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3,3,3 (not 0,1,2) because var is function-scoped and the closure captures the same i .
Holds callbacks from Promises, async/await , and MutationObserver . This queue has higher priority. happy rawat javascript interview questions pdf free best
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If a DOM element is removed but a setInterval or event listener still references it, the memory cannot be freed. Always clear intervals and remove listeners inside cleanup loops or component unmount phases. After an exhaustive search across their official channels
Manipulating the this context is a landmark skill for senior JavaScript developers. 5. Differentiate between call , apply , and bind
: Handles asynchronous operations like setTimeout , DOM events, and fetch requests.
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