❓ CHALLENGE

var x = 1;
console.log(x+++x);

I HACKED A CAR IN JAVASCRIPT!!! 👀

I built a web tool to hack wireless devices right from the browser and I used it to run a rolljam/replay attack against my friend's car (with consent of course) and IT WORKED!!!

@devdevcharlie

❓ CHALLENGE

var x = 1;
console.log(x++ + ++x);

👀 Quill 2.0: A Powerful Rich Text Editor for the Web

A major release and significant modernization for the open source WYSIWYG editor. In Announcing Quill 2.0, we learn about Quill’s transition to TypeScript and improved use of modern browser features, but there’s more going on too, such as its ESM packaging. Want to play with some code? There’s a playground.

SLAB INC.

❓ CHALLENGE

function Person(name) {
  this.name = name;
}
Person.prototype.getName = function() {
  return this.name;
}
var person1 = new Person('Alice');
console.log(person1.hasOwnProperty('getName'));

🥶 Building a CLI from Scratch with TypeScript and oclif

oclif is a mature CLI tool development framework maintained by Salesforce. This tutorial goes from zero to something that works.

JOSH CUNNINGHAM

❓ CHALLENGE

const clothes = ['shirt', 'socks', 'jacket', 'pants', 'hat']
clothes.length = 0
 
console.log(clothes[3])

🔥 Visualizing Algorithms

This fantastic post is now ten years old, but I revisited it recently and it’s such a joy. Mike Bostock (of D3.js fame) visually guides us through some algorithms using both demos and code.

MIKE BOSTOCK

❓ CHALLENGE

const obj = {};
obj.length = 5;
console.log(obj.length);

Netflix's hello world page 😂

❓ CHALLENGE

const obj = {};
Object.defineProperty(obj, 'length', { get: () => Math.random() });
console.log(obj.length);