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    microevent

    1.0.0 • Public • Published

    MicroEvent.js

    MicroEvent.js is a event emitter library which provides the observer pattern to javascript objects. It works on node.js and browser. It is a single .js file containing a 20 lines class (only 321-bytes after minification+gzip).

    How to Use It

    You need a single file microevent.js. Include it in a webpage via the usual script tag.

    <script src="microevent.js"></script>
    

    To include it in a nodejs code isnt much harder

    var MicroEvent = require('./microevent.js')
    

    Now suppose you got a class Foobar, and you wish it to support the observer partern. do

    MicroEvent.mixin(Foobar)
    

    That's it. The repository contains an example in browser and an example in nodejs. Both use the same code in different contexts. Let me walk you thru it.

    Example

    First we define the class which gonna use MicroEvent.js. This is a ticker, it is triggering 'tick' event every second, and add the current date as parameter

    var Ticker = function(){
        var self = this;
        setInterval(function(){
            self.trigger('tick', new Date());
        }, 1000);
    };
    

    We mixin MicroEvent into Ticker and we are all set.

    MicroEvent.mixin(Ticker);
    

    Now lets actually use the Ticker Class. First, create the object.

    var ticker = new Ticker();
    

    and bind our tick event with its data parameter

    ticker.bind('tick', function(date) {
        console.log('notified date', date);
    });
    

    And you will see this output:

    notified date Tue, 22 Mar 2011 14:43:41 GMT
    notified date Tue, 22 Mar 2011 14:43:42 GMT
    ...
    

    Conclusion

    MicroEvent.js is available on github here under MIT license. If you hit bugs, fill issues on github. Feel free to fork, modify and have fun with it :)

    Keywords

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    Install

    npm i microevent

    DownloadsWeekly Downloads

    1,456

    Version

    1.0.0

    License

    none

    Last publish

    Collaborators

    • jetienne