c5169e0e
 Renato De Donato
a new hope
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iron-signals
============
`iron-signals` provides basic publish-subscribe functionality.
Note: avoid using `iron-signals` whenever you can use
a controller (parent element) to mediate communication
instead.
To send a signal, fire a custom event of type `iron-signal`, with
a detail object containing `name` and `data` fields.
```javascript
this.fire('iron-signal', {name: 'hello', data: null});
```
To receive a signal, listen for `iron-signal-<name>` event on a
`iron-signals` element.
```html
<iron-signals on-iron-signal-hello="helloSignal">
```
You can fire a signal event from anywhere, and all
`iron-signals` elements will receive the event, regardless
of where they are in DOM.
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