stwui, an open-source Svelte library

The problem

Building product UI in Svelte meant rebuilding the same unglamorous parts on every project: inputs, tables, modals, date pickers, toasts. Svelte had the reactivity but not the batteries-included component layer that React developers took for granted, so most teams started from a blank page every time.

The idea

One opinionated but customizable component library, styled with Tailwind, that gives Svelte the same batteries-included feel. Sensible defaults you can theme from a single place, so you compose an app instead of rebuilding primitives, and you reach for a prop instead of memorizing class names.

What I built

• 49 components covering the real surface area of an app: forms and inputs, tables and lists, modals and drawers, date pickers, toasts, and more.
• A Tailwind plugin and theming layer, so the whole set restyles from a single place.
• A documentation and demo site with a live example for every component.
• Published to npm under an MIT license, versioned and open to outside contributors.

Impact

• Over 450 stars and 20+ forks on GitHub, still pulling around a thousand npm installs a month.
• The one project on this list you can install, read the source of, and use today.
• A public, developer-facing counterpart to the internal systems: the same eye for interface, aimed at other engineers instead of one company.