uevents.js

uevents.js

Micro events library for javascript. It works in the browser and has support for CommonJS and AMD loading built in. It can also be used on the server through node.js, but for most applications usage of the native events API should suffice.

This library has no external dependencies and weights less than 1kb when minified and gziped.

Complete API documentation is available here.

Basic Usage

You can create a new uevents object on which you can register callbacks for named events, and unregister callbacks for named events, and trigger events.

    // create new uevents object
    var obj = uevents.create();

    // register callback for signal receiving two parmeters
    obj.on('signal', function (a, b) {
        console.log("a: " + a + ", b: " + b);
    });

    // trigger signal with 'A' and 'B'
    // should print "a: A, b: B"
    obj.trigger('signal', 'A', 'B');

    // trigger signal with 5 and 6
    // should print "a: 5, b: 6"
    obj.trigger('signal', 5, 6);

    // remove all callbacks for 'signal'
    obj.off('signal');

    // trigger signal 'A' and 'B'
    // nothing happens, no callbacks registered
    obj.trigger('signal', 'A', 'B');

You can also extend an existing object to allow it to emit and receive events using the same API.

    var obj = new ComplicatedCustomObject();

    uevents.create(obj);

    // register callback for 'signal'
    obj.on('signal', function () {
        console.log('signal emitted');
    });

    // trigger callbacks for 'signal'
    obj.trigger('signal');