event-dispatcher
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Alongside standard event emitting mechanism, this library provides some additional utilities like event aggregator and generic event dispatching repository.
This is an AMD library. To use it with Node.js and other CommonJS modules based environments I recommend jsloader/jsloader.
This library is partially modeled after symfony/EventDispatcher.
require([
"Bender/EventDispatcher/Event",
"Bender/EventDispatcher/EventDispatcher"
], function (Event, EventDispatcher) {
var eventDispatcher = new EventDispatcher();
eventDispatcher.getSupportedEvents = function () {
return ["a"];
};
eventDispatcher.addListener("a", function (evt) {
console.log("hello %s!", evt.data.place); // hello world
});
eventDispatcher.dispatch("a", new Event({ place: "world" }));
});
var auto = require("jsloader"),
eventAggregator,
eventDispatcherA,
eventDispatcherB,
Event = auto.load("Bender/EventDispatcher/Event"),
EventAggregator = auto.load("Bender/EventDispatcher/EventAggregator"),
EventDispatcher = auto.load("Bender/EventDispatcher/EventDispatcher");
eventAggregator = new EventAggregator();
eventDispatcherA.getSupportedEvents = function () {
return ["a"];
};
eventDispatcherB.getSupportedEvents = function () {
return ["b"];
};
eventAggregator.add(eventDispatcherA);
eventAggregator.add(eventDispatcherB);
eventAggregator.addListener("a", function (evt) {
console.log("hello %s!", evt.data.place); // hello world
});
eventAggregator.addListener("b", function (evt) {
console.log("hello %s!", evt.data.place); // hello planet
});
eventDispatcherA.dispatch("a", new Event({ place: "world" }));
eventDispatcherB.dispatch("b", new Event({ place: "planet" }));
// module/a.js
var eventAggregator,
eventDispatcherAB = require("foo").eventDispatcherAB,
eventDispatcherC = require("bar").eventDispatcherC;
eventAggregator = new EventAggregator();
eventAggregator.add(eventDispatcherAB);
eventAggregator.add(eventDispatcherC);
module.exports = eventAggregator;
// module/b.js
var a = require("a");
// eventDispatcherAB is going to handle this
a.addListener("a", function () {});
// eventDispatcherAB is going to handle this
a.addListener("b", function () {});
// eventDispatcherC is going to handle this
a.addListener("c", function () {});
define(["Bender/EventDispatcher/EventDispatcher/Repository"], function (Repository) {
var repository = new Repository();
repository.addListener(Repository.EVENT_ITEM_ADDED, function (evt) {
var item = evt.data.item,
repository = evt.data.repository;
console.log("added: " + item);
if (("world" === item) && 2148 !== (new Date().getFullYear())) {
// this one should not be here for some reason
repository.remove(item);
}
});
repository.addListener(Repository.EVENT_ITEM_REMOVED, function (evt) {
console.log("removed: " + evt.data.item);
});
repository.add("hello"); // added: hello
repository.add("world"); // added: world, removed: world
});
This repository follows Semantic Versioning convention.
FAQs
Alongside standard event emitting mechanism, this library provides some additional utilities like event aggregator and generic event dispatching repository.
The npm package event-dispatcher receives a total of 444 weekly downloads. As such, event-dispatcher popularity was classified as not popular.
We found that event-dispatcher demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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