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← UI libraries

Lion

White-label Web Components and JavaScript systems for building a custom design system, including form controls, localization and overlays with minimal visual styling.

Web ComponentsLitFramework agnostic
Visit library ↗ GitHub repository ↗

Working with this library

Checked 2026-10-23 against official sources. MIT source verified in ing-bank/lion. Install @lion/ui and import feature modules, for example @lion/ui/input.js to extend LionInput with Lit CSS, or @lion/ui/define/lion-input.js to register a ready element. The primary documented use is extending classes into a branded component layer, not dropping in a fully styled theme. The landing advertises v1.0 available soon; that is not evidence of a stable v1 release. Editorial: useful for teams who need reusable interaction/form behavior without inheriting a marketing-heavy look. Free licensed core; no paid core plan verified. Browser and accessibility claims are upstream aims, not independent guarantees. Application-level keyboard, validation, form association and framework integration still need checking.

Pricing

Public core

Free

Licensed public component/interaction source. Preserve license notices; unrelated services, commercial templates and third-party assets are excluded.

Last checked Oct 23, 2026. Prices and licensing may change.

Check current pricing and terms ↗

Landing page preview

Landing page of Lion

Captured Oct 23, 2026. This is a visual reference; check the library's license before using its components.

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