Microtask Heist

JS Fundamentals · Event Loop Mastery

Easy

💰 Score: 0

🔥 Streak: 0

Heist Toolkit

Microtask Queue

⚡ queueMicrotask(…) microtask

Promise API

✅ Promise.resolve(…) resolved

❌ Promise.reject(…) rejected

→ .then(v => log(v)) microtask

🪤 .catch(e => log(e)) microtask

🔚 .finally(() => log('__')) microtask

Async / Await

⏳ await Promise.resolve(…) boundary

🔀 async fn wrapper async

Synchronous

📝 log('value') sync

Mission Brief

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🕵️

Drag blocks here to build your sequence

🎯 Required Output

💻 Your Output

⚡ Microtask Queue

Empty — run code to populate

🔄 Event Loop State

📚 Call Stack 0

⚡ Microtask Queue 0

⏰ Macro Queue 0

🖼️ Render / Paint blocked

Queue Starvation

Microtask depth 0 / 10

💡 Boundary Hint

Click Hint to reveal where the microtask boundary is crossed in this level.

📋 Operations