JavaScript Event Loop Explained in Simple Words

JavaScript Event Loop Explained in Simple Words JavaScript is single-threaded . That means it can do one task at a time . But then a question comes… If JavaScript runs one thing at a time, how does it handle: setTimeout API calls Promises async/await 👉 The answer is Event Loop . 🧠 First, Understand This JavaScript runtime has 4 important parts: Call Stack – where code runs Web APIs – handles timers, fetch, DOM events Callback Queue – waiting area for async tasks Event Loop – the manager 🍽 Real-Life Example (Very Simple) Imagine a restaurant with only one chef 👨‍🍳 Two customers order: Tea (fast) Biryani (takes time) The chef: Starts cooking biryani Serves tea meanwhile When biryani is ready → serves it The chef does not stand waiting. That smart system = Event Loop ⚙️ How Event Loop Works Step 1: Code runs in the Call Stack Step 2: Async tasks (like setTimeout) go to Web APIs Step 3: After completion, they move to Callback Queue Step 4: Event Loop keeps checking: “Is the Call Stack empt