JavaScript@javascript · channel · 30 984 subscribers✅ High trust

Post CHALLENGE

11 October 2026

JavaScript

CHALLENGE const output = []; output.push(typeof foo); try { output.push(typeof bar); } catch (e) { output.push(e.message); } var foo = () => 'foo'; let bar = () => 'bar'; console.log(output.join(' | '));

812 · 06:31

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JavaScript06:31CHALLENGE async function main() { const settled = await Promise.allSettled([ Promise.resolve(1), Promise.reject('err'), ]); const statuses = settled.map(s => s.J

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JavaScript06:32CHALLENGE const arr = [1, [2, 3], [4, [5, 6]]]; const a = arr.flat(); const b = arr.flat(Infinity); const c = arr.flatMap(x => Array.isArray(x) ? x : [x, x]); c

JavaScript@javascript · channel · Tech

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