CODEWITHSUNDEEP
javascriptnode.jseventsevent-handling
2trill2spill
2trill2spill

Reputation: 1383

Event emitter, object is not function

I created an event in node.js but when I try to trigger the event and pass arguments to the callback I get eventEmitter("dataIn", null, message); TypeError: object is not a function. Looking at similar stack overflow questions the problem was not using new to create the eventEmitter, but I am.

First I setup the event.

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

Then I set the callback.

 function dataIn(config, callback) {
   if(typeof callback === 'function') {

     /* Set the callback for the dataIn event. */
     eventEmitter.on("dataIn", callback);

     /* More code below. */

Finally when I try to emit the event I get the type error.

var message = {
  "type": "REQUEST"
}

var rtrn = eventEmitter("dataIn", null, message);
if(rtrn === false) {
  console.log('Error triggering event');
}

Upvotes: 2

Views: 7656

Answers (1)

Pointy
Pointy

Reputation: 414036

The EventEmitter instance isn't a function; you're trying to call it as if it were. You need to call the .emit() method:

eventEmitter.emit("dataIn", null, message);

Upvotes: 3

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