How does the event loop handle callback functions in JavaScript?

  • It executes callbacks immediately when encountered
  • It adds callbacks to the call stack for execution
  • It delegates callbacks to the message queue for later execution
  • It ignores callbacks entirely
The event loop in JavaScript works by constantly checking the call stack and message queue. When the call stack is empty, it picks up tasks from the message queue, including callback functions, and adds them to the call stack for execution. This ensures asynchronous operations are handled in a non-blocking way.
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