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/**
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* part of Hachette
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* Facilitate listening to events
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*
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* Copyright (C) 2021 Wojtek Kosior
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* Redistribution terms are gathered in the `copyright' file.
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*/
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function make()
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{
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return new Set();
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}
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function subscribe(observable, cb)
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{
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observable.add(cb);
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}
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function unsubscribe(observable, cb)
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{
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observable.delete(cb);
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}
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function broadcast(observable, event)
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{
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for (const callback of observable)
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callback(event);
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}
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const observables = {make, subscribe, unsubscribe, broadcast};
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/*
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* EXPORTS_START
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* EXPORT observables
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* EXPORTS_END
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*/
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