Reactive Programming

• `Intl.DateTimeFormat`
• dayjs - _Almost_ moment.js-compatible API, covers most use cases, <img align="top" height="24" src="./img/dayjsesm.svg">
• tinytime - Simple date / time formatter: `{h}:{mm} -> 9:33`, <img align="top" height="24" src="./img/tinytime.svg">
• tinydate - Date / time formatter, only supports padded numeric output (`September -> 09`), <img align="top" height="24" src="./img/tinydate.svg">
• time-stamp - More of the same, <img align="top" height="24" src="./img/time-stamp.svg">
• ms - Parse & format ms durations, e.g. `"1m" <-> 60000`, <img align="top" height="24" src="./img/ms.svg">
• timeago.js - Format dates into stuff like _X minutes ago_ or _in X hours,_ <img align="top" height="24" src="./img/timeagojs.svg">
• fromnow - More of the same, <img align="top" height="24" src="./img/fromnow.svg">

Reactive Programming

• freaky math.
• colord - Manipulate colors and convert between spaces, <img align="top" height="24" src="./img/colord.svg">. Extra features come as plugins, 150b to 1.5 kB each.
• colr - More of the same, <img align="top" height="24" src="./img/colr.svg" >
• polychrome - More of the same, <img align="top" height="24" src="./img/polychrome.svg">
• randomcolor - Attractive random colors with configuration. <img align="top" height="24" src="./img/randomcolor.svg">

Reactive Programming

• Porter stemmers
• js-search - Feature-rich and customizable: multi-field indices, stop words, custom stemmers and tokenizers. <img align="top" height="24" src="./img/js-search.svg">
• wade - Also similar, [(compare)](https://leeoniya.github.io/uFuzzy/demos/compare.html?libs=js-search,Wade,ndx&search=twilight%20sag) <img align="top" height="24" src="./img/wade.svg">
• stemmer - <img align="top" height="24" src="./img/stemmer.svg">
• porter-stemmer - <img align="top" height="24" src="./img/porter-stemmer.svg">
• ndx - Similar to js-search, differs in [ranking](https://kmwllc.com/index.php/2020/03/20/understanding-tf-idf-and-bm-25/) and is less strict for multi-word queries [(compare)](https://leeoniya.github.io/uFuzzy/demos/compare.html?libs=js-search,ndx,Wade&search=twilight%20sag). Supports field weights. <img align="top" height="24" src="./img/ndx-ndxquery.svg">
• libsearch - Index-free search (slower, but easier to use) with sane ordering <img align="top" height="24" src="./img/libsearch.svg">
• snowball-js - languages](https://github.com/MihaiValentin/lunr-languages) supports 30 languages but only works with [lunr,](https://github.com/olivernn/lunr.js) the most promising one is [natural](https://github.com/NaturalNode/natural/tree/master/lib/natural/stemmers) but it depends on Node.js.

Fuzzy search

• fuzzy - Index-free, can highlight matches. <img align="top" height="24" src="./img/fuzzy.svg">
• fuzzy-search - With stateful index. <img align="top" height="24" src="./img/fuzzy-search.svg">
• fzy.js - Matches one string at a time, tree-shakeable scores and match highlighting. <img align="top" height="24" src="./img/fzyjs.svg"> total, or ~150 bytes for `hasMatch` only.
• fuzzysearch - One string at a time, does not compute score / rank. <img align="top" height="24" src="./img/fuzzysearch.svg">
• liquidmetal - Quicksilver algorithm, prioritizes matches at start of word for command abbreviations (e.g. `gp` -> `git push`). One string at a time. <img align="top" height="24" src="./img/liquidmetal.svg">
• quick-score - Another quicksilver-based lib, tweaked for long strings. Built-in list filtering and sorting, <img align="top" height="24" src="./img/quick-score.svg"> or 1.2 kB for single-string scoring.
• fuzzyset - Find misspellings, e.g. missipissi -> Missisipi, <img align="top" height="24" src="./img/fuzzyset.svg"> Commercial usage costs $42.

Reactive Programming

• flyd - Rx-styled event streams, <img align="top" height="24" src="./img/flyd.svg">
• callbag-basics - Rx-style event streams, <img align="top" height="24" src="./img/callbag-basics.svg">

Signals

• flimsy - Signals from Solid (it _almost_ fit into UI frameworks category itself). Author warning: _it's probably buggy._ <img align="top" height="24" src="./img/flimsy.svg">
• oby - shaking, but otherwise is around 7 kB.
• @preact/signals - The OG signals from preact <img align="top" height="24" src="./img/preactsignals-core.svg"> core, <img align="top" height="24" src="./img/preactsignals-react.svg"> with react integration.
• usignal - A smaller signal implementation, <img align="top" height="24" src="./img/usignal.svg">
• hyperactiv - 4 functions to make objects observable and listen to changes, <img align="top" height="24" src="./img/hyperactiv.svg">

• zustand - Simple stores with pleasant actions and selectors. Vanilla <img align="top" height="24" src="./img/zustandvanilla.svg">, React <img align="top" height="24" src="./img/zustand.svg">
• nanostores - Modular store with good tree-shaking support, <img align="top" height="24" src="./img/nanostores.svg"> vanilla, + React <img align="top" height="24" src="./img/nanostoresreact.svg"> extra. Supports all the top frameworks.
• exome - Atomic stores with lots of framework connectors, <img align="top" height="24" src="./img/exome.svg"> + React <img align="top" height="24" src="./img/exomereact.svg"> extra. Supports all the top frameworks.
• storeon - Minimal redux-styled store with lots of framework connectors, <img align="top" height="24" src="./img/storeon.svg">. React extra <img align="top" height="24" src="./img/storeonreact.svg"> + Vue, Svelte, Angular.
• unistore - Centralized store with actions, <img align="top" height="24" src="./img/unistore.svg"> + React <img align="top" height="24" src="./img/unistorereact.svg">
• teaful - Store with useState-like API, <img align="top" height="24" src="./img/teaful.svg">, including React / preact connector.

Reactive Programming

• @nanostores/router - Routes as a nanostores store (framework-agnostic), <img align="top" height="24" src="./img/nanostoresrouter.svg">
• navaid - History-based observable router, <img align="top" height="24" src="./img/navaid.svg">
• matchit - Route parser and matcher in <img align="top" height="24" src="./img/matchit.svg">
• regexparam - Convert path to regexp in <img align="top" height="24" src="./img/regexparam.svg">
• qss - Parse querystrings in <img align="top" height="24" src="./img/qss.svg">. Not sure you need it, [URL API](https://developer.mozilla.org/en-US/docs/Web/API/URL) support is good.
• wouter - Declarative router for React / preact, <img align="top" height="24" src="./img/wouter.svg">, also available as a standalone hook: <img align="top" height="24" src="./img/wouteruse-browser-location.svg">

Reactive Programming

• redaxios - Drop-in axios replacement for modern browsers, <img align="top" height="24" src="./img/redaxios.svg">
• wretch - Chainable API with error processing and lots of extra plugins, <img align="top" height="24" src="./img/wretch.svg">
• gretchen - Chainable API with type-safe errors, <img align="top" height="24" src="./img/gretchen.svg">
• unfetch - Loose fetch polyfill, <img align="top" height="24" src="./img/unfetch.svg">

Reactive Programming

• rosetta - Bare-bones template strings (`{{hello}}, {{username}}`) and custom functions for everyting else, <img align="top" height="24" src="./img/rosetta.svg">
• lingui - Small core with template strings, <img align="top" height="24" src="./img/linguicore.svg">
• @nanostores/i18n - Detect locale, load dictionaries, format dates / numbers, <img align="top" height="24" src="./img/nanostoresin.svg"> including nanostores.
• eo-locale - Interpolation and dates / numbers, <img align="top" height="24" src="./img/eo-localecore.svg">, or <img align="top" height="24" src="./img/eo-localereact.svg"> with react bindings.

Reactive Programming

• remeda - 90 tree-shakable helpers [(list).](https://bundlephobia.com/package/remeda)
• rambda - 187 tree-shakable helpers [(list).](https://bundlephobia.com/package/rambda)
• just - 82 helpers in separate packages [(list).](https://anguscroll.com/just/)
• @fxts/core - 96 tree-shakable helpers. Lazy evaluation support.
• underscore, - 1 kB helpers. It does not tree-shake as well as the libraries above due to codebase structure.

Reactive Programming

• v8n - zod-style API with fine-grained checks: `v8n().string().minLength(5).first("H").last("o")`. No tree shaking, <img align="top" height="24" src="./img/vn.svg">
• banditypes - The smallest validation library: <img align="top" height="24" src="./img/banditypes.svg">
• superstruct - The most popular modular validation library with good tree-shaking, <img align="top" height="24" src="./img/superstruct.svg">
• valibot - Another modular validation library, <img align="top" height="24" src="./img/valibot.svg">
• deep-waters - Composable functional validators, <img align="top" height="24" src="./img/deep-waterscompose-deep-watershasShape-deep-watersarrayOf-deep-watersisString-deep-watersisNumber-deep-watersisBoolean.svg">.

Reactive Programming

• @lukeed/uuid - Real UUIDs, <img align="top" height="24" src="./img/lukeeduuid.svg">
• nanoid - Random IDs with larger alphabet, <img align="top" height="24" src="./img/nanoid.svg">
• uid - More of the same, <img align="top" height="24" src="./img/uid.svg">
• hexoid - Hexadecimal IDs, <img align="top" height="24" src="./img/hexoid.svg">
• native `crypto.randomUUID` - api_crypto_randomuuid)

Reactive Programming

• alloyfinger - Pan, swipe, tap, doubletap, longpress, _and_ pinch / rotate. My personal favorite. <img align="top" height="24" src="./img/alloyfinger.svg">.
• tinygesture - Configurable pan, swipe, tap, doubletap, longpress. <img align="top" height="24" src="./img/tinygesture.svg">.
• pointer-tracker - Unified interface for mouse, touch and pointer events, <img align="top" height="24" src="./img/pointer-tracker.svg">
• any-touch - gesture,](https://github.com/react-component/gesture) used in ant design system, could be the only react component on the list, but babel-runtime / corejs polyfills hard-wired into the build push the ~2.5 kB size to over 10 kB.
• detect-it - Detect present and primary input method (touch / mouse) and supported events, <img align="top" height="24" src="./img/detect-it.svg">

Fuzzy search

• Vladimir Klepov