JS utilities for timing


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00Aug 6, 2018Apr 27, 2018Minified + gzip package size for @prodo-ai/js-timing in KB


JS Timing

Utility library for handling time and timing.


Most of the functions in this library rely on a single main type, Duration. To create a duration, use the duration method:

import {duration, HOUR, SECONDS} from "@prodo-ai/js-timing";

const tenSeconds = duration(10, SECONDS);
const oneHour = duration(1, HOUR);

You can then modify durations, or convert them to different units:

const threeHours = oneHour.times(3);

const waitInMinutes = (numMinutes: number) => {/*...*/};


Returns a Promise that will return after a provided duration;

import {waitFor} from "@prodo-ai/js-timing";

waitFor(duration(10, SECONDS)).then(() => console.log("Done."));


Runs a callback again and again. The optional second parameter specifies how much delay should be included between each execution:

import {repeatedly} from "@prodo-ai/js-timing";

const callback = () => {

const cancel = repeatedly(callback);
waitFor(duration(10, SECONDS)).then(cancel);

const cancel2 = repeatedly(callback, duration(1, SECOND));
waitFor(duration(10, SECONDS)).then(cancel2);

You can control the duration between each execution by returning a Duration from your callback - the execution of the next callback will only happen after that duration has passed:

const callback = () => {
  return duration(1, SECOND);
const cancel = repeatedly(callback);

waitFor(duration(10, SECONDS)).then(cancel); // The callback will executed

You can also specify an error handler:

const callback = () => {
  throw new Error("Failed.");
const errorHandler = (error) => {
const cancel = repeatedly(callback, duration(1, MILLISECOND), errorHandler);


Actually, this is just the same as repeatedly.


Owner: Prodo Tech Ltd

Maintainer: tdawes

License: UNLICENSED (for now)

If you find any bugs or have a feature request, please open an issue on github!

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