**WIP** (the experimentation phase)
| [source code on GitHub](https://github.com/jaandrle/deka-dom-el)
| [*mirrored* on Gitea](https://gitea.jaandrle.cz/jaandrle/deka-dom-el)
| [](https://robinpokorny.github.io/git3moji/) <!-- editorconfig-checker-disable-line -->
<p align="center">
<img src="docs/assets/logo.svg" alt="Deka DOM Elements Logo" width="180" height="180">
</p>
# Deka DOM Elements (dd\<el\> or DDE)
***Vanilla for flavouring — a full-fledged feast for large projects***
*…use simple DOM API by default and library tools and logic when you need them*
```javascript
// 🌟 Reactive component with clear separation of concerns
document.body.append(
el(EmojiCounter, { initial: "🚀" })
);
function EmojiCounter({ initial }) {
// ✨ State - Define reactive data
const count = S(0);
const emoji = S(initial);
/** @param {HTMLOptionElement} el */
const isSelected= el=> (el.selected= el.value===initial);
// 🔄 View - UI updates automatically when signals change
return el().append(
el("p", {
className: "output",
textContent: S(() =>
`Hello World ${emoji.get().repeat(count.get())}`),
}),
// 🎮 Controls - Update state on events
el("button", { textContent: "Add Emoji" },
on("click", () => count.set(count.get() + 1))
),
el("select", null, on.host(el=> el.value= initial),
on("change", e => emoji.set(e.target.value))
).append(
el(Option, "🎉"),
el(Option, "🚀"),
el(Option, "💖"),
)
);
}
function Option({ textContent }){
return el("option", { value: textContent, textContent });
}
```
Creating reactive elements, components, and Web Components using the native
[IDL](https://developer.mozilla.org/en-US/docs/Glossary/IDL)/JavaScript DOM API enhanced with
[**signals/observables**](#understanding-signals).
## Features at a Glance
- ✅ **No build step required** — use directly in browsers or Node.js
- ☑️ **Lightweight** — ~10-15kB minified (original goal 10kB) with zero/minimal dependencies
- ✅ **Declarative & functional approach** for clean, maintainable code
- ✅ **Signals and events** for reactive UI
- ✅ **Memoization for performance** — optimize rendering with intelligent caching
- ✅ **Optional build-in signals** with support for custom reactive implementations
- ✅ **Server-side rendering** support via [jsdom](https://github.com/jsdom/jsdom)
- ✅ **TypeScript support** (work in progress)
- ☑️ **Support for debugging with browser DevTools** without extensions
- ☑️ **Enhanced Web Components** support (work in progress)
## Why Another Library?
This library bridges the gap between minimal solutions like van/hyperscript and more comprehensive frameworks like
[solid-js](https://github.com/solidjs/solid), offering a balanced trade-off between size, complexity, and usability.
Following functional programming principles, dd\<el\> starts with pure JavaScript (DOM API) and gradually adds
auxiliary functions. These range from minor improvements to advanced features for building complete declarative
reactive UI templates.
A key advantage: any internal function (`assign`, `classListDeclarative`, `on`, `dispatchEvent`, `S`, etc.) can be used
independently while also working seamlessly together. This modular approach makes it easier to integrate the library
into existing projects.
## Getting Started
### Installation
#### npm
```bash
# TBD
# npm install deka-dom-el
```
#### CDN / Direct Script
For CDN links and various build formats (ESM/IIFE, with/without signals, minified/unminified), see the [interactive
format selector](https://jaandrle.github.io/deka-dom-el/) on the documentation site.
```html
<!-- Example with IIFE build (creates a global DDE object) -->
<script src="https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/iife-with-signals.min.js"></script>
<script>
const { el, S } = DDE;
// Your code here
</script>
<!-- Or with ES modules -->
<script type="module">
import { el, S } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.min.js";
// Your code here
</script>
```
### Documentation
- [**Interactive Guide**](https://jaandrle.github.io/deka-dom-el)
- [**Examples**](https://jaandrle.github.io/deka-dom-el/p15-examples.html)
## Understanding Signals
Signals are the reactive backbone of Deka DOM Elements:
- [Signals — what's going on behind the scenes](https://itnext.io/signals-whats-going-on-behind-the-scenes-ec858589ea63)
- [The Evolution of Signals in JavaScript](https://dev.to/this-is-learning/the-evolution-of-signals-in-javascript-8ob)
- [TC39 Signals Proposal](https://github.com/tc39/proposal-signals) (future standard)
- [Observer pattern](https://en.wikipedia.org/wiki/Observer_pattern) (underlying concept)
## Contributing
We welcome contributions from the community! Please see our [Contributing Guide](CONTRIBUTING.md) for details on how to
get started, coding standards, commit guidelines, and the pull request process.
## Inspiration and Alternatives
- [vanjs-org/van](https://github.com/vanjs-org/van) — World's smallest reactive UI framework
- [adamhaile/S](https://github.com/adamhaile/S) — Simple, clean, fast reactive programming
- [hyperhype/hyperscript](https://github.com/hyperhype/hyperscript) — Create HyperText with JavaScript
- [potch/signals](https://github.com/potch/signals) — A small reactive signals library
- [AseasRoa/paintor](https://github.com/AseasRoa/paintor) - JavaScript library for building reactive client-side user
interfaces or HTML code.
- [pota](https://pota.quack.uy/) — small and pluggable Reactive Web Renderer. It's compiler-less, includes an html
function, and a optimized babel preset in case you fancy JSX.
- [jaandrle/dollar_dom_component](https://github.com/jaandrle/dollar_dom_component) —
Functional DOM components without JSX/virtual DOM
- [TarekRaafat/eleva](https://github.com/TarekRaafat/eleva) — A minimalist, lightweight, pure vanilla JavaScript
frontend runtime framework.
- [didi/mpx](https://github.com/didi/mpx) — Mpx，一款具有优秀开发体验和深度性能优化的增强型跨端小程序框架
- [mxjp/rvx](https://github.com/mxjp/rvx) — A signal based frontend framework