CHALLENGE ❓
Promise.resolve(1)
.then(value => {
console.log(value);
throw new Error('Something went wrong');
})
.then(() => {
console.log('This will not run');
})
.catch(error => {
console.log('Caught:', error.message);
return 42;
})
.then(value => {
console.log('Recovered with:', value);
});
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CHALLENGE ❓
const sym = Symbol('unique');
const obj = {
[sym]: 'Secret',
public: 'Visible'
};
console.log(Object.keys(obj));
console.log(obj[Symbol('unique')]);
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What is the output?
Anonymous Quiz
31%
[‘public’, Symbol(‘unique’)], Secret
34%
[‘public’, Symbol(‘unique’)], undefined
23%
[‘public’], undefined
13%
[‘public’], Secret
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npx is-my-node-vulnerable
A tool created and maintained by the Node.js security team. This utility allows you to quickly check for known vulnerabilities and helps safeguard your projects.
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CHALLENGE
for (var i = 0; i < 3; i++) {
setTimeout(() => console.log(i), 100);
}
❤4👍3
🤔25👍14🤩6🔥5🤣2
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CHALLENGE
function Person(name) {
this.name = name;
}
Person.prototype.greet = function () {
console.log(`Hello, ${this.name}`);
};
const person = new Person('Alice');
person.greet();
console.log(person.hasOwnProperty('greet'));
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What is the output?
Anonymous Quiz
46%
Hello, Alice; true
33%
Hello, Alice; false
10%
Error
11%
Hello, Alice; undefined
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Say hello to the newest release line of Node.js that gets all the cutting edge features first (Node 22 will soon become the active LTS release). v23 notably enables support for loading ES modules with
require() by default, drops 32-bit Windows support, and node --run goes stable.Rafael Gonzaga
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What is the output?
Anonymous Quiz
18%
"number", true
22%
"undefined", false
30%
"number", false
30%
"NaN", true
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CHALLENGE
async function test() {
console.log(1);
await new Promise(resolve => setTimeout(resolve, 1000));
console.log(2);
return 3;
}
console.log(4);
test().then(console.log);
console.log(5);
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What is the output?
Anonymous Quiz
43%
4, 1, 5, 2, 3
31%
4, 1, 2, 5, 3
21%
1, 4, 2, 3, 5
5%
1, 4, 2, 5, 3
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A two hour walkthrough of using the Kaplay game library (formerly known as Kaboom.js) to build a complete, if simple, Sonic-branded game. You can also play it here.
JSLegendDev
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CHALLENGE
function Animal(name) {
this.name = name;
}
Animal.prototype.sound = 'Generic sound';
const dog = new Animal('Dog');
Animal.prototype.sound = 'Bark';
console.log(dog.sound);
👍3
🤣14👍10❤4🤩2
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