This is a tiny event system, sometimes called a "message bus"; or "bus" for short, and carries a similar API to the likes of the NodeJS Event Emitter - stripped down to the bare essentials: on, off, and emit
Usage:
--create a new emitter with the pubsub() function
emitter = pubsub()
--listen to an event
emitter.on("foo", function (e) print('foo'..e) end )
--fire an event
emitter.emit('foo', { a='b' })
--working with handler references:
function onFoo() end
emitter.on('foo', onFoo) // listen
emitter.off('foo', onFoo) // unlisten |
DEMO
API
emit
Invoke all handlers for the given type.
Method emit(string, event)
| parameter | type | description |
| type | string | The event type to invoke |
| evt | any | Any value (table is recommended), passed to each handler |
--emit() example:
channel.emit('awesomeness', stuff)
|
on
Register an event handler for the given type.
Method on(string, event)
| parameter | type | description |
| type | string | String Type of event to listen for |
| handler | Function | Function to call in response to given event |
--on() example:
channel.on('awesomeness', awesomeHandler)
|
off
Remove an event handler for the given type.
Method off(string, event)
| parameter | type | description |
| type | string | Type of event to unregister handler from |
| handler | Function | Handler function to remove |
--off() example:
channel.off('awesomeness', awesomeHandler)
|
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