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What is the function used to deregister event handler ‘f’?(a) deleteAllListeners(name)(b) deleteListener(name,f)(c) removeListener(name,f)(d) removeAllListeners(name)This question was addressed to me in an interview for internship.This is a very interesting question from Server-Side JavaScript topic in chapter Server-Side and Client-Side Scripting of JavaScript

Answer»

The correct answer is (C) removeListener(name,F)

BEST EXPLANATION: The removeEventListener() method removes an event handler that has been attached with the addEventListener() method. The removeListeners(name,f) is used to deregister event handler f REPRESENTED as :

emitter.removeListener(name,f)



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