aeon-scheduler

Scheduler implementations for Aeon, a denotationally-designed reactive programming library for TypeScript.

This package provides:

• DefaultScheduler — production scheduler backed by performance.now() with a binary-heap timer queue and microtask batching for zero-delay tasks
• VirtualScheduler — fully deterministic synchronous scheduler for tests; supports advance(duration), advanceTo(time), flush(), runAll()
• PerformanceClock, DateClock, VirtualClock — pluggable clock implementations

Installation

pnpm add aeon-core aeon-scheduler

Quick Start

import { fromArray, map, observe } from "aeon-core";
import { DefaultScheduler } from "aeon-scheduler";

const scheduler = new DefaultScheduler();

await observe(
  (v) => console.log(v),
  map((x) => x * 2, fromArray([1, 2, 3])),
  scheduler,
);
// 2, 4, 6

For tests, use the VirtualScheduler to control time deterministically:

import { VirtualScheduler } from "aeon-scheduler";

const scheduler = new VirtualScheduler();
// schedule things, then advance virtual time:
scheduler.advance(toDuration(1000));

Documentation

• Main README
• Getting Started

License

MIT