What is this?

Loom was born out of pure spite for boilerplate. What began as an ironic "what if decorators did everything?" experiment turned into a genuinely useful framework for building web components.

It powers placing.space in production — a real-time collaborative pixel canvas — so it's been battle-tested with WebSocket streams, thousands of DOM nodes, and zero framework overhead.

Why Loom?

Most frameworks make you choose: lightweight or batteries-included. Loom doesn't.

• ~20KB gzipped baseline — smaller than React + ReactDOM alone, but includes a router, DI container, reactivity system, and lifecycle management out of the box.
• No virtual DOM — JSX compiles to real DOM nodes. The morpher diffs the live DOM directly and patches in-place. No throwaway object trees, no GC pressure, no overhead on top of the work you were going to do anyway.
• Zero dependencies — the entire framework is one package.json entry. No version conflicts, no transitive supply chain risk, no "which router do we pick" debates.
• Pay-as-you-go — built-in components (<loom-virtual>, <loom-canvas>, <loom-icon>, <loom-image>) and systems (@form, @api, CollectionStore) are tree-shaken if you don't import them. You only ship what you use.
• Web standards — built on custom elements, Shadow DOM, and TC39 Stage 3 decorators. When browsers ship native decorator support, your code gets faster for free.

Features

• @component / @styles — register custom elements and scoped styles in one line
• @reactive / @prop — fine-grained reactivity that only re-renders what changed
• @computed / @watch — derived state and side effects
• @on / @emit — declarative event handling via typed event bus
• JSX + DOM morphing — write JSX, get surgical DOM patches (no virtual DOM)
• @inject / @service / @factory — full dependency injection container
• Hash & history router — @route, @guard, @group, <loom-outlet>, <loom-link>
• @api / @intercept — declarative data fetching with SWR, retry, and Result combinators
• @lazy — code-split components with one decorator
• @catch_ / @suspend — error boundaries and async loading state
• @interval / @timeout / @debounce / @throttle / @animationFrame — auto-cleaned timing
• @mount / @unmount — lifecycle hooks
• @form — declarative form binding with validation
• @transform — typed value transforms for props and route params
• Reactive<T> / CollectionStore<T> — observable state with LocalAdapter persistence
• css\`` — adopted stylesheets with zero FOUC
• <loom-virtual> — virtualized list for huge datasets
• createDecorator — build your own decorators with the same factory Loom uses
• Zero dependencies — just TypeScript and the platform

Create a Project

npm create @toyz/loom my-app
cd my-app
npm install
npm run dev

Or install manually:

Install

npm install @toyz/loom

Quick Start

import { LoomElement, component, reactive, css, styles } from "@toyz/loom";

const counterStyles = css`
  button {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
  }
  span {
    font-weight: bold;
    margin-left: 0.5rem;
  }
`;

@component("click-counter")
@styles(counterStyles)
class ClickCounter extends LoomElement {
  @reactive accessor count = 0;

  update() {
    return (
      <button onClick={() => this.count++}>
        Clicks: <span>{this.count}</span>
      </button>
    );
  }
}

<click-counter></click-counter>
<script type="module" src="./main.ts"></script>

TSConfig

Loom uses TC39 decorators, which require es2022 or later. Point your config at the Loom JSX runtime:

{
  "compilerOptions": {
    "target": "es2022",
    "jsx": "react-jsx",
    "jsxImportSource": "@toyz/loom"
  }
}

For Vite:

// vite.config.ts
export default defineConfig({
  esbuild: {
    target: "es2022",
    jsx: "automatic",
    jsxImportSource: "@toyz/loom",
  },
});

Docs

Full documentation with interactive examples:

toyz.github.io/loom

License

MIT — do whatever you want with it.