InterviewSolution
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InterviewSolution
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What is Event Emmitter? |
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Answer» EventEmitter class lies in events module. It is accessibly via following syntax − //import events modulevar events = require('events');//create an eventEmitter objectvar eventEmitter = new events.EventEmitter();When an EventEmitter instance faces any error, it emits an 'error' event. When new listener is added, 'newListener' event is fired and when a listener is removed, 'removeListener' event is fired. EventEmitter provides multiple properties like on and emit. on property is used to bind a function with the event and emit is used to fire an event. |
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