@thi.ng/rstream/interval.js

Reactive streams & subscription primitives for constructing dataflow graphs / pipelines

import { __optsWithID } from "./idgen.js";
import { stream } from "./stream.js";
const fromInterval = (delay, opts) => {
  opts = __optsWithID("interval", {
    num: Infinity,
    ...opts
  });
  return stream((stream2) => {
    let i = 0;
    let count = opts.num;
    stream2.next(i++);
    let id = setInterval(() => {
      stream2.next(i++);
      if (--count <= 0) {
        clearInterval(id);
        stream2.closeIn !== "never" && stream2.done();
      }
    }, delay);
    return () => clearInterval(id);
  }, opts);
};
export {
  fromInterval
};