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
class EventEmitter {
#listeners = new WeakMap();
#registry = new FinalizationRegistry((label) => {
console.log(`Cleaned up: ${label}`);
});
subscribe(target, callback) {
if (!this.#listeners.has(target)) {
this.#listeners.set(target, []);
}
this.#listeners.get(target).push(callback);
this.#registry.register(target, target.name ?? "unknown");
}
emit(target) {
const cbs = this.#listeners.get(target);
if (cbs) cbs.forEach(cb => cb());
}
}
const emitter = new EventEmitter();
let obj1 = { name: "sensor" };
let obj2 = { name: "timer" };
const ws = new WeakSet([obj1, obj2]);
emitter.subscribe(obj1, () => console.log("sensor fired"));
emitter.subscribe(obj2, () => console.log("timer fired"));
emitter.subscribe(obj1, () => console.log("sensor logged"));
emitter.emit(obj1);
console.log(ws.has(obj1));
obj1 = null;
console.log(ws.has({ name: "sensor" }));31 148
🥶 Patreon has shared the tale of its seven year migration from JavaScript to TypeScript. There's a focus on tooling choices that might be useful if you're making a similar shift.
31 148
CHALLENGE
function Vehicle(make, model, year) {
this.make = make;
this.model = model;
this.year = year;
this.describe = function () {
return `${this.year} ${this.make} ${this.model}`;
};
}
Vehicle.prototype.age = function (currentYear) {
return currentYear - this.year;
};
const car = new Vehicle("Toyota", "Supra", 1998);
const bike = new Vehicle("Harley", "Sportster", 2005);
console.log(car.describe());
console.log(bike.age(2025));
console.log(car.constructor === Vehicle);
console.log(Object.getPrototypeOf(car) === Vehicle.prototype);31 148
📈 In The 49MB Web Page, Shubham Bose expresses surprise at finding that loading a single NY Times page results in 422 network requests and 49 megabytes of data transferred. He reflects on the problems that have led to this being a common experience on news sites.
31 148
CHALLENGE
const p1 = new Promise((resolve) => {
console.log("A");
resolve("B");
});
const p2 = p1.then((val) => {
console.log(val);
return "C";
});
p2.then((val) => {
console.log(val);
});
console.log("D");31 148
✌️ Temporal: The 9-Year Journey to Fix Time in JavaScript
JavaScript’s date/time handling is notoriously messy and libraries like Moment.js became popular as a way to work around it. In 2017, Maggie Johnson-Pint, a maintainer of Moment.js, proposed the Temporal API to fix date/time handling for good, and we’re mostly there (support is growing, with Safari and Node to catch up).
Jason Williams (Bloomberg)
31 148
✌️ Temporal: The 9-Year Journey to Fix Time in JavaScript
JavaScript’s date/time handling is notoriously messy and libraries like Moment.js became popular as a way to work around it. In 2017, Maggie Johnson-Pint, a maintainer of Moment.js, proposed the Temporal API to fix date/time handling for good, and we’re mostly there (support is growing, with Safari and Node to catch up).
Jason Williams (Bloomberg)
31 148
CHALLENGE
class AppError extends Error {
constructor(message, statusCode) {
super(message);
this.name = this.constructor.name;
this.statusCode = statusCode;
}
}
class ValidationError extends AppError {
constructor(message) {
super(message, 400);
this.fields = [];
}
}
function riskyOperation(value) {
if (value === null) throw new ValidationError("Null value");
if (value < 0) throw new AppError("Negative value", 422);
return value * 2;
}
const results = [];
for (const val of [10, null, -5, 3]) {
try {
results.push(riskyOperation(val));
} catch (e) {
if (e instanceof ValidationError) {
results.push(`Validation:${e.statusCode}`);
} else if (e instanceof AppError) {
results.push(`App:${e.statusCode}`);
} else {
results.push("Unknown");
}
}
}
console.log(results.join(" | "));31 148
CHALLENGE
const p1 = new Promise((resolve) => {
console.log("A");
resolve("X");
});
const p2 = p1.then((val) => {
console.log("B");
return val + "Y";
});
const p3 = p2.then((val) => {
console.log("C:", val);
});
console.log("D");31 148
CHALLENGE
"use strict";
function createCounter() {
let count = 0;
return {
increment() { count++; },
decrement() { count--; },
getCount() { return count; },
reset: () => { count = 0; }
};
}
const counter = createCounter();
counter.increment();
counter.increment();
counter.increment();
counter.decrement();
const { getCount, reset } = counter;
console.log(getCount());
reset();
console.log(counter.getCount());
31 148
CHALLENGE
const person = { name: "Carlos", scores: [10, 20, 30] };
const clone = { ...person };
clone.name = "Diana";
clone.scores.push(40);
const snapshot = Object.assign({}, person);
snapshot.name = "Elena";
snapshot.scores.push(50);
console.log(person.name);
console.log(person.scores.length);
console.log(clone.name);
console.log(clone.scores === person.scores);