Question

How to create and fire event in Node.js

Answer 1

const events = require('events');
const eventEmitter = new events.EventEmitter();

const createMyEventHandler = function () {
  console.log('createMyEventHandler');
}

// Assign createMyEventHandler to 'gonodego' event
eventEmitter.on('gonodego', createMyEventHandler);

// Fire 'gonodego' event:
eventEmitter.emit('gonodego');
  
 
  
/*
run:
  
createMyEventHandler
  
*/

 

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Answer 2

const events = require('events');
const eventEmitter = new events.EventEmitter();
 
// Register (add) a listener
eventEmitter.on('gonodego', function() {
    console.log("text");
});
 
// Fire (Raise) an event:
eventEmitter.emit('gonodego');
   
  
   
/*
run:
   
text
   
*/

 

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