2721. Run Async Functions in Parallel | JavaScript PromiseAll Clone

Welcome to Day 19 of the 30 Days of JavaScript challenge! ⚡

Today’s challenge is "2721. Execute Asynchronous Functions in Parallel" – you're building your own version of Promise.all()! 🔥

📌 What You’ll Learn:
✅ How to run multiple async functions in parallel
✅ How to collect results in order
✅ How to return early on failure
✅ Real-world async mastery: API batching, parallel processing

🔗 LeetCode Problem:
https://leetcode.com/problems/execute-asynchronous-functions-in-parallel

💡 Mastering promises and concurrency is key to becoming a true JavaScript pro. This one’s a must-know!

If this helped you:
👍 Like the video
💬 Comment how you’d handle errors differently
🔔 Subscribe for more daily JS coding shorts

#JavaScript #LeetCode #PromiseAll #AsyncAwait #WebDevelopment #JSChallenge #30DaysOfJavaScript #FrontendTips #Concurrency #CodeShorts