JavaScript

23 July 2024 08:31

CHALLENGE

const obj = {
  a: 1,
  then(resolve) {
    resolve(this.a);
  }
};

obj.then(console.log);

JavaScript

22 July 2024 08:31

CHALLENGE

const array = [1, 2, 3];
array[-1] = 0;

console.log(array.length);

JavaScript

21 July 2024 08:31

CHALLENGE

const obj1 = { a: 1 };
const obj2 = Object.create(obj1);
obj2.b = 2;

const result = 'a' in obj2;

console.log(result);

JavaScript

20 July 2024 08:31

CHALLENGE

const array = Array.from({ length: 5 }, () => Math.random() > 0.5);

console.log(array);

JavaScript

19 July 2024 11:07

🥲 hubs.la/Q02HbH-80

JavaScript

17 July 2024 21:25

🌲 What is new in Node.js V22.5

In this article, we will review the notable changes introduced in the new Node.js version:

- node:sqlite module
- add matchesGlob method
- add postessageToThread method

nairihar

JavaScript

17 July 2024 08:31

CHALLENGE

function Foo() {
  this.bar = 1;
}

Foo.prototype.bar = 2;

const foo = new Foo();
console.log(foo.bar);

JavaScript

16 July 2024 08:31

CHALLENGE

const obj = { a: 1, b: 2 };
const obj2 = { ...obj, b: 3 };

const samePrototype = Object.getPrototypeOf(obj) === Object.getPrototypeOf(obj2);

console.log(samePrototype);

JavaScript

15 July 2024 08:31

CHALLENGE

const arr = [1, 2, 3, 4, 5];
const sliced = arr.slice(1, 3);
const spliced = arr.splice(1, 3);

console.log(sliced, spliced, arr);

JavaScript

14 July 2024 08:31

CHALLENGE

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

obj1.b.c = 3;

console.log(obj2.b.c);

JavaScript

13 July 2024 08:31

CHALLENGE

const array = [1, 2, 3, 4, 5];
const result = array.some(n => n % 2 === 0) && array.every(n => n < 10);

console.log(result);

JavaScript

12 July 2024 08:31

CHALLENGE

const obj = {
  a: 1,
  b() {
    return this.a;
  }
};

const b = obj.b;
console.log(b.call({ a: 2 }));

JavaScript

11 July 2024 08:32

CHALLENGE

const array = [1, 2, 3];
array[10] = 4;

console.log(array.length);
console.log(array.includes(undefined));

JavaScript

10 July 2024 08:31

CHALLENGE

const obj = { a: 1, b: 2 };
const proxy = new Proxy(obj, {
  get(target, prop) {
    return prop in target ? target[prop] : 0;
  }
});

console.log(proxy.a, proxy.b, proxy.c);

JavaScript

09 July 2024 08:31

CHALLENGE

const array = [1, 2, 3, 4, 5];
const [first, ...rest] = array;

const modified = rest.map((n, i) => i % 2 === 0 ? n * 2 : n);

console.log(first, modified);

JavaScript

22 July 2024 15:37

👩‍🦯 es-toolkit: A Modern JavaScript Utility Library

Think Lodash but newer, faster, smaller, and with tree shaking and built-in TypeScript support. The reference guide shows off the supported functions so far – it’s not quite as extensive as Lodash, but it’s getting there with the goal being “to achieve full feature parity with Lodash.”

Viva Republica, Inc

JavaScript

21 July 2024 15:07

🌕 How to Make Complex Chrome Extensions

Spinning up a quick, simple browser extension isn’t that big of a deal nowadays, especially with tools like Extension to kick off a project. Larger extensions are a different story, so it’s neat to learn from the experiences of a team that’s built one.

Nina Torgunakova

JavaScript

20 July 2024 15:37

🔵 React Flow 12: Create Node-Based Editors & Interactive Diagrams

Part of xyflow, this makes it easy to create node-based UIs where you have interactive components wired together however you choose. There's a Svelte version too.

Moritz Klack and John Robb

JavaScript

19 July 2024 15:08

✌️ JavaScript weekly #697

JavaScript

19 July 2024 08:31

CHALLENGE

const func = () => arguments.length;
console.log(func(1, 2, 3));

JavaScript

17 July 2024 15:34

🌲 Check the latest updates of Nairi's long article about EventLoop

— Unblocking EventLoop using unref() (added in Jul of 2024)

— A challenging interview question (added in Feb of 2024)

nairihar

JavaScript

16 July 2024 15:22

🤩 BWIP-JS: A Barcode Writer in Pure JavaScript

A library that can generate barcodes using over 100 different barcode types and standards, both single and two dimensional. There is, of course, a live demo where you, too, can discover far more types of barcodes exist than you ever imagined.

Mark Warren

JavaScript

15 July 2024 15:33

⚡️ Dynamically loaded extensions in Postgres in the browser

At a recent AGI House hackathon in San Francisco, we set out to run our Postgres vector extension directly in the browser. This would allow our documentation examples and small demos to be fully executable within the browser using a Postgres instance compiled to Wasm and running on the client browser.

lantern

JavaScript

14 July 2024 15:28

😆

JavaScript

13 July 2024 15:44

👀 Top Programming Language to Learn in 2024

hovdallakyan">@hovdallakyan

JavaScript

12 July 2024 15:32

✌️ JavaScript weekly #​696

JavaScript

11 July 2024 15:22

📊 Sliderland: A Minimalist Coding Playground

A slider control based visualization you can code with simple formulas. We last linked to this a few years ago, but it’s still a fun way to do some quick, visual JS math experimentation. Tixy.land is along similar lines, but based on a 2D grid.

blinry

JavaScript

10 July 2024 15:19

✌️ How to Annul Promises in JavaScript

You can 'cancel' XHR and fetch requests, but can you cancel regular promises? Currently, no, but Zachary looks into doing the next best thing: telling a promise the game's up, and discarding/ignoring its eventual results.

Zachary Lee

JavaScript

09 July 2024 16:23

😂

JavaScript

08 July 2024 16:27

😆