);
console.log(getName());
console.log(getNameArrow());
console.log(boundGetName());
console.log(obj.getName());
console.log(obj.getNameArrow());
const userInput = "<script>alert('xss')</script>";
const sanitized = userInput.replace(/<script[^>]*>.*?<\/script>/gi, '');
const users = new Map();
users.set('admin', { password: 'secret123', role: 'admin' });
users.set('guest', { password: 'guest', role: 'user' });
function authenticate(username, password) {
const user = users.get(username);
return user && user.password === password ? user.role : null;
}
const role1 = authenticate('admin', 'secret123');
const role2 = authenticate('guest', 'wrong');
const role3 = authenticate('hacker', 'secret123');
console.log(sanitized);
console.log(role1, role2, role3);class StateMachine {
constructor() {
this.state = 'idle';
this.transitions = {
idle: { start: 'running' },
running: { pause: 'paused', stop: 'idle' },
paused: { resume: 'running', stop: 'idle' }
};
}
transition(action) {
const validTransitions = this.transitions[this.state];
if (validTransitions && validTransitions[action]) {
this.state = validTransitions[action];
return true;
}
return false;
}
}
const machine = new StateMachine();
console.log(machine.transition('pause'));
console.log(machine.state);
console.log(machine.transition('start'));
console.log(machine.state);const obj = { a: 1, b: { c: 2 } };
const frozen = Object.freeze(obj);
frozen.a = 99;
frozen.b.c = 88;
frozen.d = 77;
const sealed = Object.seal({ x: 10, y: 20 });
sealed.x = 30;
sealed.z = 40;
delete sealed.y;
console.log(obj.a, obj.b.c, obj.d);
console.log(sealed.x, sealed.y, sealed.z);
const arr = new Array(1000000).fill(0).map((_, i) => i);
const results = [];
function method1() {
return arr.filter(x => x % 2 === 0).map(x => x * 2).slice(0, 3);
}
function method2() {
const result = [];
for (let i = 0; i < arr.length && result.length < 3; i++) {
if (arr[i] % 2 === 0) {
result.push(arr[i] * 2);
}
}
return result;
}
console.log(method1().join(','));
console.log(method2().join(','));
