JavaScript

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😆 My code after the refactoring

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❓ CHALLENGE

let obj1 = { key: 'value1' };
let obj2 = { key: 'value2' };

const weakMap = new WeakMap();
weakMap.set(obj1, 'data1');
weakMap.set(obj2, 'data2');

obj1 = null;
setTimeout(() => {
  console.log(weakMap.has(obj1));
  console.log(weakMap.has(obj2));
}, 100);

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🥶 A Different Way to Think About TypeScript

“a very expressive way to operate over sets, and using those sets to enforce strict compile time checks”

Robby Pruzan

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❓CHALLENGE

const target = {
  age: 30
};

const handler = {
  get: function(obj, prop) {
    return obj[prop]++;  
  }
};

const proxy = new Proxy(target, handler);

console.log(proxy.age);
console.log(target.age);
console.log(proxy.age);

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🥹😂😆emoji-picker-element: A Lightweight Emoji Picker

An emoji picking control, packaged as a Web Component. You can also add custom emoji to it. GitHub repo.

Nolan Lawson

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Vector database on top of Postgres for AI

❓CHALLENGE

let count = 0;

const counter = (function() {
  count = 0;
  return function() {
    count += 1;
    return count;
  };
})();

count = 10;
counter();
console.log(count);

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Vector database on top of Postgres for AI

🌲 Node.js Adds Experimental Support for TypeScript

Wes Bos

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Vector database on top of Postgres for AI

❓ CHALLENGE

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

console.log(b.value);
console.log(a.value);

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‼️ Astro 4.12: Say Hello to Server Islands

The flexible Astro framework for building modern content-based sites continues to go from strength to strength. v4.12 includes a new concept of server islands, a way to integrate static HTML and server-side generated components together.

Erika and Phillips (Astro)

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CHALLENGE ❓

const obj = { a: 1, b: 2 };
Object.defineProperty(obj, 'b', { value: 3, writable: false });

obj.b = 4;
console.log(obj.b);

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❓ So You Think You Know Box Shadows?

The author indulges his creative side with some fun experiments into what he calls “some of the worst possible things” you can do with box shadows on a DIV element, coupled with JavaScript.

David Gerrells

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CHALLENGE ❓

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

const { b } = obj;
console.log(b());

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😉 Don't Use JS for That: Moving Features to CSS and HTML by Kilian Valkhof

Packed with code and examples. Some techniques aren’t universally supported yet, but there’s a lot that the browser can offer that you don’t need to reimplement yourself, like color picking, modals, and animations.

Kilian Valkhof