JavaScript

🌲 Node weekly #546

CHALLENGE

const obj = {
  value: 42,
  getValue() {
    return Math.max(this.value, 50);
  }
};

const obj2 = {
  value: 25,
  getValue: obj.getValue
};

console.log(obj.getValue());
console.log(obj2.getValue());

Material UI v6 is out now 🎉 At ten years old, the popular design system has its latest major release. There's a focus on improved theming, color scheme management, container queries, and React 19 support. There are revamped templates to be inspired by, too. García, Bittu, Andai, et al.

CHALLENGE

const obj = {
  a: 1,
  b: 2,
  getSum() {
    return this.a + this.b;
  }
};

const cloneObj = { ...obj, getSum() { return this.b + this.a; } };

console.log(obj.getSum());
console.log(cloneObj.getSum());

😆 So true ...

CHALLENGE

function createCounter() {
  let count = 0;
  return {
    increment() {
      count++;
      return count;
    },
    getCount() {
      return count;
    }
  };
}

const counter = createCounter();

console.log(counter.increment());
console.log(counter.getCount());
console.log(counter.increment());
console.log(counter.getCount());

🍊 Rspack 1.0: The Rust-Powered JavaScript Bundler Far from being ‘yet another bundler’ with its own approach and terminology to learn, Rspack prides itself on being webpack API and ecosystem compatible, while offering many times the performance. The team now considers it production ready and encourages you to try your webpack-based projects on it. Rspack Contributors

❓ CHALLENGE

const numbers = [0,0,0];

let i = 0;
const result = numbers.reduce((acc, _) => {
  return ++acc;
}, i);

console.log(i, result);

Sponsored by Bryntum 👮‍♀️ World Class Web Components ❓ CHALLENGE

const obj = {
  outer: 1,
  inner: {
    outer: 10,
    inner: 20
  }
};

let result = 0;

with (obj) {
  result += outer;
  with (inner) {
    result += outer + inner;
  }
}

console.log(result);

Sponsored by Bryntum 👮‍♀️ World Class Web Components ✌️ JS Dates are About to Be Fixed Handling dates and times is famously a painful area for programmers and JavaScript hasn’t done a lot to make it easier. Libraries like Moment.js help a lot, but Iago looks at how the Temporal proposal and its features will begin to help a lot more over time. Iago Lastra

Sponsored by Bryntum 👮‍♀️ World Class Web Components 🌲 How to Create an NPM Package in 2024 Sounds simple, but there are a lot of steps involved if you want to follow best practices, introduce useful tools, and get things just right. Matt Pocock walks through the process here, and there’s a 14-minute screencast too, if you’d prefer to watch along. Matt Pocock

Sponsored by Bryntum 👮‍♀️ World Class Web Components ❓ CHALLENGE

const weakMap = new WeakMap();
const arr = [{}, {}, {}];

arr.forEach((obj, index) => weakMap.set(obj, index));

arr.splice(1, 1); // Remove the second element

const result = arr.map(obj => weakMap.get(obj));

console.log(result);

Sponsored by Bryntum 👮‍♀️ World Class Web Components ❓ CHALLENGE

const weakMap = new WeakMap();
const arr = [1, 2, 3, 4];
const objs = arr.map(n => ({ n }));

objs.forEach((obj, index) => weakMap.set(obj, arr.slice(0, index + 1)));

const result = objs.map(obj => weakMap.get(obj).reduce((acc, num) => acc + num, 0));

console.log(result);