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| export class PubSub { | |
| constructor() { | |
| this._subs = new Map() | |
| } | |
| subscribe(action, fn) { | |
| if (!this._subs.has(action)) { | |
| this._subs.set(action, new Set()) | |
| } | |
| this._subs.get(action).add(fn) | |
| } | |
| unsubscribe(action, fn) { | |
| const sub = this._subs.get(action) | |
| sub && sub.delete(fn) | |
| } | |
| publish(action, ...payload) { | |
| const sub = this._subs.get(action) | |
| sub && sub.forEach(fn => fn(...payload)) | |
| } | |
| } |
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Compatible with Lightning JS on RDK WPEBrowser - without the latest ES features