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Dev tools · May 2, 2025

LemonadeJS

Hey HN, We just released v5 of LemonadeJS, a micro-reactive library (~5.5KB compressed, no dependencies) that brings reactivity, scoped state, and JSX support to browser-native JavaScript. Key Features in v5: - Private reactive state for components - Scoped events for modularity - JSX support (via a Babel plugin) - children argument for nested components - Template literal interpolation - Improved DOM rendering performance Use it with plain JS, TypeScript, or JSX — no build step required. Ideal for browser tools, widgets, or building fast UIs without bundlers.…

LemonadeJS launched on May 2, 2025 with 21 votes, #814 of 7,905 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.

What it does

LemonadeJS is a lightweight vanilla javascript reactive micro library (7Kb) that helps the integration between the JavaScript and the HTML..

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

Reactive components with a React-like API in ~9 KB gzip : zero dependencies, no build step. Designed for both human developers and AI agents. import { html, mount } from 'lemonadejs' ; const Counter = (props, { state }) => { const count = state( 0 ); return html`<div> <h1>${count}</h1> <button onclick="${() => count.value++}">+1</button> </div>`; }; mount(Counter, document.getElementById( 'app' )); ● live: this exact code, running on this page Every component is published with a typed contract and checked against it. The result is machine-readable JSON, consumable by humans, agents, and CI. component('switch', { bind: false, label: '', onchange: Function, api: { toggle: Function }, }, fn);…from lemonadejs.com

In the maker’s words, at launch

Hey HN, We just released v5 of LemonadeJS, a micro-reactive library (~5.5KB compressed, no dependencies) that brings reactivity, scoped state, and JSX support to browser-native JavaScript. Key Features in v5: - Private reactive state for components - Scoped events for modularity - JSX support (via a Babel plugin)…

Does a similar job

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  • LA
    LemonadeJS – A micro JavaScript library for building web interfaces2021 · lemonadejs.net · ▲57

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

  • LemonadeJS 2 Micro(6Kb) Reactive Library. No Transpile, No Dependencies2022 · github.com · ▲5

    LemonadeJS is a 7KB reactive JavaScript micro-library offering two-way data binding. It is dependency-free, does not require transpiling, and works with webpack or directly in the browser. - lemonadejs/lemonadejs

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