What is an event loop in JavaScript?

In JavaScript, the event loop is a mechanism that allows for asynchronous and non-blocking behavior. It is the way that JavaScript handles multiple things happening at once. The event loop continuously monitors the call stack and the task queue. When the call stack is empty, the event loop takes the first function in the task queue and pushes it onto the call stack, where it will be executed. This process continues indefinitely, allowing JavaScript to handle multiple tasks simultaneously without blocking the main thread.