When an asynchronous task completes (like a setTimeout timer expiring or a fetch promise resolving), its corresponding callback function is placed into an execution queue. The Event Loop's job is to continually monitor the Call Stack. If the Call Stack is empty, it pushes the next pending callback onto the stack to be executed.
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Key Topics Covered in "Happy Rawat JavaScript Interview Questions PDF" When an asynchronous task completes (like a setTimeout
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Both techniques limit how often a function executes, which is vital for optimizing performance-heavy event listeners (like scrolling or typing).
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When you attempt to access a property or a method on an object, JavaScript follows a specific lookup path:
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