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@continuum-js/frp

v1.0.0

Published

Continuum FRP core — Event, Behavior, transactional scheduler

Readme

@continuum-js/frp

Ядро классического FRP: Stream, State и транзакционный планировщик с ранговой протяжкой без глитчей. Не зависит от DOM — пригодно для игр, потоков, анимации, серверной логики.

import { root, stream, state } from "@continuum-js/frp";

const clicks = stream<void>();
// Состояние живёт в скоупе: внутри компонента он есть автоматически,
// на уровне модуля объявляем его явно через root().
const count = root(() => state(0).on(clicks, (n) => n + 1));
count.listen((n) => console.log(n)); // 0, 1, 2, ...
clicks.fire();
clicks.fire();
  • Stream — дискретные происшествия (push): map, filter, when, merge, or, accum/accumE, hold, once, listen.
  • State — значение во времени (pull) + updates: map, at (значение состояния в моменты потока), combine (поточечное соединение), flatten (переключение state-of-states / state-of-streams), fromPoll. За момент ячейка доставляет одно коалесцированное вхождение updates.
  • Источники: stream() c .fire, state(init) c .set и декларативными переходами .on(e, (state, event) => next); constant, never, time.
  • Эффекты и дедуп: perform (граница IO, Result), distinct.

Гарантии: консистентность момента (glitch-free), детерминизм совпадений, FIFO-порядок наблюдателей, задержка hold на границе момента, изоляция ошибок в фазе post.