Simple pub/sub script.

README.MD

#Basic Pub / Sub Based off of this gist by learncodeacademy.

The min.js version removes ViewLedger funciton.

emitter.js

var emitter = (function() {
    "use strict";

    //VARS
    var _name = 'Emitter';
    var ledger = {}; // Stores the subscribed callbacks to be triggered on event emit.

    //GETTERS

    // Return a view of the ledger / mostly for fun
    function viewLedger() {

        var l = ledger;

        return l;

    }

    // FUNCTIONS

    // subscribe to an event
    function subscribe(eventName, fn) {

        console.debug('%s [ subscribe ] : ( %s )', _name, eventName);

        // Creates an empty array on the ledger object if one doesn't exist already
        ledger[eventName] = ledger[eventName] || []; 

        // Add the function to be called when this event is emitted
        ledger[eventName].push(fn);

    }

    // unsubscribe an event
    function unsubscribe(eventName, fn) {

        console.debug('%s [ unsubscribe ] : ( %s )', _name, eventName);

        if (ledger[eventName]) {

            for (var i = 0; i < ledger[eventName].length; i++) {

                if (ledger[eventName][i] === fn) {

                    ledger[eventName].splice(i, 1);

                    break;
                }
            }
        }
    }

    // Emit event(s)
    function emit(eventName, data) {

        console.debug('%s [ emit ] : ( %s )', _name, eventName);

        if (ledger[eventName]) {
            
            console.debug('\tFound( %s ) %s to emit.', ledger[eventName].length, eventName);

            ledger[eventName].forEach(function (fn) {

                fn(data); // call the fn of each "subscribed" event

                console.debug('\t\t callback ran:', fn.toString().split(' ')[1]);

            });

        }
        else {

            console.debug('\t No Subscribers');

        }
    }


    //EXPOSE
    return {
        ViewLedger:   viewLedger,
        Subscribe:    subscribe,
        Unsubscribe:  unsubscribe,
        Emit:         emit
    };

})();

emitter.min.js

var emitter=function(){"use strict";function i(i,n){t[i]=t[i]||[],t[i].push(n)}function n(i,n){if(t[i])for(var r=0;r<t[i].length;r++)if(t[i][r]===n){t[i].splice(r,1);break}}function r(i,n){t[i]&&t[i].forEach(function(i){i(n)})}var t={};return{Subscribe:i,Unsubscribe:n,Emit:r}}();