Behavior only
Each controller owns the hard part — ARIA roles and state, keyboard interaction, focus management — and nothing else.
Headless Stimulus UI for Rails
Breathe life into your HTML.
Behavior-only UI primitives for Rails. Every control ships its ARIA state, keyboard interaction, and focus management as data-*-driven Stimulus controllers — and no CSS, so the look stays entirely yours.
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$ bundle add stimeo-ui $ bin/rails generate stimeo:install ✓ controllers wired · zero CSS shipped
Why headless?
The hard parts, solved. The look, left to you.
Accessible by default
Components implement the matching WAI-ARIA APG pattern and the related WCAG 2.2 AA criteria, so correctness is the starting point.
Your design system
No bundled CSS and no visual lock-in. Your styles read the ARIA and data attributes the controllers expose.
Zero extra dependencies
The only runtime dependency is @hotwired/stimulus. The lone exception, @floating-ui/dom for dynamic positioning, is added only if you opt in.
See it run
100+ components, each with a live, copy-paste demo.
stimeo--command-palette
Command Palette
An accessible command launcher. Combines Dialog + Combobox with virtual focus, roving keys, focus traps, and inline filtering.
stimeo--data-grid
Data Grid
Adds column sorting, row selection, and roving cell navigation to a table.
stimeo--date-range-picker
Date Range Picker
A two-point date range picker with preview and presets, derived from Calendar.
stimeo--combobox
Combobox
A text input with a filtered listbox popup (list autocomplete) and full keyboard support.
Ship behavior. Keep your design system.
Add Stimeo UI to a Rails app in two commands. Accessible by default, Turbo-resilient, and styled entirely by you.