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

Ko'proq ko'rsatish

Hindiston13 573 Texnologiyalar & Aralashmalar4 377...

📈 Telegram kanali JavaScript analitikasi

JavaScript (@javascript) Ingliz til segmentidagi kanali faol ishtirokchi. Hozirda hamjamiyat 31 441 obunachidan iborat bo'lib, Texnologiyalar & Aralashmalar toifasida 4 377-o'rinni va Hindiston mintaqasida 13 573-o'rinni egallagan.

📊 Auditoriya ko‘rsatkichlari va dinamika

невідомо sanasidan buyon loyiha tez o‘sib, 31 441 obunachiga ega bo‘ldi.

11 Iyun, 2026 dagi oxirgi ma’lumotlarga ko‘ra kanal barqaror faollikka ega. Oxirgi 30 kunda obunachilar soni -198 ga, so‘nggi 24 soatda esa 17 ga o‘zgardi va umumiy qamrov yuqori darajada qolmoqda.

Tasdiqlash holati: Tasdiqlanmagan
Jalb etish (ER): Auditoriya o‘rtacha 6.20% darajada jalb etiladi. Nashrdan keyingi dastlabki 24 soatda kontent odatda umumiy obunachilar sonining 2.53% ini tashkil etuvchi reaksiyalarni to‘playdi.
Post qamrovi: Har bir post o‘rtacha 1 949 marta ko‘riladi; birinchi sutkada odatda 797 ta ko‘rish yig‘iladi.
Reaksiyalar va o‘zaro ta’sir: Auditoriya faol: har bir postga o‘rtacha 7 ta reaksiya keladi.
Tematik yo‘nalishlar: Kontent javascript, console.log(gen.next().value, processdata, remix, acc kabi asosiy mavzularga jamlangan.

📝 Tavsif va kontent siyosati

Muallif resursni shaxsiy fikrni ifoda etish maydoni sifatida ta’riflaydi:
“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”

Yuqori yangilanish chastotasi (oxirgi ma’lumot 12 Iyun, 2026 da olingan) sababli kanal doimo dolzarb va katta qamrovli bo‘lib qoladi. Analitika auditoriya kontent bilan faol hamkorlik qilishini, uni Texnologiyalar & Aralashmalar toifasidagi muhim ta’sir nuqtasiga aylantirishini ko‘rsatadi.

31 441

Obunachilar

+1724 soatlar

-587 kunlar

-19830 kunlar

1 949

Post ko'rishlar

~ 79724 soatlar

~ 1 04548 soatlar

6.20%

Muloqot nisbati

~ 2

Kuniga postlar

Ads index

beta

Postlar arxiv

31 441

What is the output?

Anonymous voting

31 441

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);

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE


const str = "JavaScript is Awesome!";

const result = str
  .split(" ")
  .map((word, i) => {
    if (i % 2 === 0) return word.toUpperCase();
    return word.toLowerCase();
  })
  .map((word) => [...word].reverse().join(""))
  .join("-");

console.log(result);

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE


const handler = {
  get(target, prop, receiver) {
    if (prop === 'fullName') {
      return `${Reflect.get(target, 'firstName', receiver)} ${Reflect.get(target, 'lastName', receiver)}`;
    }
    return Reflect.get(target, prop, receiver);
  },
  set(target, prop, value, receiver) {
    if (typeof value !== 'string') {
      return false;
    }
    return Reflect.set(target, prop, value.trim(), receiver);
  },
  has(target, prop) {
    return prop.startsWith('_') ? false : Reflect.has(target, prop);
  }
};

const person = new Proxy({ firstName: '  Clara', lastName: 'Oswald  ', _secret: 'hidden' }, handler);
person.firstName = '  Clara';
person.lastName = '  Oswald';

console.log(person.fullName);
console.log('_secret' in person);
console.log(Reflect.ownKeys(person).length);

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE

const inventory = {
  apples: 5,
  bananas: 12,
  cherries: 0,
  dates: 8,
};

const result = Object.entries(inventory)
  .filter(([_, qty]) => qty > 0)
  .reduce((acc, [fruit, qty]) => {
    acc[fruit] = qty * 2;
    return acc;
  }, {});

const keys = Object.keys(result);
const values = Object.values(result);

console.log(keys.length, values.reduce((sum, v) => sum + v, 0));

31 441

👀 Solid v2.0.0 Beta: The <Suspense> is Over After a long experimental phase, Solid 2.0’s first beta lands with first-class async support where computations can return Promises or async iterables, and the reactive graph suspends and resumes around them natively. <Suspense> is retired in favor of <Loading> for initial renders, and mutations get a first-class action() primitive with optimistic support. For existing users the breaking changes are substantial, but there’s a migration guide. Ryan Carniato

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE

class AppError extends Error {
  constructor(message, code) {
    super(message);
    this.name = "AppError";
    this.code = code;
  }
}

function riskyOperation(value) {
  if (value === null) throw new AppError("Null value", 404);
  if (typeof value !== "number") throw new TypeError("Not a number");
  if (value < 0) throw new RangeError("Negative value");
  return value * 2;
}

const inputs = [42, null, "hello", -5];
const results = inputs.map((input) => {
  try {
    return riskyOperation(input);
  } catch (err) {
    if (err instanceof AppError) return `AppError:${err.code}`;
    if (err instanceof TypeError) return `TypeError`;
    if (err instanceof RangeError) return `RangeError`;
    return `UnknownError`;
  }
});

console.log(results);

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE


const transactions = [
  { id: 1, type: "credit", amount: 200 },
  { id: 2, type: "debit",  amount: 50  },
  { id: 3, type: "credit", amount: 150 },
  { id: 4, type: "debit",  amount: 30  },
  { id: 5, type: "credit", amount: 100 },
];

const result = transactions
  .filter(tx => tx.type === "credit")
  .map(tx => ({ ...tx, amount: tx.amount * 1.1 }))
  .reduce((acc, tx) => acc + tx.amount, 0);

console.log(result.toFixed(2));

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE

const product = {
  name: "Laptop",
  price: 1299,
  stock: 42,
  discount: 0,
  category: "Electronics",
};

const filtered = Object.entries(product)
  .filter(([key, value]) => Boolean(value))
  .reduce((acc, [key, value]) => {
    acc[key] = value;
    return acc;
  }, {});

console.log(Object.keys(filtered).length);
console.log(Object.values(filtered).includes(0));
console.log(Object.keys(filtered).join(", "));

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE

const engine = {
  type: "V8",
  displacement: 4.0,
  getInfo() {
    return `${this.type} - ${this.displacement}L`;
  },
  turbo: {
    boost: 12,
    getBoost() {
      return `${this.type ?? "Unknown"} boosted at ${this.boost} psi`;
    },
  },
};

const detached = engine.getInfo;
const turboInfo = engine.turbo.getBoost;

console.log(engine.getInfo());
console.log(engine.turbo.getBoost());
console.log(turboInfo());

31 441

😆

31 441

What is the output?

Anonymous voting

31 441

CHALLENGE

class Registry {
  static #cache = new Map();
  static #instanceCount = 0;
  static defaultTTL;

  static {
    Registry.#cache.set("base", { value: 42, active: true });
    Registry.#instanceCount = 1;
    Registry.defaultTTL = 3600;
    console.log("Static block 1:", Registry.#instanceCount, Registry.defaultTTL);
  }

  static {
    const base = Registry.#cache.get("base");
    Registry.#cache.set("derived", { value: base.value * 2, active: false });
    Registry.#instanceCount++;
    console.log("Static block 2:", Registry.#instanceCount, Registry.#cache.size);
  }

  static getSnapshot() {
    return [...Registry.#cache.entries()]
      .map(([k, v]) => `${k}:${v.value}`)
      .join(", ");
  }
}

console.log("Snapshot:", Registry.getSnapshot());
console.log("TTL:", Registry.defaultTTL);