@tanstack/query-core
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The framework agnostic core that powers TanStack Query
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{"version":3,"sources":["../../src/subscribable.ts"],"sourcesContent":["type Listener = () => void\n\nexport class Subscribable<TListener extends Function = Listener> {\n protected listeners: Set<TListener>\n\n constructor() {\n this.listeners = new Set()\n this.subscribe = this.subscribe.bind(this)\n }\n\n subscribe(listener: TListener): () => void {\n this.listeners.add(listener)\n\n this.onSubscribe()\n\n return () => {\n this.listeners.delete(listener)\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"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAEO,IAAM,eAAN,MAA0D;AAAA,EAG/D,cAAc;AACZ,SAAK,YAAY,oBAAI,IAAI;AACzB,SAAK,YAAY,KAAK,UAAU,KAAK,IAAI;AAAA,EAC3C;AAAA,EAEA,UAAU,UAAiC;AACzC,SAAK,UAAU,IAAI,QAAQ;AAE3B,SAAK,YAAY;AAEjB,WAAO,MAAM;AACX,WAAK,UAAU,OAAO,QAAQ;AAC9B,WAAK,cAAc;AAAA,IACrB;AAAA,EACF;AAAA,EAEA,eAAwB;AACtB,WAAO,KAAK,UAAU,OAAO;AAAA,EAC/B;AAAA,EAEU,cAAoB;AAAA,EAE9B;AAAA,EAEU,gBAAsB;AAAA,EAEhC;AACF;","names":[]}