FicusJS

FicusJS is a set of lightweight functions for building modern web applications using web components. The current stable version is 6.3.0, released regularly with active maintenance. It provides features like fast custom elements, renderers (htm, lit-html, uhtml, Preact), local state, finite state machines, application stores, event bus, i18n, and more. Key differentiators: small footprint, no build step required, works with native ES modules, and ships TypeScript types. It is designed to be extensible and framework-agnostic, supporting multiple rendering libraries.