Available now! Telegram Research 2025 โ the year's key insights 
JavaScript
Open in Telegram
A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript ๐ Don't miss our Quizzes! Let's chat: @nairihar
Show more๐ Analytical overview of Telegram channel JavaScript
Channel JavaScript (@javascript) in the English language segment is an active participant. Currently, the community unites 31 450 subscribers, ranking 4 377 in the Technologies & Applications category and 13 573 in the India region.
๐ Audience metrics and dynamics
Since its creation on ะฝะตะฒัะดะพะผะพ, the project has demonstrated rapid growth, gathering an audience of 31 450 subscribers.
According to the latest data from 11 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 17 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 6.20%. 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 1 949 views. Within the first day, a publication typically gains 797 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.
๐ Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
โA resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript ๐ Don't miss our Quizzes!
Let's chat: @nairiharโ
Thanks to the high frequency of updates (latest data received on 12 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.
31 450
Subscribers
+1724 hours
-587 days
-19830 days
Data loading in progress...
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Attracting Subscribers
June '26
June '26
+92
in 0 channels
May '26
+287
in 0 channels
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April '26
+100
in 0 channels
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March '26
+351
in 1 channels
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February '26
+837
in 0 channels
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January '26
+1 387
in 2 channels
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December '25
+239
in 5 channels
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November '25
+234
in 4 channels
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October '25
+290
in 1 channels
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September '25
+280
in 3 channels
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August '25
+345
in 1 channels
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July '25
+581
in 3 channels
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June '25
+484
in 1 channels
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May '25
+513
in 3 channels
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April '25
+464
in 4 channels
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March '25
+718
in 2 channels
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February '25
+841
in 2 channels
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January '25
+1 152
in 3 channels
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December '24
+1 547
in 1 channels
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November '24
+1 406
in 3 channels
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October '24
+1 454
in 3 channels
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September '24
+1 210
in 0 channels
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August '24
+1 506
in 2 channels
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July '24
+1 949
in 2 channels
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June '24
+1 723
in 2 channels
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May '24
+2 015
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April '24
+2 038
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March '24
+2 470
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February '24
+2 325
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January '24
+2 231
in 1 channels
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December '23
+1 792
in 0 channels
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November '23
+845
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October '23
+1 001
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September '23
+1 024
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August '23
+2 715
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| Date | Subscriber Growth | Mentions | Channels | |
| 11 June | +21 | |||
| 10 June | +2 | |||
| 09 June | +23 | |||
| 08 June | +1 | |||
| 07 June | +2 | |||
| 06 June | 0 | |||
| 05 June | +4 | |||
| 04 June | +5 | |||
| 03 June | +8 | |||
| 02 June | +10 | |||
| 01 June | +16 |
Channel Posts
๐ฎ Geometric.js: A Library for Doing Geometry
Created by someone who works on graphics for the NYT, this elegant library lets you work with polygons, bounding boxes, reflection, interpolation, rotation, and the like (examples). Does one polygon intersect with another? Thereโs a function for that.
Harry Stevens (The New York Times)
| 2 | What is the output? | 833 |
| 3 | CHALLENGE
const handler = {
get(target, prop, receiver) {
if (prop in target) {
return Reflect.get(target, prop, receiver) * 2;
}
return `missing:${prop}`;
},
set(target, prop, value) {
if (typeof value !== "number") {
throw new TypeError("Only numbers allowed");
}
Reflect.set(target, prop, value + 10);
return true;
},
has(target, prop) {
return prop.startsWith("x") ? false : prop in target;
},
};
const store = new Proxy({ xray: 5, zoom: 8 }, handler);
store.nova = 3;
console.log(store.xray);
console.log(store.nova);
console.log(store.ghost);
console.log("zoom" in store);
console.log("xray" in store); | 800 |
| 4 |  ๐ VoidZero is Joining Cloudflare
One of the yearโs big moves in JS tooling, as told by Evan himself. The company he founded to build Vite, Vitest, Rolldown, Oxc, etc. is joining Cloudflare. Heโs candid about why (monetization is hard). Good news: all projects stay MIT-licensed, and Evan and co remain in charge.
Evan You | 989 |
| 5 | What is the output? | 1 081 |
| 6 | CHALLENGE
class Registry {
static #instances = new Map();
static #count = 0;
static defaultTTL;
static maxSize;
static {
Registry.defaultTTL = 3600;
Registry.maxSize = 100;
Registry.#instances.set("__init__", { ts: 0 });
Registry.#count = Registry.#instances.size;
}
static register(key) {
if (Registry.#count >= Registry.maxSize) return false;
Registry.#instances.set(key, { ts: Registry.defaultTTL });
Registry.#count++;
return true;
}
static info() {
return `count=${Registry.#count}, ttl=${Registry.defaultTTL}, max=${Registry.maxSize}`;
}
}
Registry.register("service-a");
Registry.register("service-b");
console.log(Registry.info()); | 1 023 |
| 7 | What is the output? | 1 175 |
| 8 | CHALLENGE
const memoize = (fn) => {
const cache = new Map();
return (...args) => {
const key = JSON.stringify(args);
if (cache.has(key)) {
return cache.get(key);
}
const result = fn(...args);
cache.set(key, result);
return result;
};
};
let callCount = 0;
const expensiveMultiply = memoize((a, b) => {
callCount++;
return a * b;
});
console.log(expensiveMultiply(4, 5));
console.log(expensiveMultiply(4, 5));
console.log(expensiveMultiply(3, 7));
console.log(expensiveMultiply(4, 5));
console.log(`calls: ${callCount}`); | 1 142 |
| 9 |  ๐ช GitHub Copilot SDK Now Generally Available
Available for several platforms, including Node, this SDK lets you wield the agentic engine behind Copilot in your own apps (coupled with your own custom-built tools) and it uses an existing Copilot subscription. The getting started tutorial provides a good intro and the cookbook includes some sample apps.
GitHub | 1 187 |
| 10 | What is the output? | 1 328 |
| 11 | CHALLENGE
class Pipeline {
#value;
#log = [];
constructor(value) {
this.#value = value;
}
map(fn) {
this.#value = fn(this.#value);
this.#log.push(`map:${this.#value}`);
return this;
}
filter(fn) {
if (Array.isArray(this.#value)) {
this.#value = this.#value.filter(fn);
this.#log.push(`filter:${this.#value}`);
}
return this;
}
reduce(fn, init) {
this.#value = this.#value.reduce(fn, init);
this.#log.push(`reduce:${this.#value}`);
return this;
}
result() {
console.log(this.#log.join(' | '));
return this.#value;
}
}
const output = new Pipeline([1, 2, 3, 4, 5, 6])
.filter(x => x % 2 === 0)
.map(arr => arr.map(x => x ** 2))
.reduce((acc, x) => acc + x, 0)
.result();
console.log(output); | 1 238 |
| 12 |  ๐ฎ replacements.fyi: Find Replacements for npm Packages
Type in a package name and get suggestions of lighter alternatives or Node APIs and code snippets that do the same task. For example: is-number leads to a one-liner, axios turns into fetch, and chalk recommends util.styleText. A neat idea itโd be cool to see grow further.
e18e | 1 266 |
| 13 | What is the output? | 1 418 |
| 14 | CHALLENGE
const transactions = [
{ type: "credit", amount: 200, category: "salary" },
{ type: "debit", amount: 50, category: "food" },
{ type: "debit", amount: 30, category: "food" },
{ type: "credit", amount: 100, category: "bonus" },
{ type: "debit", amount: 70, category: "transport" },
];
const summary = transactions.reduce((acc, { type, amount, category }) => {
acc.balance += type === "credit" ? amount : -amount;
acc.byCategory[category] = (acc.byCategory[category] ?? 0) + amount;
acc.count[type] = (acc.count[type] ?? 0) + 1;
return acc;
}, { balance: 0, byCategory: {}, count: {} });
console.log(summary.balance);
console.log(JSON.stringify(summary.byCategory));
console.log(JSON.stringify(summary.count)); | 1 247 |
| 15 | What is the output? | 1 559 |
| 16 | CHALLENGE
const person = {
name: "Marcus",
greet: function () {
const inner = () => `Hello, I am ${this.name}`;
return inner();
},
greetArrow: () => {
return `Hello, I am ${this.name}`;
},
};
const detached = person.greet;
console.log(person.greet());
console.log(person.greetArrow());
console.log(detached?.()); | 1 543 |
| 17 |  Programming language legend ๐ Anders Hejlsberg was on The Pragmatic Engineer talking about his background, work on TypeScript, JavaScript's strengths and weaknesses, and how he uses AI. | 1 546 |
| 18 | What is the output? | 1 747 |
| 19 | CHALLENGE
function Animal(name) {
this.name = name;
}
Animal.prototype.speak = function () {
return `${this.name} makes a sound.`;
};
function Dog(name, breed) {
Animal.call(this, name);
this.breed = breed;
}
Dog.prototype = Object.create(Animal.prototype);
Dog.prototype.constructor = Dog;
Dog.prototype.speak = function () {
return `${this.name} barks!`;
};
const dog = new Dog("Rex", "Labrador");
console.log(dog.speak());
console.log(dog instanceof Dog);
console.log(dog instanceof Animal);
console.log(Object.getPrototypeOf(dog) === Animal.prototype); | 1 667 |
| 20 |  ๐ Plotly 3.6: The Declarative Graphing Library
A long-standing library, also widely used in the Python and R ecosystems, that offers over 50 visualization types, from basic charts and graphs to maps, plots, and heatmaps.
Plotly, Inc. | 1 558 |
