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- {"version":3,"file":"subscribable.esm.js","sources":["../../src/subscribable.ts"],"sourcesContent":["type Listener = () => void\n\nexport class Subscribable<TListener extends Function = Listener> {\n protected listeners: Set<{ listener: TListener }>\n\n constructor() {\n this.listeners = new Set()\n this.subscribe = this.subscribe.bind(this)\n }\n\n subscribe(listener: TListener): () => void {\n const identity = { listener }\n this.listeners.add(identity)\n\n this.onSubscribe()\n\n return () => {\n this.listeners.delete(identity)\n this.onUnsubscribe()\n }\n }\n\n hasListeners(): boolean {\n return this.listeners.size > 0\n }\n\n protected onSubscribe(): void {\n // Do nothing\n }\n\n protected onUnsubscribe(): void {\n // Do nothing\n }\n}\n"],"names":["Subscribable","constructor","listeners","Set","subscribe","bind","listener","identity","add","onSubscribe","delete","onUnsubscribe","hasListeners","size"],"mappings":"AAEO,MAAMA,YAAN,CAA0D;AAG/DC,EAAAA,WAAW,GAAG;AACZ,IAAA,IAAA,CAAKC,SAAL,GAAiB,IAAIC,GAAJ,EAAjB,CAAA;IACA,IAAKC,CAAAA,SAAL,GAAiB,IAAKA,CAAAA,SAAL,CAAeC,IAAf,CAAoB,IAApB,CAAjB,CAAA;AACD,GAAA;;EAEDD,SAAS,CAACE,QAAD,EAAkC;AACzC,IAAA,MAAMC,QAAQ,GAAG;AAAED,MAAAA,QAAAA;KAAnB,CAAA;AACA,IAAA,IAAA,CAAKJ,SAAL,CAAeM,GAAf,CAAmBD,QAAnB,CAAA,CAAA;AAEA,IAAA,IAAA,CAAKE,WAAL,EAAA,CAAA;AAEA,IAAA,OAAO,MAAM;AACX,MAAA,IAAA,CAAKP,SAAL,CAAeQ,MAAf,CAAsBH,QAAtB,CAAA,CAAA;AACA,MAAA,IAAA,CAAKI,aAAL,EAAA,CAAA;KAFF,CAAA;AAID,GAAA;;AAEDC,EAAAA,YAAY,GAAY;AACtB,IAAA,OAAO,IAAKV,CAAAA,SAAL,CAAeW,IAAf,GAAsB,CAA7B,CAAA;AACD,GAAA;;AAESJ,EAAAA,WAAW,GAAS;AAE7B,GAAA;;AAESE,EAAAA,aAAa,GAAS;AAE/B,GAAA;;AA9B8D;;;;"}
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