Life & fun · alternatives · 2026

24 alternatives to Flynt.js – 2.2kb, zero-build, CSP-safe reactivity library for MPAs

Flynt.js is a reactivity library designed for multi-page applications that weighs just 2.2kb and requires no build process. It operates within Content Security Policy constraints, making it suitable for applications… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

2. 2
   Arrow JavaScript, Reactivity Without the Framework▲32

   A tiny ~2kb library for building reactive interfaces in native JavaScript

   2025 · arrow-js.com · its alternatives →

3. 3
   Faast.js – Serverless Batch Computing Made Simple▲202

   Serverless batch computing made simple

   2019 · faastjs.org · its alternatives →

4. 4
   Divjoy 2.0▲415

   React codebase & UI generator

   2021 · divjoy.com · its alternatives →

5. 5
   1 KB JavaScript library for building front end apps▲242

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

6. 6
   Micron.JS▲214

   A [μ] microInteraction library built with CSS and JavaScript

   2018 · webkul.github.io · its alternatives →

7. 7
   SkateJS – a cross framework web components based library▲144

   Effortless custom elements powered by modern view libraries. - skatejs/skatejs

   2016 · github.com · its alternatives →

8. 8
   FastDom – Lightweight replacement of React and MobX▲41

   Full reactivity JS/TS framework. Lightweight replacement of React + MobX + React Router. Very small and fast !! - PxyUp/Revact

   2019 · github.com · its alternatives →

9. 9
   1kb JavaScript library for building front end applications▲187

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

10. 10
    Divjoy▲311

    The React codebase & UI generator

    2019 · divjoy.com · its alternatives →

11. 11
    1 KB JavaScript library for building applications▲116

    1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

    2017 · github.com · its alternatives →

12. 12
    Minified.js – a fully-featured, 4K alternative to jQuery and MooTools▲158

    2013 · minifiedjs.com · its alternatives →

13. 13
    Swap.js – a JavaScript micro-framework (HTML fragments over the wire)▲127

    Hi HN! I created this lib in the need of a simple and tiny framework to easily do AJAX-style navigation / replacement of fragments in the page, in a web application. For people who don't want to use client-side-rendering and complex frameworks à la React, there are nowadays a few "HTML-over-the-wire" libraries, like HTMX, Unpoly or this super-tiny one Swap.js :) One other key thing is that no external tool is needed: no bundler, no webpack, no TypeScript compiler, no minification needed. Just write HTML, JS (+ your preferred server-side language: PHP, Python, etc.) and it works. The…

    2023 · github.com · its alternatives →

14. 14LA
    LemonadeJS – A micro JavaScript library for building web interfaces▲57

    Reactive components with React-like patterns at ~9 KB gzip. Zero dependencies, zero build step, designed for humans and AI agents.

    2021 · lemonadejs.net · its alternatives →

15. 15BJ
    Bounce.js – A tool for generating CSS3 animations▲172

    2014 · bouncejs.com · its alternatives →

16. 16
    1 KB JavaScript framework for building front-end applications▲216

    1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

    2017 · github.com · its alternatives →

17. 17
    Draft.js▲166

    A framework for building rich text editors in React

    2016 · facebook.github.io · its alternatives →

18. 18
    Dagger.js – A buildless, runtime-only JavaScript micro-framework▲80

    TL;DR: dagger.js is a buildless, runtime-only micro-framework that plays nicely with native Web Components. It uses HTML-first directives (e.g. +click, +load) so you can ship a page by dropping a single from a CDN—no bundlers, no compile step. Why I built it Modern stacks are powerful but often heavy: bundlers, compile steps, framework DSLs, local CLIs. For internal tools, small apps, and edge/serverless deployments, I wanted something you can view-source, paste into a page, and ship. What it is: Runtime-only: no build or VDOM compile; hydrate behaviors directly on HTML. HTML…

    2025 · daggerjs.org · its alternatives →

19. 19
    Nerv – A fast React alternative, compatible with IE8 and React 16▲133

    A blazing fast React alternative, compatible with IE8 and React 16. - NervJS/nerv

    2018 · github.com · its alternatives →

20. 20
    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 →

21. 21
    Impossible.js▲100

    Build terminal apps in JavaScript

    2023 · github.com · its alternatives →

22. 22
    CalDOM: An agnostic, reactive and minimalist JavaScript UI library▲107

    An agnostic, reactive & minimalist (3kb) JavaScript UI library with direct access to native DOM.

    2021 · caldom.org · its alternatives →

23. 23
    Umbrella JS, a 2.5kb jQuery alternative▲132

    :umbrella: Lightweight javascript library for DOM manipulation and events

    2018 · umbrellajs.com · its alternatives →

24. 24
    Connective – Large-scale reactive programming in Javascript/Typescript▲59

    Als E-Commerce und Internetagentur entwickeln wir innovative Webseiten und Online-Shops Lösungen auf OXID und Shopware. Persönliche Beratung ☎️0711-656 83710

    2019 · connective.dev · 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 →