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learncodeacademy/pubsub.js

Created July 29, 2015 02:54
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Basic Javascript PubSub Pattern
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pubsub.js
//events - a super-basic Javascript (publish subscribe) pattern
var events = {
events: {},
on: function (eventName, fn) {
this.events[eventName] = this.events[eventName] || [];
this.events[eventName].push(fn);
},
off: function(eventName, fn) {
if (this.events[eventName]) {
for (var i = 0; i < this.events[eventName].length; i++) {
if (this.events[eventName][i] === fn) {
this.events[eventName].splice(i, 1);
break;
}
};
}
},
emit: function (eventName, data) {
if (this.events[eventName]) {
this.events[eventName].forEach(function(fn) {
fn(data);
});
}
}
};
@iskandarovBakshi
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Skhmt try events: Object.create( null )

@aki-anz
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aki-anz commented Oct 2, 2020 

var events = (function() {

    var events = {};

    function on(eventName, fn) {
        events[eventName] = events[eventName] || [];
        events[eventName].push(fn);
    }

    function off(eventName, fn) {
        if (events[eventName]) {
            for (var i = 0; i < events[eventName].length; i++) {
                if( events[eventName][i] === fn ) {
                    events[eventName].splice(i, 1);
                    break;
                }
            }
        }
    }

    function emit(eventName, data) {
        if (events[eventName]) {
            events[eventName].forEach(function(fn) {
                fn(data);
            });
        }
    }

    return {
        on: on,
        off: off,
        emit: emit
    };

})();

That’s iife

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