How does JavaScript’s event loop work?
Asked on Jul 22, 2024
Answer
The JavaScript event loop is a mechanism that allows JavaScript to perform non-blocking operations by handling asynchronous events. It continuously checks the call stack and the message queue to execute code, collect events, and process messages.
console.log("Start");
setTimeout(() => {
console.log("Timeout");
}, 0);
console.log("End");Additional Comment:
✅ Answered with JavaScript best practices.- The code above demonstrates the event loop in action.
- "Start" is logged first because it is executed immediately.
- "End" is logged next, as the `setTimeout` callback is placed in the message queue.
- "Timeout" is logged last, after the call stack is empty and the event loop processes the message queue.
- The event loop allows JavaScript to handle asynchronous operations efficiently.
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