Function count

Produces an incrementing value. By default starts at 0 and counts forever, incrementing every second.

const r = Rx.count();
r.onValue(c => {
 // 0, 1, 2, 3 ... every second
});
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The limit is exclusive

const r = Rx.count({limit:5});
// Yields 0,1,2,3,4
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If limit is less than start, it will count down instead.

const r = Rx.count({start:5, limit: 0});
// Yie:ds 5,4,3,2,1
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// Count 10, 12, 14 ... every 500ms
const r = Rx.count({ start: 10, amount: 2, interval: 500 });
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In addition to setting limit (which is exclusive), you can stop with an abort signal

const ac = new AbortController();
const r = Rx.count({signal:ac.signal});
...
ac.abort(`stop`);
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