afterjs - Simple Event Aggregation API for JavaScript

afterjs is JavaScript utility that makes it slightly easier to wait for multiple events. One of the use cases is to defer execution of code until multiple dependencies is initialized. It is especially helpful when one or more of the dependencies initialize asynchronously.

It is compatible with, but not require, AMD such as requirejs.

Example

Consider the following examples,

require(['after-singleton', 'jQuery'], function(after, $) {
    $(document).bind('ready', function() {
        after.happen('dom-ready');
    });
});

require(['after-singleton', 'lib1'], function(after, lib1) {
    var mylib = lib1();
    mylib.bind('initialized', function() {
        after.happen('lib1-initialized');
    });
});

require(['after-singleton', 'jQuery'], function(after, $) {
    after.after(['dom-ready'], function() {
        $(body).find('#ads_container').load(ads_url, function() {
          after.happen('ads-loaded');
        });
    });
});

require(['after-singleton'], function(after) {
    after.after(['dom-ready', 'lib1-initialized', 'ads-loaded'], function() {
        /* code to be executed after all events "happened" */
    });
});

Test

afterjs is unit tested with Evidence.js. You can also run all tests on command line:

phantomjs lib/test/runner.coffee

License

It is released under BSD-Style License. See LICENSE.txt.