es
Feedback
JavaScript

JavaScript

Ir al canal en Telegram

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

Mostrar más

📈 Análisis del canal de Telegram JavaScript

El canal JavaScript (@javascript) en el segmento lingüístico de Inglés es un actor destacado. Actualmente la comunidad reúne a 31 148 suscriptores, ocupando la posición 4 163 en la categoría Tecnologías y Aplicaciones y el puesto 12 815 en la región India.

📊 Métricas de audiencia y dinámica

Desde su creación el невідомо, el proyecto ha mostrado un crecimiento acelerado, reuniendo a 31 148 suscriptores.

Según los últimos datos del 19 septiembre, 2026, el canal mantiene una actividad estable. En los últimos 30 días la variación de miembros fue de -123, y en las últimas 24 horas de -2, conservando un alto alcance.

  • Estado de verificación: No verificado
  • Tasa de interacción (ER): El promedio de interacción de la audiencia es 6.26%. Durante las primeras 24 horas tras publicar, el contenido suele obtener 2.31% de reacciones respecto al total de suscriptores.
  • Alcance de las publicaciones: Cada publicación recibe en promedio 1 949 visualizaciones. En el primer día suele acumular 718 visualizaciones.
  • Reacciones e interacción: La audiencia responde de forma activa: el promedio de reacciones por publicación es 5.
  • Intereses temáticos: El contenido se centra en temas clave como javascript, console.log(gen.next().value, processdata, remix, acc.

📝 Descripción y política de contenido

El autor describe el recurso como un espacio para expresar opiniones subjetivas:
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

Gracias a la alta frecuencia de actualizaciones (últimos datos recibidos el 20 septiembre, 2026), el canal mantiene la vigencia y un amplio alcance. La analítica demuestra que la audiencia interactúa activamente con el contenido, lo que lo convierte en un punto de referencia dentro de la categoría Tecnologías y Aplicaciones.

31 148
Suscriptores
-224 horas
-367 días
-12330 días
Archivo de publicaciones
What is the output?
Anonymous voting

CHALLENGE
const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { ...obj1 };
const obj3 = obj1;

obj2.a = 10;
obj2.b.c = 20;
obj3.b.c = 30;

console.log(obj1.a);
console.log(obj1.b.c);
console.log(obj2.a);
console.log(obj2.b.c);
console.log(obj3.a);
console.log(obj3.b.c);

👀 Introducing LibPDF: PDF Parsing and Generation from TypeScript LibPDF bills itself as ‘the PDF library TypeScript deserves
👀 Introducing LibPDF: PDF Parsing and Generation from TypeScript LibPDF bills itself as ‘the PDF library TypeScript deserves’ and supports parsing, modifying, signing and generating PDFs with a modern API in Node, Bun, and the browser. GitHub repo. Documenso

What is the output?
Anonymous voting

CHALLENGE
class DataProcessor {
  static #cache = new Map();
  static #initialized = false;
  
  static {
    console.log('First block');
    this.#cache.set('default', 'value1');
  }
  
  static {
    console.log('Second block');
    this.#cache.set('config', 'value2');
    this.#initialized = true;
  }
  
  static getStatus() {
    return `${this.#cache.size}-${this.#initialized}`;
  }
}

console.log(DataProcessor.getStatus());

CHALLENGE
const numbers = [1, 2, 3, 4, 5, 6];

const result = numbers
  .filter(n => n % 2 === 0)
  .map(n => n * n)
  .reduce((acc, val) => {
    console.log(`Processing: ${val}, Accumulator: ${acc}`);
    return acc + val;
  }, 0);

console.log(`Final result: ${result}`);

🌪 GitHub is exploring solutions to tackle low-quality contributions, which could include giving you the option to disable PR
🌪 GitHub is exploring solutions to tackle low-quality contributions, which could include giving you the option to disable PRs entirely or at least restrict them to collaborators. Got opinions? Join the discussion.

What is the output?
Anonymous voting

CHALLENGE
const target = { name: "Sarah", age: 25 };

const handler = {
  get(obj, prop) {
    if (prop === 'greeting') {
      return `Hello, I'm ${obj.name}`;
    }
    return obj[prop]?.toString().toUpperCase() || 'UNKNOWN';
  },
  
  set(obj, prop, value) {
    if (typeof value === 'string') {
      obj[prop] = value.toLowerCase();
    } else {
      obj[prop] = value * 2;
    }
    return true;
  }
};

const proxy = new Proxy(target, handler);
console.log(proxy.name);
proxy.city = "Boston";
proxy.score = 15;
console.log(proxy.greeting);
console.log(proxy.city + " " + proxy.score);

👀 Heat.js 5.0: A Flexible Heat Map Rendering Solution Generate customized interactive heatmaps (think GitHub contributions g
👀 Heat.js 5.0: A Flexible Heat Map Rendering Solution Generate customized interactive heatmaps (think GitHub contributions graph), or render heatmaps as lines and bar charts. The site is packed with demos to enjoy. GitHub repo. William Troup

What is the output?
Anonymous voting

CHALLENGE
let counter = 0;

const increment = () => ++counter;
const getValue = () => counter;

const obj = {
  get value() { 
    increment();
    return getValue();
  }
};

console.log(obj.value);
console.log(obj.value);
console.log(counter);

⁉️ How Not to Parse Numbers in JavaScript Why use a proper locale-aware API to parse numbers when you can hand-roll a maze of
⁉️ How Not to Parse Numbers in JavaScript Why use a proper locale-aware API to parse numbers when you can hand-roll a maze of string splits, separator swaps, and implicit type coercions that silently break on edge cases? Remy Porter (The Daily WTF)

What is the output?
Anonymous voting

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;
  };
};

const fibonacci = memoize((n) => {
  if (n <= 1) return n;
  return fibonacci(n - 1) + fibonacci(n - 2);
});

console.log(fibonacci(10));
console.log(fibonacci(5));
console.log(fibonacci(10));

✌️ Four Heavyweights Drop Updates Four stalwarts of the JavaScript ecosystem all shipped notable releases this week, and odds
✌️ Four Heavyweights Drop Updates Four stalwarts of the JavaScript ecosystem all shipped notable releases this week, and odds are you're using at least one of them: • Gatsby v5.16 proves Gatsby, once considered neck-and-neck with Next.js in the React world, is not 'dead'. The headline feature is React 19 support. • Babel 7 just shipped its final release. "After years in the making, Babel 8 is finally ready," in release candidate form, at least. • Rspress 2.0 is a major release for the high-performance Rust-powered, but JavaScript-facing, static site generator. • Lodash 4.17.23 sounds minor, but it's a 'security reset' for the still heavily used utility library and is designed to provide a base for a longer future.

What is the output?
Anonymous voting

CHALLENGE
const source = { a: 1, b: { c: 2 } };
const target1 = Object.assign({}, source);
const target2 = { ...source };

source.b.c = 99;
target1.a = 10;
target2.b.c = 50;

console.log(source.a);
console.log(source.b.c);
console.log(target1.a);
console.log(target1.b.c);
console.log(target2.a);
console.log(target2.b.c);

What is the output?
Anonymous voting

CHALLENGE
const obj = {
  name: 'Sarah',
  greet() {
    console.log(`Hello, ${this.name}`);
  }
};

const person = { name: 'Mike' };
const func = obj.greet;

obj.greet();
func();
func.call(person);
person.hello = obj.greet;
person.hello();