Life & fun · alternatives · 2026

24 alternatives to MockTheClock – A tiny JavaScript library for spoofing time in browser

A tiny JS library to... spoof timers and other date/time functions. Useful for slowing down 3D animations.... - zb3/MockTheClock

MockTheClock is a JavaScript library that allows developers to manipulate time-related functions in web browsers. It spoofs timers and date/time functions, making it useful for slowing down 3D animations and testing… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. MockTheClock – A tiny JavaScript library for spoofing time in browser launched in 2015; newer entries below may have overtaken it.

1. 1AI
   An Isomorphic JavaScript Framework Faster Than React▲337

   2015 · jsblocks.com · its alternatives →

2. 2
   Nothing.js – A chainable mock object which always returns itself▲89

   A chainable, callable mock object which always returns itself - slmgc/Nothing

   2018 · github.com · its alternatives →

3. 3JL
   JS library to make your website instant▲426

   http://instantclick.io/ It seems the internet architecture won't bring us instant websites anytime soon. So here is a hack. I released this JS library last month (today is version 2.0 release, fixing v1.0's rough edges), it makes use of HTML5's pushState and preloading to make a website instant. It works like this: before clicking on a link, you'll hover over it. And there's a delay of 200-300 ms between these two events. InstantClick uses this delay to preload a page, when you click on a link it will display instantly in most case. (You can test on the website.) That's…

   2014 · its alternatives →

4. 4MC
   Mechanical clock simulation in WebGL▲109

   2015 · nikital.github.io · its alternatives →

5. 5
   Fast 2kB date library alternative to Moment.js with the same API▲122

   ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API - iamkun/dayjs

   2018 · github.com · its alternatives →

6. 6
   288 Analog Clocks Give Digital Time▲117

   JS/ReactJS simulation of A Million Times

   2017 · clocks.80limit.com · its alternatives →

7. 7SJ
   Snabbt.js – a minimalistic animation library▲323

   House of cards demo using animation library snabbt.js

   2015 · daniel-lundin.github.io · its alternatives →

8. 8OS
   Open source balloon simulation with Three.js▲307

   2019 · alexanderperrin.com.au · its alternatives →

9. 9
   FakeTimer▲154

   Create Skewed Countdown Timers

   2024 · faketimer.com · its alternatives →

10. 10BJ
    Bounce.js – A tool for generating CSS3 animations▲172

    2014 · bouncejs.com · its alternatives →

11. 11
    Mockoon – mock REST APIs in seconds▲68

    Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

    2017 · mockoon.com · its alternatives →

12. 12
    Moto - Easy mocking of Boto for your Python AWS tests▲66

    A library that allows you to easily mock out tests based on AWS infrastructure. - getmoto/moto

    2013 · github.com · its alternatives →

13. 13
    Jsblocks▲97

    Faster than AngularJS and ReactJS. Better MV-ish Framework.

    2015 · jsblocks.com · its alternatives →

14. 14
    MockRTC – a mock peer and MitM proxy library for WebRTC▲30

    Powerful friendly WebRTC mock peer & proxy. Contribute to httptoolkit/mockrtc development by creating an account on GitHub.

    2022 · github.com · its alternatives →

15. 15
    A minimal and idiomatic WebSocket library for Go▲99

    Minimal and idiomatic WebSocket library for Go. Contribute to coder/websocket development by creating an account on GitHub.

    2019 · github.com · its alternatives →

16. 16
    Crudlet.js – A common, streamable interface for synchronizing data▲94

    utility library for async iterable iterators. Contribute to crcn/mesh.js development by creating an account on GitHub.

    2015 · github.com · its alternatives →

17. 17
    Stochastic – JavaScript library for simulating stochastic processes▲55

    Simulation of common stochastic processes with native JavaScript - NathanEpstein/stochastic

    2014 · github.com · its alternatives →

18. 18
    Pollux▲82

    Fake json data & json server mock API generator with JWT

    2021 · mohammedal-rowad.github.io · its alternatives →

19. 19AJ
    A Javascript library to overcomplicate Five▲69

    2014 · jackdcrawford.github.io · its alternatives →

20. 20
    Cancelable async primitives for JavaScript▲84

    Composable async primitives with cancelation, control over scheduling, and coroutines. Superior replacement for JS Promises. - mitranim/posterus

    2017 · github.com · its alternatives →

21. 21
    A clock synchronization library in golang for distributed systems▲26

    Distributed Time Synchronization Service. Contribute to rubrikinc/kronos development by creating an account on GitHub.

    2018 · github.com · its alternatives →

22. 22
    Aimless.js – the missing js randomness library▲64

    The missing JavaScript randomness library. Contribute to ChrisCavs/aimless.js development by creating an account on GitHub.

    2023 · github.com · its alternatives →

23. 23
    A tiny and fast reactive observables library via functions▲72

    A tiny (~1kB minzipped) and extremely fast library for creating reactive observables via functions. - maverick-js/signals

    2022 · github.com · its alternatives →

24. 24
    JavaScript port of Scientist library for refactoring critical paths▲34

    :microscope: A JavaScript interpretation of the Ruby library Scientist, a library for carefully refactoring critical paths. - bugthesystem/scientist.js

    2016 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →