Tell me about the Event Loop: what is it and what parts does it consist of?

Event Loop is a mechanism in JavaScript and other single-threaded environments that allows asynchronous operations to be processed without blocking the main execution thread.

Main parts of the Event Loop:

1. Call Stack — stores the currently executing functions.
2. Callback Queue — a queue of tasks ready to be executed after asynchronous operations complete.
3. Event Loop — a cycle that constantly checks the call stack and callback queue. If the stack is empty, the Event Loop takes a task from the queue and pushes it onto the stack for execution.

Working process:

• Synchronous code executes immediately and occupies the call stack.
• Asynchronous operations (timers, network requests) send callbacks to the queue upon completion.
• The Event Loop monitors the stack and, when it is empty, transfers callbacks from the queue to the stack for execution.

This allows JavaScript to efficiently handle many operations without blocking the interface or creating additional threads.