Atom

import { Atom } from '@hullo/core';
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const a = new Atom(/* initial state */ 0);
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/* This will not get anywhere as a message
 * but it'll be resent to any future subscriber
 * as a first message */
a.next(1);
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/* This subscription will log out to the console
 * "A 1" immediately as that is a state of atom a */
const sub1 = a.subscribe({
  next: v => { console.log('A', v); }
});
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/* As there's no new subscription sending a message
 * will trigger the same reaction
 * as if `a` would be a channel.
 * It will log "A 2" to the console */
a.next(2);
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/* Every new subscription to an atom
 * Will receive last message as its first message.
 * This logs out "B 2".
 * First subscription will not have this resent */
const sub2 = a.subscribe({
  next: v => { console.log('B', v); }
});
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