channel-dispatcher

A tiny channel subscribe/publish library.

Basic usage.

// require library
var dispatcher = require('channel-dispatcher');

// subscribe callback
// sub is needed to unsubscribe later
var sub = dispatcher.subscribe('test', function(data) {
  console.log(data);
});

// pass data to channel
// in this case 'Hello to channel' will be printed
dispatcher.publish('test', 'Hello to channel');

// unsubscribe callback from channel
sub.unsubscribe();

Using standalone channel object.

// require library
var dispatcher = require('channel-dispatcher');

// get channel object
var channel = dispatcher.getChannel('test');

// subscribe callback
// sub is needed to unsubscribe later
var sub = channel.subscribe(function(data) {
  console.log(data);
});

// pass data to channel
// in this case 'Hello to standalone channel' will be printed
channel.publish('Hello to standalone channel');

// unsubscribe callback from channel
sub.unsubscribe();

Specifying context

You can pass context along with callback

// context object
var context = {foo: "context data"};

// callback
var callback = function(bar) {
  var foo = this.foo;
  console.log(foo + " " + bar);
};

// subscribe callback with context
dispatcher.subscribe('test', callback, context);
// or using channel object
// channel.subscribe(callback, context)

// pass data
// 'context data passed data' will be printed
dispatcher.publish('test', "passed data");

Show warnings

Warnings is disabled by default.

// show warnings
dispatcher.setLogging(true);