Loom

Opinionated UI system & composition library for cross-platform web applications.
An open-source, accessibility-first component library and design-token system — Vue 3, TypeScript and Tailwind CSS — from mobile to ultrawide.
Build the interface once. Ship it everywhere. Never re-decide what a button is.

Documentation →

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Every product rewrites its buttons. That is the tax Loom exists to stop paying.

A design system is not a folder of components. It is a decision, made once, that every screen inherits — how far apart two things sit, how a dialog gives focus back, what "destructive" looks like at 3am on a low-contrast monitor. Hand that decision to each product and it is not made once. It is made again, slightly differently, every sprint, by whoever is closest to the deadline.

Loom is where that decision lives. One vocabulary of design tokens, one set of accessible UI primitives, one motion language — consumed by every surface, owned by none of them. Open source under Apache-2.0, so you can take it into your own product on the same terms.

Built for cross-platform web applications

Loom is designed for applications that run everywhere the web does: browsers, progressive web apps, Electron, and Tauri (desktop and mobile). A component library for products that need desktop window chrome, responsive layouts that stretch from phone to ultrawide, and an opinionated visual language that is ready to ship — not a skeleton to assemble.

That premise demands more than a component dump. It demands:

• Responsive composition, not just responsive CSS — layout primitives that adapt to viewport and container, so a sidebar collapses at the right width and a master-detail panel stacks on mobile without the host writing a breakpoint.
• Desktop awareness — title bars, window controls, safe-area insets. A Tauri or Electron window has chrome a web page does not, and the components that live in it need to know that.
• Content never stretches to infinity — on an ultrawide monitor, readable content is bounded and the extra viewport goes to intentional whitespace, side panels, or supplementary content. Never to stretching.
• Same design language on every viewport — a button is the same button at 320px and 3440px. The layout around it changes; the button does not.

Loom originated within the Ecoma ecosystem and is developed as an independent open-source UI system.

What Loom gives you

Design tokens	Colour, spacing, radius, elevation, typography and motion — one source that light mode and dark mode both read from, so a rebrand is an edit rather than an audit.
UI primitives	The generic controls every product needs and no product should own: buttons, inputs, selects, dialogs, menus, toasts, tooltips, skeletons, switches, progress.
Composition primitives	Layout building blocks — Stack, Grid, Split, Center, Sidebar — that express spatial intent and adapt to viewport without the host writing breakpoint queries.
Blocks	Compositions worth standardising once — empty states, page headers, title bars, sidebar navigation — assembled from primitives, never from scratch.
Accessibility, built in	Keyboard paths, focus restoration, accessible names and reduced-motion behaviour ship inside the component. WCAG is the acceptance bar, not a checklist run afterwards.
Theming that survives	Every visual decision is a token reference, so white-labelling a tenant is configuration rather than a fork.
Typed and tree-shakeable	Ships ES modules with TypeScript types. Consumers bundle what they import and nothing more.

Who this is for

• Teams building cross-platform web applications — especially those targeting desktop (Electron, Tauri) alongside browser and mobile, where existing component libraries assume a web page, not an application window.
• Design-system maintainers — the token model, the artifact-per-primitive convention and the accessibility bar are all readable in the open, Apache-2.0, and free to borrow.
• Anyone tired of re-deciding what a button is — Loom is opinionated so you don't have to be. Ship the defaults, override the tokens that don't fit, and leave the rest alone.

Getting started

Requirements: Node ≥ 24 and pnpm 11 (pinned in package.json, so Corepack fetches the right one for you).

git clone https://github.com/ecoma-io/loom.git
cd loom
pnpm install

pnpm install also installs the Git hooks, so formatting, linting and commit message checks run before anything reaches a branch.

pnpm lint        # ESLint
pnpm typecheck   # tsc --noEmit
pnpm test        # Vitest
pnpm e2e         # Playwright
pnpm format      # Prettier, in place

The component surface is landing in the open, one primitive at a time — packages/loom/src/index.ts is always the complete export list. Follow along or ask for something specific in the issues.

Contributing

Loom holds what is generic — an affordance more than one product reaches for the same way. That single rule decides most questions about what belongs here, and CONTRIBUTING.md covers the rest: the commit format, the tiers of tests, and what a reviewer will look for.

Everyone taking part is held to the Code of Conduct. Security issues go through SECURITY.md — never a public issue.

Frequently asked

Can I use Loom outside Ecoma? Yes. It is Apache-2.0, has no runtime dependency on any Ecoma platform, and is designed to be consumed as an ordinary npm package.

Why Apache-2.0 and not MIT? Apache-2.0 carries an explicit patent grant. For a component library that ends up embedded in commercial products, that is the difference between "probably fine" and "written down".

Which framework does it target? Vue 3 with TypeScript, styled through Tailwind CSS. The design tokens themselves are framework-neutral CSS custom properties, so they are usable anywhere.

Does it support dark mode? Dark is derived from the same token set as light rather than maintained as a second theme, which is why the two cannot drift apart. A useTheme composable switches between light, dark, and system preference.

How is accessibility verified? Keyboard operation, focus restoration and accessible naming are pinned by tests and reviewed on every pull request — see the accessibility section of CONTRIBUTING.md.

What about responsive layouts? Loom provides composition primitives (Stack, Grid, Split, Center, Sidebar) that express layout intent and adapt to viewport width. Content is bounded at readable widths on ultrawide screens — extra viewport goes to whitespace, not stretching.

License

Apache License 2.0 © Ecoma.

Use it, ship it, fork it, sell what you build with it.

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