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JS Event Loop Visualizer

Step through JavaScript execution to understand the call stack, microtasks, macrotasks, and rendering

📝 JavaScript Code

600ms
Synchronous
Microtask (Promise)
Macrotask (setTimeout)
Render

📚 Call Stack

Empty

⚡ Microtask Queue

Empty

⏰ Macrotask Queue

Empty

🖥️ Console Output

// Output appears here

📋 Execution Log

Click "Run" then "Step" to trace execution