JavaScript
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A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript πŸš€ Don't miss our Quizzes!

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Wow check this out fully typed Vue components 🌲

Features

- Dark mode support
- Keyboard shortcuts
- Icons
...


ManukMinasyan
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❀5πŸ‘22
❓ CHALLENGE

const a = [1, 2, 3];
const b = a.findIndex(x => x === 4);
console.log(b);
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❀6πŸ€”4
What is the output?
Anonymous Quiz
19%
0
10%
1
18%
3
53%
-1
πŸ‘1512❀5
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❀9πŸ‘65
❓ CHALLENGE

const a = { a: 1 };
const b = Object.seal(a);
b.a = 2;
console.log(a.a);
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πŸ‘8❀2
πŸ€”28πŸ‘14❀5
βœŒοΈπŸŒ• Some Cross-Browser DevTools Features You Might Not Know

Explore the awesome and incredibly useful DevTools features that are supported in Chromium, Firefox, and Safari alike.

Pankaj Parashar
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πŸ‘133❀2
CHALLENGE ❓


let sum = 0;
for (let i = 0; i < 3; i++, sum++) { sum *= i }

console.log(sum);
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🀣29πŸ€”128❀6πŸ‘6
What is the output?
Anonymous Quiz
29%
4
18%
5
35%
0
18%
Error
πŸ€”30πŸ‘10🀣6❀4
✌️ A Proposal to Add Signals to JavaScript

A (very) early stage proposal for bringing a new feature to ECMAScript/JavaScript: signals! The proposal brings aboard ideas from a swathe of popular frameworks and aims to align everyone and get us on the same page when it comes to working with state and making updates based upon changes to state. Rob writes more about the proposal here.

ROB EISENBERG AND DANIEL EHRENBERG
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πŸ‘115❀3
CHALLENGE ❓
let x = 5;
let y = (x = 10) + 3;

console.log(x, y);
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❀5πŸ‘5πŸ€”4
What is the output?
Anonymous Quiz
63%
10 13
7%
10 5
13%
5 3
18%
Error
🀣21πŸ€”16πŸ‘1313❀5
πŸ‘€ Cally: Small, Feature-Rich Calendar Components

A collection of open-source calendar components for selecting single dates or date ranges. Framework-agnostic, themeable, localizable, and accessible (it even has an accessibility statement showing its commitment to this area).

NICK WILLIAMS
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πŸ‘13🀣2❀1🀩11
❓ CHALLENGE

console.log(3 > 2 > 1);
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πŸ‘11πŸ€”98
What is the output?
Anonymous Quiz
59%
true
25%
false
7%
Nan
9%
Syntax Error
🀣55πŸ€”24πŸ‘1615❀9
🍊 What Even Is a JSON Number?

Despite the presence of standards around JSON, the answer is more complicated than you’d think, particularly when it comes to interfacing with other ecosystems and languages that aren’t JavaScript.

BRIAN TERLSON
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πŸ‘11πŸ€”3❀22
❓ CHALLENGE

console.log('1' - - '1');
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❀15πŸ‘4
What is the output?
Anonymous Quiz
28%
2
6%
10
35%
11
32%
0
πŸ€”40🀣21πŸ‘1512❀11
🟠 svelte-zoomable-circles: Svelte Component for Browsing Hierarchical Data

A Svelte component for displaying and browsing hierarchical data using zoomable circles. Live demo.

TYLER BERBERT
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5❀4πŸ‘4
❓ CHALLENGE

console.log(typeof NaN === 'number');
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8πŸ‘1
What is the output?
Anonymous Quiz
45%
false
35%
true
12%
NaN
8%
Syntax Error
🀣35πŸ‘18πŸ€”106❀5