Knack — Vanilla JS UI Components

Knack is a small, dependency-free UI component library in vanilla JavaScript. Six polished, accessible components — Modal, Tabs, Accordion, Dropdown, Toast and Tooltip — that enhance ordinary HTML through data-knack-* attributes. Drop in one stylesheet and one script, write markup, done. No framework, no build step.

Highlights

• Modal, Tabs, Accordion, Dropdown, Toast, Tooltip — accessible by default.
• Declarative autoInit() via data-attributes, plus imperative class APIs.
• ARIA roles, keyboard support, modal focus trap & scroll lock.
• Custom events (knack:open/close/tabchange) for hooks.
• CSS-variable theming in a single stylesheet.
• Zero dependencies, no build step, ES modules — works with any framework or none.