Dispatching events to a .subscribe JavaScript method -

i've been stuck on , i'm coming guys last resort. have javascript file (parent.js) loading .js file (child.js). parent.js file has event subscription:

class.prototype.subscribe('someevent', someeventhandler) 

very similar facebook does:

fb.event.subscribe('auth.authresponsechange', auth_response_change_callback); fb.event.subscribe('auth.statuschange', auth_status_change_callback); 

i'm trying understand how child.js can dispatch (or broadcast) someevent someeventhandler gets fired.

it seems see tells how add listener, nothing how dispatch event handle method attached listener.

references: api-docs https://developers.facebook.com/docs/reference/javascript/fb.event.subscribe/v2.3

someone similar resolved issue, i'm not using fb sdk, using example make objective clearer:

fb.event.subscribe not firing events

event dispatching in general: https://developer.mozilla.org/en-us/docs/web/guide/events/creating_and_triggering_events

thanks ton in advance.

it appears though might using sort of library wasn't mentioned.

with said, here example of using custom events html , pure javascript.

html...

<button onclick="triggerthething()">trigger thing</button> <br /> <span id="listeningelement1">listening element</span> 

and javascript...

myelement = document.getelementbyid("listeningelement1"); myelement.addeventlistener("triggeredevent", function (e) {     this.innerhtml = e.detail.message; });  function triggerthething() {     var newevent = new customevent("triggeredevent", {         detail: {             message: "it triggered!"         }     });     myelement.dispatchevent(newevent); } 

one thing tripped me while learning need dispatch event on element listening event.

here's jsfiddle of in action: http://jsfiddle.net/4z891lwl/

props guy: http://davidwalsh.name/customevent